Note: The text of the following Sections N1101.2 through N1105 is extracted from the 2012 edition of the International Energy Conservation Code—Residential Provisions and has been editorially revised to conform to the scope and application of this code. The section numbers appearing in parenthesis after each section number are the section numbers of the corresponding text in the International Energy Conservation Code—Residential Provisions.
FIGURE N1101.10 (R301.1)
CLIMATE ZONES
TABLE N1101.10 (R301.1)
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
Key: A – Moist, B – Dry, C – Marine. Absence of moisture designation indicates moisture regime is irrelevant.
Asterisk (*) indicates a warm-humid location.
US STATES
ALABAMA | 3A Lee | 7 Kodiak Island | 4A Boone | 3A Mississippi | |
3A Limestone | 7 Lake and | 3A Bradley | 3A Monroe | ||
3A Autauga* | 3A Lowndes* | Peninsula | 3A Calhoun | 3A Montgomery | |
2A Baldwin* | 3A Macon* | 7 Matanuska- | 4A Carroll | 3A Nevada | |
3A Barbour* | 3A Madison | Susitna | 3A Chicot | 4A Newton | |
3A Bibb | 3A Marengo* | 8 Nome | 3A Clark | 3A Ouachita | |
3A Blount | 3A Marion | 8 North Slope | 3A Clay | 3A Perry | |
3A Bullock* | 3A Marshall | 8 Northwest Arctic | 3A Cleburne | 3A Phillips | |
3A Butler* | 2A Mobile* | 7 Prince of Wales | 3A Cleveland | 3A Pike | |
3A Calhoun | 3A Monroe* | Outer Ketchikan | 3A Columbia* | 3A Poinsett | |
3A Chambers | 3A Montgomery* | 7 Sitka | 3A Conway | 3A Polk | |
3A Cherokee | 3A Morgan | 7 Skagway-Hoonah- | 3A Craighead | 3A Pope | |
3A Chilton | 3A Perry* | Angoon | 3A Crawford | 3A Prairie | |
3A Choctaw* | 3A Pickens | 8 Southeast | 3A Crittenden | 3A Pulaski | |
3A Clarke* | 3A Pike* | Fairbanks | 3A Cross | 3A Randolph | |
3A Clay | 3A Randolph | 7 Valdez-Cordova | 3A Dallas | 3A Saline | |
3A Cleburne | 3A Russell* | 8 Wade Hampton | 3A Desha | 3A Scott | |
3A Coffee* | 3A Shelby | 7 Wrangell- | 3A Drew | 4A Searcy | |
3A Colbert | 3A St. Clair | Petersburg | 3A Faulkner | 3A Sebastian | |
3A Conecuh* | 3A Sumter | 7 Yakutat | 3A Franklin | 3A Sevier* | |
3A Coosa | 3A Talladega | 8 Yukon-Koyukuk | 4A Fulton | 3A Sharp | |
3A Covington* | 3A Tallapoosa | ARIZONA | 3A Garland | 3A St. Francis | |
3A Crenshaw* | 3A Tuscaloosa | 3A Grant | 4A Stone | ||
3A Cullman | 3A Walker | 5B Apache | 3A Greene | 3A Union* | |
3A Dale* | 3A Washington* | 3B Cochise | 3A Hempstead* | 3A Van Buren | |
3A Dallas* | 3A Wilcox* | 5B Coconino | 3A Hot Spring | 4A Washington | |
3A DeKalb | 3A Winston | 4B Gila | 3A Howard | 3A White | |
3A Elmore* | ALASKA | 3B Graham | 3A Independence | 3A Woodruff | |
3A Escambia* | 3B Greenlee | 4A Izard | 3A Yell | ||
3A Etowah | 7 Aleutians East | 2B La Paz | 3A Jackson | CALIFORNIA | |
3A Fayette | 7 Aleutians West | 2B Maricopa | 3A Jefferson | ||
3A Franklin | 7 Anchorage | 3B Mohave | 3A Johnson | 3C Alameda | |
3A Geneva* | 8 Bethel | 5B Navajo | 3A Lafayette* | 6B Alpine | |
3A Greene | 7 Bristol Bay | 2B Pima | 3A Lawrence | 4B Amador | |
3A Hale | 7 Denali | 2B Pinal | 3A Lee | 3B Butte | |
3A Henry* | 8 Dillingham | 3B Santa Cruz | 3A Lincoln | 4B Calaveras | |
3A Houston* | 8 Fairbanks North | 4B Yavapai | 3A Little River* | 3B Colusa | |
3A Jackson | Star | 2B Yuma | 3A Logan | 3B Contra Costa | |
3A Jefferson | 7 Haines | ARKANSAS | 3A Lonoke | 4C Del Norte | |
3A Lamar | 7 Juneau | 4A Madison | 4B El Dorado | ||
3A Lauderdale | 7 Kenai Peninsula | 3A Arkansas | 4A Marion | 3B Fresno | |
3A Lawrence | 7 Ketchikan | 3A Ashley | 3A Miller* | 3B Glenn | |
Gateway | 4A Baxter | ||||
4A Benton |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
4C Humboldt | 3B Yuba | 5B Morgan | 2A Escambia* | 2A Taylor* | |
2B Imperial | COLORADO | 4B Otero | 2A Flagler* | 2A Union* | |
4B Inyo | 6B Ouray | 2A Franklin* | 2A Volusia* | ||
3B Kern | 5B Adams | 7 Park | 2A Gadsden* | 2A Wakulla* | |
3B Kings | 6B Alamosa | 5B Phillips | 2A Gilchrist* | 2A Walton* | |
4B Lake | 5B Arapahoe | 7 Pitkin | 2A Glades* | 2A Washington* | |
5B Lassen | 6B Archuleta | 5B Prowers | 2A Gulf* | GEORGIA | |
3B Los Angeles | 4B Baca | 5B Pueblo | 2A Hamilton* | ||
3B Madera | 5B Bent | 6B Rio Blanco | 2A Hardee* | 2A Appling* | |
3C Marin | 5B Boulder | 7 Rio Grande | 2A Hendry* | 2A Atkinson* | |
4B Mariposa | 6B Chaffee | 7 Routt | 2A Hernando* | 2A Bacon* | |
3C Mendocino | 5B Cheyenne | 6B Saguache | 2A Highlands* | 2A Baker* | |
3B Merced | 7 Clear Creek | 7 San Juan | 2A Hillsborough* | 3A Baldwin | |
5B Modoc | 6B Conejos | 6B San Miguel | 2A Holmes* | 4A Banks | |
6B Mono | 6B Costilla | 5B Sedgwick | 2A Indian River* | 3A Barrow | |
3C Monterey | 5B Crowley | 7 Summit | 2A Jackson* | 3A Bartow | |
3C Napa | 6B Custer | 5B Teller | 2A Jefferson* | 3A Ben Hill* | |
5B Nevada | 5B Delta | 5B Washington | 2A Lafayette* | 2A Berrien* | |
3B Orange | 5B Denver | 5B Weld | 2A Lake* | 3A Bibb | |
3B Placer | 6B Dolores | 5B Yuma | 2A Lee* | 3A Bleckley* | |
5B Plumas | 5B Douglas | CONNECTICUT | 2A Leon* | 2A Brantley* | |
3B Riverside | 6B Eagle | 2A Levy* | 2A Brooks* | ||
3B Sacramento | 5B Elbert | 5A (all) | 2A Liberty* | 2A Bryan* | |
3C San Benito | 5B El Paso | DELAWARE | 2A Madison* | 3A Bulloch* | |
3B San Bernardino | 5B Fremont | 2A Manatee* | 3A Burke | ||
3B San Diego | 5B Garfield | 4A (all) | 2A Marion* | 3A Butts | |
3C San Francisco | 5B Gilpin | DISTRICT OF COLUMBIA | 2A Martin* | 3A Calhoun* | |
3B San Joaquin | 7 Grand | 1A Miami-Dade* | 2A Camden* | ||
3C San Luis Obispo | 7 Gunnison | 4A (all) | 1A Monroe* | 3A Candler* | |
3C San Mateo | 7 Hinsdale | FLORIDA | 2A Nassau* | 3A Carroll | |
3C Santa Barbara | 5B Huerfano | 2A Okaloosa* | 4A Catoosa | ||
3C Santa Clara | 7 Jackson | 2A Alachua* | 2A Okeechobee* | 2A Charlton* | |
3C Santa Cruz | 5B Jefferson | 2A Baker* | 2A Orange* | 2A Chatham* | |
3B Shasta | 5B Kiowa | 2A Bay* | 2A Osceola* | 3A Chattahoochee* | |
5B Sierra | 5B Kit Carson | 2A Bradford* | 2A Palm Beach* | 4A Chattooga | |
5B Siskiyou | 7 Lake | 2A Brevard* | 2A Pasco* | 3A Cherokee | |
3B Solano | 5B La Plata | 1A Broward* | 2A Pinellas* | 3A Clarke | |
3C Sonoma | 5B Larimer | 2A Calhoun* | 2A Polk* | 3A Clay* | |
3B Stanislaus | 4B Las Animas | 2A Charlotte* | 2A Putnam* | 3A Clayton | |
3B Sutter | 5B Lincoln | 2A Citrus* | 2A Santa Rosa* | 2A Clinch* | |
3B Tehama | 5B Logan | 2A Clay* | 2A Sarasota* | 3A Cobb | |
4B Trinity | 5B Mesa | 2A Collier* | 2A Seminole* | 3A Coffee* | |
3B Tulare | 7 Mineral | 2A Columbia* | 2A St. Johns* | 2A Colquitt* | |
4B Tuolumne | 6B Moffat | 2A DeSoto* | 2A St. Lucie* | 3A Columbia | |
3C Ventura | 5B Montezuma | 2A Dixie* | 2A Sumter* | 2A Cook* | |
3B Yolo | 5B Montrose | 2A Duval* | 2A Suwannee* | 3A Coweta |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
3A Crawford | 2A Lanier* | 3A Taylor* | 5B Cassia | 4A Crawford | |
3A Crisp* | 3A Laurens* | 3A Telfair* | 6B Clark | 5A Cumberland | |
4A Dade | 3A Lee* | 3A Terrell* | 5B Clearwater | 5A DeKalb | |
4A Dawson | 2A Liberty* | 2A Thomas* | 6B Custer | 5A De Witt | |
2A Decatur* | 3A Lincoln | 3A Tift* | 5B Elmore | 5A Douglas | |
3A DeKalb | 2A Long* | 2A Toombs* | 6B Franklin | 5A DuPage | |
3A Dodge* | 2A Lowndes* | 4A Towns | 6B Fremont | 5A Edgar | |
3A Dooly* | 4A Lumpkin | 3A Treutlen* | 5B Gem | 4A Edwards | |
3A Dougherty* | 3A Macon* | 3A Troup | 5B Gooding | 4A Effingham | |
3A Douglas | 3A Madison | 3A Turner* | 5B Idaho | 4A Fayette | |
3A Early* | 3A Marion* | 3A Twiggs* | 6B Jefferson | 5A Ford | |
2A Echols* | 3A McDuffie | 4A Union | 5B Jerome | 4A Franklin | |
2A Effingham* | 2A McIntosh* | 3A Upson | 5B Kootenai | 5A Fulton | |
3A Elbert | 3A Meriwether | 4A Walker | 5B Latah | 4A Gallatin | |
3A Emanuel* | 2A Miller* | 3A Walton | 6B Lemhi | 5A Greene | |
2A Evans* | 2A Mitchell* | 2A Ware* | 5B Lewis | 5A Grundy | |
4A Fannin | 3A Monroe | 3A Warren | 5B Lincoln | 4A Hamilton | |
3A Fayette | 3A Montgomery* | 3A Washington | 6B Madison | 5A Hancock | |
4A Floyd | 3A Morgan | 2A Wayne* | 5B Minidoka | 4A Hardin | |
3A Forsyth | 4A Murray | 3A Webster* | 5B Nez Perce | 5A Henderson | |
4A Franklin | 3A Muscogee | 3A Wheeler* | 6B Oneida | 5A Henry | |
3A Fulton | 3A Newton | 4A White | 5B Owyhee | 5A Iroquois | |
4A Gilmer | 3A Oconee | 4A Whitfield | 5B Payette | 4A Jackson | |
3A Glascock | 3A Oglethorpe | 3A Wilcox* | 5B Power | 4A Jasper | |
2A Glynn* | 3A Paulding | 3A Wilkes | 5B Shoshone | 4A Jefferson | |
4A Gordon | 3A Peach* | 3A Wilkinson | 6B Teton | 5A Jersey | |
2A Grady* | 4A Pickens | 3A Worth* | 5B Twin Falls | 5A Jo Daviess | |
3A Greene | 2A Pierce* | HAWAII | 6B Valley | 4A Johnson | |
3A Gwinnett | 3A Pike | 5B Washington | 5A Kane | ||
4A Habersham | 3A Polk | 1A (all)* | ILLINOIS | 5A Kankakee | |
4A Hall | 3A Pulaski* | IDAHO | 5A Kendall | ||
3A Hancock | 3A Putnam | 5A Adams | 5A Knox | ||
3A Haralson | 3A Quitman* | 5B Ada | 4A Alexander | 5A Lake | |
3A Harris | 4A Rabun | 6B Adams | 4A Bond | 5A La Salle | |
3A Hart | 3A Randolph* | 6B Bannock | 5A Boone | 4A Lawrence | |
3A Heard | 3A Richmond | 6B Bear Lake | 5A Brown | 5A Lee | |
3A Henry | 3A Rockdale | 5B Benewah | 5A Bureau | 5A Livingston | |
3A Houston* | 3A Schley* | 6B Bingham | 5A Calhoun | 5A Logan | |
3A Irwin* | 3A Screven* | 6B Blaine | 5A Carroll | 5A Macon | |
3A Jackson | 2A Seminole* | 6B Boise | 5A Cass | 4A Macoupin | |
3A Jasper | 3A Spalding | 6B Bonner | 5A Champaign | 4A Madison | |
2A Jeff Davis* | 4A Stephens | 6B Bonneville | 4A Christian | 4A Marion | |
3A Jefferson | 3A Stewart* | 6B Boundary | 5A Clark | 5A Marshall | |
3A Jenkins* | 3A Sumter* | 6B Butte | 4A Clay | 5A Mason | |
3A Johnson* | 3A Talbot | 6B Camas | 4A Clinton | 4A Massac | |
3A Jones | 3A Taliaferro | 5B Canyon | 5A Coles | 5A McDonough | |
3A Lamar | 2A Tattnall* | 6B Caribou | 5A Cook | 5A McHenry |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
5A McLean | 5A Boone | 5A Miami | 5A Appanoose | 5A Jasper | |
5A Menard | 4A Brown | 4A Monroe | 5A Audubon | 5A Jefferson | |
5A Mercer | 5A Carroll | 5A Montgomery | 5A Benton | 5A Johnson | |
4A Monroe | 5A Cass | 5A Morgan | 6A Black Hawk | 5A Jones | |
4A Montgomery | 4A Clark | 5A Newton | 5A Boone | 5A Keokuk | |
5A Morgan | 5A Clay | 5A Noble | 6A Bremer | 6A Kossuth | |
5A Moultrie | 5A Clinton | 4A Ohio | 6A Buchanan | 5A Lee | |
5A Ogle | 4A Crawford | 4A Orange | 6A Buena Vista | 5A Linn | |
5A Peoria | 4A Daviess | 5A Owen | 6A Butler | 5A Louisa | |
4A Perry | 4A Dearborn | 5A Parke | 6A Calhoun | 5A Lucas | |
5A Piatt | 5A Decatur | 4A Perry | 5A Carroll | 6A Lyon | |
5A Pike | 5A De Kalb | 4A Pike | 5A Cass | 5A Madison | |
4A Pope | 5A Delaware | 5A Porter | 5A Cedar | 5A Mahaska | |
4A Pulaski | 4A Dubois | 4A Posey | 6A Cerro Gordo | 5A Marion | |
5A Putnam | 5A Elkhart | 5A Pulaski | 6A Cherokee | 5A Marshall | |
4A Randolph | 5A Fayette | 5A Putnam | 6A Chickasaw | 5A Mills | |
4A Richland | 4A Floyd | 5A Randolph | 5A Clarke | 6A Mitchell | |
5A Rock Island | 5A Fountain | 4A Ripley | 6A Clay | 5A Monona | |
4A Saline | 5A Franklin | 5A Rush | 6A Clayton | 5A Monroe | |
5A Sangamon | 5A Fulton | 4A Scott | 5A Clinton | 5A Montgomery | |
5A Schuyler | 4A Gibson | 5A Shelby | 5A Crawford | 5A Muscatine | |
5A Scott | 5A Grant | 4A Spencer | 5A Dallas | 6A O’Brien | |
4A Shelby | 4A Greene | 5A Starke | 5A Davis | 6A Osceola | |
5A Stark | 5A Hamilton | 5A Steuben | 5A Decatur | 5A Page | |
4A St. Clair | 5A Hancock | 5A St. Joseph | 6A Delaware | 6A Palo Alto | |
5A Stephenson | 4A Harrison | 4A Sullivan | 5A Des Moines | 6A Plymouth | |
5A Tazewell | 5A Hendricks | 4A Switzerland | 6A Dickinson | 6A Pocahontas | |
4A Union | 5A Henry | 5A Tippecanoe | 5A Dubuque | 5A Polk | |
5A Vermilion | 5A Howard | 5A Tipton | 6A Emmet | 5A Pottawattamie | |
4A Wabash | 5A Huntington | 5A Union | 6A Fayette | 5A Poweshiek | |
5A Warren | 4A Jackson | 4A Vanderburgh | 6A Floyd | 5A Ringgold | |
4A Washington | 5A Jasper | 5A Vermillion | 6A Franklin | 6A Sac | |
4A Wayne | 5A Jay | 5A Vigo | 5A Fremont | 5A Scott | |
4A White | 4A Jefferson | 5A Wabash | 5A Greene | 5A Shelby | |
5A Whiteside | 4A Jennings | 5A Warren | 6A Grundy | 6A Sioux | |
5A Will | 5A Johnson | 4A Warrick | 5A Guthrie | 5A Story | |
4A Williamson | 4A Knox | 4A Washington | 6A Hamilton | 5A Tama | |
5A Winnebago | 5A Kosciusko | 5A Wayne | 6A Hancock | 5A Taylor | |
5A Woodford | 5A Lagrange | 5A Wells | 6A Hardin | 5A Union | |
INDIANA | 5A Lake | 5A White | 5A Harrison | 5A Van Buren | |
5A La Porte | 5A Whitley | 5A Henry | 5A Wapello | ||
5A Adams | 4A Lawrence | IOWA | 6A Howard | 5A Warren | |
5A Allen | 5A Madison | 6A Humboldt | 5A Washington | ||
5A Bartholomew | 5A Marion | 5A Adair | 6A Ida | 5A Wayne | |
5A Benton | 5A Marshall | 5A Adams | 5A Iowa | 6A Webster | |
5A Blackford | 4A Martin | 6A Allamakee | 5A Jackson | 6A Winnebago |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
6A Winneshiek | 4A Hodgeman | 4A Seward | 2A Iberville* | 6A Cumberland | |
5A Woodbury | 4A Jackson | 4A Shawnee | 3A Jackson* | 6A Franklin | |
6A Worth | 4A Jefferson | 5A Sheridan | 2A Jefferson* | 6A Hancock | |
6A Wright | 5A Jewell | 5A Sherman | 2A Jefferson Davis | 6A Kennebec | |
KANSAS | 4A Johnson | 5A Smith | 2A Lafayette* | 6A Knox | |
4A Kearny | 4A Stafford | 2A Lafourche* | 6A Lincoln | ||
4A Allen | 4A Kingman | 4A Stanton | 3A La Salle* | 6A Oxford | |
4A Anderson | 4A Kiowa | 4A Stevens | 3A Lincoln* | 6A Penobscot | |
4A Atchison | 4A Labette | 4A Sumner | 2A Livingston* | 6A Piscataquis | |
4A Barber | 5A Lane | 5A Thomas | 3A Madison* | 6A Sagadahoc | |
4A Barton | 4A Leavenworth | 5A Trego | 3A Morehouse | 6A Somerset | |
4A Bourbon | 4A Lincoln | 4A Wabaunsee | 3A Natchitoches* | 6A Waldo | |
4A Brown | 4A Linn | 5A Wallace | 2A Orleans* | 6A Washington | |
4A Butler | 5A Logan | 4A Washington | 3A Ouachita* | 6A York | |
4A Chase | 4A Lyon | 5A Wichita | 2A Plaquemines* | MARYLAND | |
4A Chautauqua | 4A Marion | 4A Wilson | 2A Pointe Coupee* | ||
4A Cherokee | 4A Marshall | 4A Woodson | 2A Rapides* | 4A Allegany | |
5A Cheyenne | 4A McPherson | 4A Wyandotte | 3A Red River* | 4A Anne Arundel | |
4A Clark | 4A Meade | KENTUCKY | 3A Richland* | 4A Baltimore | |
4A Clay | 4A Miami | 3A Sabine* | 4A Baltimore (city) | ||
5A Cloud | 5A Mitchell | 4A (all) | 2A St. Bernard* | 4A Calvert | |
4A Coffey | 4A Montgomery | LOUISIANA | 2A St. Charles* | 4A Caroline | |
4A Comanche | 4A Morris | 2A St. Helena* | 4A Carroll | ||
4A Cowley | 4A Morton | 2A Acadia* | 2A St. James* | 4A Cecil | |
4A Crawford | 4A Nemaha | 2A Allen* | 2A St. John the | 4A Charles | |
5A Decatur | 4A Neosho | 2A Ascension* | Baptist* | 4A Dorchester | |
4A Dickinson | 5A Ness | 2A Assumption* | 2A St. Landry* | 4A Frederick | |
4A Doniphan | 5A Norton | 2A Avoyelles* | 2A St. Martin* | 5A Garrett | |
4A Douglas | 4A Osage | 2A Beauregard* | 2A St. Mary* | 4A Harford | |
4A Edwards | 5A Osborne | 3A Bienville* | 2A St. Tammany* | 4A Howard | |
4A Elk | 4A Ottawa | 3A Bossier* | 2A Tangipahoa* | 4A Kent | |
5A Ellis | 4A Pawnee | 3A Caddo* | 3A Tensas* | 4A Montgomery | |
4A Ellsworth | 5A Phillips | 2A Calcasieu* | 2A Terrebonne* | 4A Prince George's | |
4A Finney | 4A Pottawatomie | 3A Caldwell* | 3A Union* | 4A Queen Anne's | |
4A Ford | 4A Pratt | 2A Cameron* | 2A Vermilion* | 4A Somerset | |
4A Franklin | 5A Rawlins | 3A Catahoula* | 3A Vernon* | 4A St. Mary's | |
4A Geary | 4A Reno | 3A Claiborne* | 2A Washington* | 4A Talbot | |
5A Gove | 5A Republic | 3A Concordia* | 3A Webster* | 4A Washington | |
5A Graham | 4A Rice | 3A De Soto* | 2A West Baton | 4A Wicomico | |
4A Grant | 4A Riley | 2A East Baton | Rouge* | 4A Worcester | |
4A Gray | 5A Rooks | Rouge* | 3A West Carroll | MASSACHSETTS | |
5A Greeley | 4A Rush | 3A East Carroll | 2A West Feliciana* | ||
4A Greenwood | 4A Russell | 2A East Feliciana* | 3A Winn* | 5A (all) | |
5A Hamilton | 4A Saline | 2A Evangeline* | MAINE | MICHIGAN | |
4A Harper | 5A Scott | 3A Franklin* | |||
4A Harvey | 4A Sedgwick | 3A Grant* | 6A Androscoggin | 6A Alcona | |
4A Haskell | 2A Iberia* | 7 Aroostook | 6A Alger |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
5A Allegan | 7 Mackinac | 6A Carver | 7 Otter Tail | 3A Clay | |
6A Alpena | 5A Macomb | 7 Cass | 7 Pennington | 3A Coahoma | |
6A Antrim | 6A Manistee | 6A Chippewa | 7 Pine | 3A Copiah* | |
6A Arenac | 6A Marquette | 6A Chisago | 6A Pipestone | 3A Covington* | |
7 Baraga | 6A Mason | 7 Clay | 7 Polk | 3A DeSoto | |
5A Barry | 6A Mecosta | 7 Clearwater | 6A Pope | 3A Forrest* | |
5A Bay | 6A Menominee | 7 Cook | 6A Ramsey | 3A Franklin* | |
6A Benzie | 5A Midland | 6A Cottonwood | 7 Red Lake | 3A George* | |
5A Berrien | 6A Missaukee | 7 Crow Wing | 6A Redwood | 3A Greene* | |
5A Branch | 5A Monroe | 6A Dakota | 6A Renville | 3A Grenada | |
5A Calhoun | 5A Montcalm | 6A Dodge | 6A Rice | 2A Hancock* | |
5A Cass | 6A Montmorency | 6A Douglas | 6A Rock | 2A Harrison* | |
6A Charlevoix | 5A Muskegon | 6A Faribault | 7 Roseau | 3A Hinds* | |
6A Cheboygan | 6A Newaygo | 6A Fillmore | 6A Scott | 3A Holmes | |
7 Chippewa | 5A Oakland | 6A Freeborn | 6A Sherburne | 3A Humphreys | |
6A Clare | 6A Oceana | 6A Goodhue | 6A Sibley | 3A Issaquena | |
5A Clinton | 6A Ogemaw | 7 Grant | 6A Stearns | 3A Itawamba | |
6A Crawford | 7 Ontonagon | 6A Hennepin | 6A Steele | 2A Jackson* | |
6A Delta | 6A Osceola | 6A Houston | 6A Stevens | 3A Jasper | |
6A Dickinson | 6A Oscoda | 7 Hubbard | 7 St. Louis | 3A Jefferson* | |
5A Eaton | 6A Otsego | 6A Isanti | 6A Swift | 3A Jefferson Davis* | |
6A Emmet | 5A Ottawa | 7 Itasca | 6A Todd | 3A Jones* | |
5A Genesee | 6A Presque Isle | 6A Jackson | 6A Traverse | 3A Kemper | |
6A Gladwin | 6A Roscommon | 7 Kanabec | 6A Wabasha | 3A Lafayette | |
7 Gogebic | 5A Saginaw | 6A Kandiyohi | 7 Wadena | 3A Lamar* | |
6A Grand Traverse | 6A Sanilac | 7 Kittson | 6A Waseca | 3A Lauderdale | |
5A Gratiot | 7 Schoolcraft | 7 Koochiching | 6A Washington | 3A Lawrence* | |
5A Hillsdale | 5A Shiawassee | 6A Lac qui Parle | 6A Watonwan | 3A Leake | |
7 Houghton | 5A St. Clair | 7 Lake | 7 Wilkin | 3A Lee | |
6A Huron | 5A St. Joseph | 7 Lake of the Woods | 6A Winona | 3A Leflore | |
5A Ingham | 5A Tuscola | 6A Le Sueur | 6A Wright | 3A Lincoln* | |
5A Ionia | 5A Van Buren | 6A Lincoln | 6A Yellow Medicine | 3A Lowndes | |
6A Iosco | 5A Washtenaw | 6A Lyon | MISSISSIPPI | 3A Madison | |
7 Iron | 5A Wayne | 7 Mahnomen | 3A Marion* | ||
6A Isabella | 6A Wexford | 7 Marshall | 3A Adams* | 3A Marshall | |
5A Jackson | MINNESOTA | 6A Martin | 3A Alcorn | 3A Monroe | |
5A Kalamazoo | 6A McLeod | 3A Amite* | 3A Montgomery | ||
6A Kalkaska | 7 Aitkin | 6A Meeker | 3A Attala | 3A Neshoba | |
5A Kent | 6A Anoka | 7 Mille Lacs | 3A Benton | 3A Newton | |
7 Keweenaw | 7 Becker | 6A Morrison | 3A Bolivar | 3A Noxubee | |
6A Lake | 7 Beltrami | 6A Mower | 3A Calhoun | 3A Oktibbeha | |
5A Lapeer | 6A Benton | 6A Murray | 3A Carroll | 3A Panola | |
6A Leelanau | 6A Big Stone | 6A Nicollet | 3A Chickasaw | 2A Pearl River* | |
5A Lenawee | 6A Blue Earth | 6A Nobles | 3A Choctaw | 3A Perry* | |
5A Livingston | 6A Brown | 7 Norman | 3A Claiborne* | 3A Pike* | |
7 Luce | 7 Carlton | 6A Olmsted | 3A Clarke |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
3A Pontotoc | 5A Chariton | 4A Mississippi | 4A Webster | 4A Cumberland | |
3A Prentiss | 4A Christian | 4A Moniteau | 5A Worth | 4A Essex | |
3A Quitman | 5A Clark | 4A Monroe | 4A Wright | 4A Gloucester | |
3A Rankin* | 4A Clay | 4A Montgomery | MONTANA | 4A Hudson | |
3A Scott | 5A Clinton | 4A Morgan | 5A Hunterdon | ||
3A Sharkey | 4A Cole | 4A New Madrid | 6B (all) | 5A Mercer | |
3A Simpson* | 4A Cooper | 4A Newton | NEBRASKA | 4A Middlesex | |
3A Smith* | 4A Crawford | 5A Nodaway | 4A Monmouth | ||
2A Stone* | 4A Dade | 4A Oregon | 5A (all) | 5A Morris | |
3A Sunflower | 4A Dallas | 4A Osage | NEVADA | 4A Ocean | |
3A Tallahatchie | 5A Daviess | 4A Ozark | 5A Passaic | ||
3A Tate | 5A DeKalb | 4A Pemiscot | 5B Carson City (city) | 4A Salem | |
3A Tippah | 4A Dent | 4A Perry | 5B Churchill | 5A Somerset | |
3A Tishomingo | 4A Douglas | 4A Pettis | 3B Clark | 5A Sussex | |
3A Tunica | 4A Dunklin | 4A Phelps | 5B Douglas | 4A Union | |
3A Union | 4A Franklin | 5A Pike | 5B Elko | 5A Warren | |
3A Walthall* | 4A Gasconade | 4A Platte | 5B Esmeralda | NEW MEXICO | |
3A Warren* | 5A Gentry | 4A Polk | 5B Eureka | ||
3A Washington | 4A Greene | 4A Pulaski | 5B Humboldt | 4B Bernalillo | |
3A Wayne* | 5A Grundy | 5A Putnam | 5B Lander | 5B Catron | |
3A Webster | 5A Harrison | 5A Ralls | 5B Lincoln | 3B Chaves | |
3A Wilkinson* | 4A Henry | 4A Randolph | 5B Lyon | 4B Cibola | |
3A Winston | 4A Hickory | 4A Ray | 5B Mineral | 5B Colfax | |
3A Yalobusha | 5A Holt | 4A Reynolds | 5B Nye | 4B Curry | |
3A Yazoo | 4A Howard | 4A Ripley | 5B Pershing | 4B DeBaca | |
MISSOURI | 4A Howell | 4A Saline | 5B Storey | 3B Dona Ana | |
4A Iron | 5A Schuyler | 5B Washoe | 3B Eddy | ||
5A Adair | 4A Jackson | 5A Scotland | 5B White Pine | 4B Grant | |
5A Andrew | 4A Jasper | 4A Scott | NEW HAMPSHIRE | 4B Guadalupe | |
5A Atchison | 4A Jefferson | 4A Shannon | 5B Harding | ||
4A Audrain | 4A Johnson | 5A Shelby | 6A Belknap | 3B Hidalgo | |
4A Barry | 5A Knox | 4A St. Charles | 6A Carroll | 3B Lea | |
4A Barton | 4A Laclede | 4A St. Clair | 5A Cheshire | 4B Lincoln | |
4A Bates | 4A Lafayette | 4A Ste. Genevieve | 6A Coos | 5B Los Alamos | |
4A Benton | 4A Lawrence | 4A St. Francois | 6A Grafton | 3B Luna | |
4A Bollinger | 5A Lewis | 4A St. Louis | 5A Hillsborough | 5B McKinley | |
4A Boone | 4A Lincoln | 4A St. Louis (city) | 6A Merrimack | 5B Mora | |
5A Buchanan | 5A Linn | 4A Stoddard | 5A Rockingham | 3B Otero | |
4A Butler | 5A Livingston | 4A Stone | 5A Strafford | 4B Quay | |
5A Caldwell | 5A Macon | 5A Sullivan | 6A Sullivan | 5B Rio Arriba | |
4A Callaway | 4A Madison | 4A Taney | NEW JERSEY | 4B Roosevelt | |
4A Camden | 4A Maries | 4A Texas | 5B Sandoval | ||
4A Cape Girardeau | 5A Marion | 4A Vernon | 4A Atlantic | 5B San Juan | |
4A Carroll | 4A McDonald | 4A Warren | 5A Bergen | 5B San Miguel | |
4A Carter | 5A Mercer | 4A Washington | 4A Burlington | 5B Santa Fe | |
4A Cass | 4A Miller | 4A Wayne | 4A Camden | 4B Sierra | |
4A Cedar | 4A Cape May | 4B Socorro |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
5B Taos | 4A Queens | 4A Clay | 4A Orange | 7 Divide | |
5B Torrance | 5A Rensselaer | 4A Cleveland | 3A Pamlico | 6A Dunn | |
4B Union | 4A Richmond | 3A Columbus* | 3A Pasquotank | 7 Eddy | |
4B Valencia | 5A Rockland | 3A Craven | 3A Pender* | 6A Emmons | |
NEW YORK | 5A Saratoga | 3A Cumberland | 3A Perquimans | 7 Foster | |
5A Schenectady | 3A Currituck | 4A Person | 6A Golden Valley | ||
5A Albany | 6A Schoharie | 3A Dare | 3A Pitt | 7 Grand Forks | |
6A Allegany | 6A Schuyler | 3A Davidson | 4A Polk | 6A Grant | |
4A Bronx | 5A Seneca | 4A Davie | 3A Randolph | 7 Griggs | |
6A Broome | 6A Steuben | 3A Duplin | 3A Richmond | 6A Hettinger | |
6A Cattaraugus | 6A St. Lawrence | 4A Durham | 3A Robeson | 7 Kidder | |
5A Cayuga | 4A Suffolk | 3A Edgecombe | 4A Rockingham | 6A LaMoure | |
5A Chautauqua | 6A Sullivan | 4A Forsyth | 3A Rowan | 6A Logan | |
5A Chemung | 5A Tioga | 4A Franklin | 4A Rutherford | 7 McHenry | |
6A Chenango | 6A Tompkins | 3A Gaston | 3A Sampson | 6A McIntosh | |
6A Clinton | 6A Ulster | 4A Gates | 3A Scotland | 6A McKenzie | |
5A Columbia | 6A Warren | 4A Graham | 3A Stanly | 7 McLean | |
5A Cortland | 5A Washington | 4A Granville | 4A Stokes | 6A Mercer | |
6A Delaware | 5A Wayne | 3A Greene | 4A Surry | 6A Morton | |
5A Dutchess | 4A Westchester | 4A Guilford | 4A Swain | 7 Mountrail | |
5A Erie | 6A Wyoming | 4A Halifax | 4A Transylvania | 7 Nelson | |
6A Essex | 5A Yates | 4A Harnett | 3A Tyrrell | 6A Oliver | |
6A Franklin | NORTH CAROLINA | 4A Haywood | 3A Union | 7 Pembina | |
6A Fulton | 4A Henderson | 4A Vance | 7 Pierce | ||
5A Genesee | 4A Alamance | 4A Hertford | 4A Wake | 7 Ramsey | |
5A Greene | 4A Alexander | 3A Hoke | 4A Warren | 6A Ransom | |
6A Hamilton | 5A Alleghany | 3A Hyde | 3A Washington | 7 Renville | |
6A Herkimer | 3A Anson | 4A Iredell | 5A Watauga | 6A Richland | |
6A Jefferson | 5A Ashe | 4A Jackson | 3A Wayne | 7 Rolette | |
4A Kings | 5A Avery | 3A Johnston | 4A Wilkes | 6A Sargent | |
6A Lewis | 3A Beaufort | 3A Jones | 3A Wilson | 7 Sheridan | |
5A Livingston | 4A Bertie | 4A Lee | 4A Yadkin | 6A Sioux | |
6A Madison | 3A Bladen | 3A Lenoir | 5A Yancey | 6A Slope | |
5A Monroe | 3A Brunswick* | 4A Lincoln | NORTH DAKOTA | 6A Stark | |
6A Montgomery | 4A Buncombe | 4A Macon | 7 Steele | ||
4A Nassau | 4A Burke | 4A Madison | 6A Adams | 7 Stutsman | |
4A New York | 3A Cabarrus | 3A Martin | 7 Barnes | 7 Towner | |
5A Niagara | 4A Caldwell | 4A McDowell | 7 Benson | 7 Traill | |
6A Oneida | 3A Camden | 3A Mecklenburg | 6A Billings | 7 Walsh | |
5A Onondaga | 3A Carteret* | 5A Mitchell | 7 Bottineau | 7 Ward | |
5A Ontario | 4A Caswell | 3A Montgomery | 6A Bowman | 7 Wells | |
5A Orange | 4A Catawba | 3A Moore | 7 Burke | 7 Williams | |
5A Orleans | 4A Chatham | 4A Nash | 6A Burleigh | OHIO | |
5A Oswego | 4A Cherokee | 3A New Hanover* | 7 Cass | ||
6A Otsego | 3A Chowan | 4A Northampton | 7 Cavalier | 4A Adams | |
5A Putnam | 3A Onslow* | 6A Dickey | 5A Allen |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
5A Ashland | 5A Mahoning | 3A Bryan | 3A Okfuskee | 4C Linn | |
5A Ashtabula | 5A Marion | 3A Caddo | 3A Oklahoma | 5B Malheur | |
5A Athens | 5A Medina | 3A Canadian | 3A Okmulgee | 4C Marion | |
5A Auglaize | 5A Meigs | 3A Carter | 3A Osage | 5B Morrow | |
5A Belmont | 5A Mercer | 3A Cherokee | 3A Ottawa | 4C Multnomah | |
4A Brown | 5A Miami | 3A Choctaw | 3A Pawnee | 4C Polk | |
5A Butler | 5A Monroe | 4B Cimarron | 3A Payne | 5B Sherman | |
5A Carroll | 5A Montgomery | 3A Cleveland | 3A Pittsburg | 4C Tillamook | |
5A Champaign | 5A Morgan | 3A Coal | 3A Pontotoc | 5B Umatilla | |
5A Clark | 5A Morrow | 3A Comanche | 3A Pottawatomie | 5B Union | |
4A Clermont | 5A Muskingum | 3A Cotton | 3A Pushmataha | 5B Wallowa | |
5A Clinton | 5A Noble | 3A Craig | 3A Roger Mills | 5B Wasco | |
5A Columbiana | 5A Ottawa | 3A Creek | 3A Rogers | 4C Washington | |
5A Coshocton | 5A Paulding | 3A Custer | 3A Seminole | 5B Wheeler | |
5A Crawford | 5A Perry | 3A Delaware | 3A Sequoyah | 4C Yamhill | |
5A Cuyahoga | 5A Pickaway | 3A Dewey | 3A Stephens | PENNSYLVANIA | |
5A Darke | 4A Pike | 3A Ellis | 4B Texas | ||
5A Defiance | 5A Portage | 3A Garfield | 3A Tillman | 5A Adams | |
5A Delaware | 5A Preble | 3A Garvin | 3A Tulsa | 5A Allegheny | |
5A Erie | 5A Putnam | 3A Grady | 3A Wagoner | 5A Armstrong | |
5A Fairfield | 5A Richland | 3A Grant | 3A Washington | 5A Beaver | |
5A Fayette | 5A Ross | 3A Greer | 3A Washita | 5A Bedford | |
5A Franklin | 5A Sandusky | 3A Harmon | 3A Woods | 5A Berks | |
5A Fulton | 4A Scioto | 3A Harper | 3A Woodward | 5A Blair | |
4A Gallia | 5A Seneca | 3A Haskell | OREGON | 5A Bradford | |
5A Geauga | 5A Shelby | 3A Hughes | 4A Bucks | ||
5A Greene | 5A Stark | 3A Jackson | 5B Baker | 5A Butler | |
5A Guernsey | 5A Summit | 3A Jefferson | 4C Benton | 5A Cambria | |
4A Hamilton | 5A Trumbull | 3A Johnston | 4C Clackamas | 6A Cameron | |
5A Hancock | 5A Tuscarawas | 3A Kay | 4C Clatsop | 5A Carbon | |
5A Hardin | 5A Union | 3A Kingfisher | 4C Columbia | 5A Centre | |
5A Harrison | 5A Van Wert | 3A Kiowa | 4C Coos | 4A Chester | |
5A Henry | 5A Vinton | 3A Latimer | 5B Crook | 5A Clarion | |
5A Highland | 5A Warren | 3A Le Flore | 4C Curry | 6A Clearfield | |
5A Hocking | 4A Washington | 3A Lincoln | 5B Deschutes | 5A Clinton | |
5A Holmes | 5A Wayne | 3A Logan | 4C Douglas | 5A Columbia | |
5A Huron | 5A Williams | 3A Love | 5B Gilliam | 5A Crawford | |
5A Jackson | 5A Wood | 3A Major | 5B Grant | 5A Cumberland | |
5A Jefferson | 5A Wyandot | 3A Marshall | 5B Harney | 5A Dauphin | |
5A Knox | OKLAHOMA | 3A Mayes | 5B Hood River | 4A Delaware | |
5A Lake | 3A McClain | 4C Jackson | 6A Elk | ||
4A Lawrence | 3A Adair | 3A McCurtain | 5B Jefferson | 5A Erie | |
5A Licking | 3A Alfalfa | 3A McIntosh | 4C Josephine | 5A Fayette | |
5A Logan | 3A Atoka | 3A Murray | 5B Klamath | 5A Forest | |
5A Lorain | 4B Beaver | 3A Muskogee | 5B Lake | 5A Franklin | |
5A Lucas | 3A Beckham | 3A Noble | 4C Lane | 5A Fulton | |
5A Madison | 3A Blaine | 3A Nowata | 4C Lincoln | 5A Greene |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
5A Huntingdon | 3A Bamberg* | 5A Bennett | 6A Minnehaha | 4A Gibson | |
5A Indiana | 3A Barnwell* | 5A Bon Homme | 6A Moody | 4A Giles | |
5A Jefferson | 3A Beaufort* | 6A Brookings | 6A Pennington | 4A Grainger | |
5A Juniata | 3A Berkeley* | 6A Brown | 6A Perkins | 4A Greene | |
5A Lackawanna | 3A Calhoun | 6A Brule | 6A Potter | 4A Grundy | |
5A Lancaster | 3A Charleston* | 6A Buffalo | 6A Roberts | 4A Hamblen | |
5A Lawrence | 3A Cherokee | 6A Butte | 6A Sanborn | 4A Hamilton | |
5A Lebanon | 3A Chester | 6A Campbell | 6A Shannon | 4A Hancock | |
5A Lehigh | 3A Chesterfield | 5A Charles Mix | 6A Spink | 3A Hardeman | |
5A Luzerne | 3A Clarendon | 6A Clark | 6A Stanley | 3A Hardin | |
5A Lycoming | 3A Colleton* | 5A Clay | 6A Sully | 4A Hawkins | |
6A McKean | 3A Darlington | 6A Codington | 5A Todd | 3A Haywood | |
5A Mercer | 3A Dillon | 6A Corson | 5A Tripp | 3A Henderson | |
5A Mifflin | 3A Dorchester* | 6A Custer | 6A Turner | 4A Henry | |
5A Monroe | 3A Edgefield | 6A Davison | 5A Union | 4A Hickman | |
4A Montgomery | 3A Fairfield | 6A Day | 6A Walworth | 4A Houston | |
5A Montour | 3A Florence | 6A Deuel | 5A Yankton | 4A Humphreys | |
5A Northampton | 3A Georgetown* | 6A Dewey | 6A Ziebach | 4A Jackson | |
5A Northumberland | 3A Greenville | 5A Douglas | TENNESSEE | 4A Jefferson | |
5A Perry | 3A Greenwood | 6A Edmunds | 4A Johnson | ||
4A Philadelphia | 3A Hampton* | 6A Fall River | 4A Anderson | 4A Knox | |
5A Pike | 3A Horry* | 6A Faulk | 4A Bedford | 3A Lake | |
6A Potter | 3A Jasper* | 6A Grant | 4A Benton | 3A Lauderdale | |
5A Schuylkill | 3A Kershaw | 5A Gregory | 4A Bledsoe | 4A Lawrence | |
5A Snyder | 3A Lancaster | 6A Haakon | 4A Blount | 4A Lewis | |
5A Somerset | 3A Laurens | 6A Hamlin | 4A Bradley | 4A Lincoln | |
5A Sullivan | 3A Lee | 6A Hand | 4A Campbell | 4A Loudon | |
6A Susquehanna | 3A Lexington | 6A Hanson | 4A Cannon | 4A Macon | |
6A Tioga | 3A Marion | 6A Harding | 4A Carroll | 3A Madison | |
5A Union | 3A Marlboro | 6A Hughes | 4A Carter | 4A Marion | |
5A Venango | 3A McCormick | 5A Hutchinson | 4A Cheatham | 4A Marshall | |
5A Warren | 3A Newberry | 6A Hyde | 3A Chester | 4A Maury | |
5A Washington | 3A Oconee | 5A Jackson | 4A Claiborne | 4A McMinn | |
6A Wayne | 3A Orangeburg | 6A Jerauld | 4A Clay | 3A McNairy | |
5A Westmoreland | 3A Pickens | 6A Jones | 4A Cocke | 4A Meigs | |
5A Wyoming | 3A Richland | 6A Kingsbury | 4A Coffee | 4A Monroe | |
4A York | 3A Saluda | 6A Lake | 3A Crockett | 4A Montgomery | |
RHODE ISLAND | 3A Spartanburg | 6A Lawrence | 4A Cumberland | 4A Moore | |
3A Sumter | 6A Lincoln | 4A Davidson | 4A Morgan | ||
5A (all) | 3A Union | 6A Lyman | 4A Decatur | 4A Obion | |
SOUTH CAROLINA | 3A Williamsburg | 6A Marshall | 4A DeKalb | 4A Overton | |
3A York | 6A McCook | 4A Dickson | 4A Perry | ||
3A Abbeville | SOUTH DAKOTA | 6A McPherson | 3A Dyer | 4A Pickett | |
3A Aiken | 6A Meade | 3A Fayette | 4A Polk | ||
3A Allendale* | 6A Aurora | 5A Mellette | 4A Fentress | 4A Putnam | |
3A Anderson | 6A Beadle | 6A Miner | 4A Franklin | 4A Rhea |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
4A Roane | 3B Brewster | 3B Ector | 3B Howard | 3B McCulloch | |
4A Robertson | 4B Briscoe | 2B Edwards* | 3B Hudspeth | 2A McLennan* | |
4A Rutherford | 2A Brooks* | 3A Ellis* | 3A Hunt* | 2A McMullen* | |
4A Scott | 3A Brown* | 3B El Paso | 4B Hutchinson | 2B Medina* | |
4A Sequatchie | 2A Burleson* | 3A Erath* | 3B Irion | 3B Menard | |
4A Sevier | 3A Burnet* | 2A Falls* | 3A Jack | 3B Midland | |
3A Shelby | 2A Caldwell* | 3A Fannin | 2A Jackson* | 2A Milam* | |
4A Smith | 2A Calhoun* | 2A Fayette* | 2A Jasper* | 3A Mills* | |
4A Stewart | 3B Callahan | 3B Fisher | 3B Jeff Davis | 3B Mitchell | |
4A Sullivan | 2A Cameron* | 4B Floyd | 2A Jefferson* | 3A Montague | |
4A Sumner | 3A Camp* | 3B Foard | 2A Jim Hogg* | 2A Montgomery* | |
3A Tipton | 4B Carson | 2A Fort Bend* | 2A Jim Wells* | 4B Moore | |
4A Trousdale | 3A Cass* | 3A Franklin* | 3A Johnson* | 3A Morris* | |
4A Unicoi | 4B Castro | 2A Freestone* | 3B Jones | 3B Motley | |
4A Union | 2A Chambers* | 2B Frio* | 2A Karnes* | 3A Nacogdoches* | |
4A Van Buren | 2A Cherokee* | 3B Gaines | 3A Kaufman* | 3A Navarro* | |
4A Warren | 3B Childress | 2A Galveston* | 3A Kendall* | 2A Newton* | |
4A Washington | 3A Clay | 3B Garza | 2A Kenedy* | 3B Nolan | |
4A Wayne | 4B Cochran | 3A Gillespie* | 3B Kent | 2A Nueces* | |
4A Weakley | 3B Coke | 3B Glasscock | 3B Kerr | 4B Ochiltree | |
4A White | 3B Coleman | 2A Goliad* | 3B Kimble | 4B Oldham | |
4A Williamson | 3A Collin* | 2A Gonzales* | 3B King | 2A Orange* | |
4A Wilson | 3B Collingsworth | 4B Gray | 2B Kinney* | 3A Palo Pinto* | |
TEXAS | 2A Colorado* | 3A Grayson | 2A Kleberg* | 3A Panola* | |
2A Comal* | 3A Gregg* | 3B Knox | 3A Parker* | ||
2A Anderson* | 3A Comanche* | 2A Grimes* | 3A Lamar* | 4B Parmer | |
3B Andrews | 3B Concho | 2A Guadalupe* | 4B Lamb | 3B Pecos | |
2A Angelina* | 3A Cooke | 4B Hale | 3A Lampasas* | 2A Polk* | |
2A Aransas* | 2A Coryell* | 3B Hall | 2B La Salle* | 4B Potter | |
3A Archer | 3B Cottle | 3A Hamilton* | 2A Lavaca* | 3B Presidio | |
4B Armstrong | 3B Crane | 4B Hansford | 2A Lee* | 3A Rains* | |
2A Atascosa* | 3B Crockett | 3B Hardeman | 2A Leon* | 4B Randall | |
2A Austin* | 3B Crosby | 2A Hardin* | 2A Liberty* | 3B Reagan | |
4B Bailey | 3B Culberson | 2A Harris* | 2A Limestone* | 2B Real* | |
2B Bandera* | 4B Dallam | 3A Harrison* | 4B Lipscomb | 3A Red River* | |
2A Bastrop* | 3A Dallas* | 4B Hartley | 2A Live Oak* | 3B Reeves | |
3B Baylor | 3B Dawson | 3B Haskell | 3A Llano* | 2A Refugio* | |
2A Bee* | 4B Deaf Smith | 2A Hays* | 3B Loving | 4B Roberts | |
2A Bell* | 3A Delta | 3B Hemphill | 3B Lubbock | 2A Robertson* | |
2A Bexar* | 3A Denton* | 3A Henderson* | 3B Lynn | 3A Rockwall* | |
3A Blanco* | 2A DeWitt* | 2A Hidalgo* | 2A Madison* | 3B Runnels | |
3B Borden | 3B Dickens | 2A Hill* | 3A Marion* | 3A Rusk* | |
2A Bosque* | 2B Dimmit* | 4B Hockley | 3B Martin | 3A Sabine* | |
3A Bowie* | 4B Donley | 3A Hood* | 3B Mason | 3A San Augustine* | |
2A Brazoria* | 2A Duval* | 3A Hopkins* | 2A Matagorda* | 2A San Jacinto* | |
2A Brazos* | 3A Eastland | 2A Houston* | 2B Maverick* | 2A San Patricio* |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
3A San Saba* | 3A Young | 4C Clark | 4A Gilmer | WISCONSIN | |
3B Schleicher | 2B Zapata* | 5B Columbia | 5A Grant | 6A Adams | |
3B Scurry | 2B Zavala* | 4C Cowlitz | 5A Greenbrier | 7 Ashland | |
3B Shackelford | UTAH | 5B Douglas | 5A Hampshire | 6A Barron | |
3A Shelby* | 6B Ferry | 5A Hancock | 7 Bayfield | ||
4B Sherman | 5B Beaver | 5B Franklin | 5A Hardy | 6A Brown | |
3A Smith* | 6B Box Elder | 5B Garfield | 5A Harrison | 6A Buffalo | |
3A Somervell* | 6B Cache | 5B Grant | 4A Jackson | 7 Burnett | |
2A Starr* | 6B Carbon | 4C Grays Harbor | 4A Jefferson | 6A Calumet | |
3A Stephens | 6B Daggett | 4C Island | 4A Kanawha | 6A Chippewa | |
3B Sterling | 5B Davis | 4C Jefferson | 5A Lewis | 6A Clark | |
3B Stonewall | 6B Duchesne | 4C King | 4A Lincoln | 6A Columbia | |
3B Sutton | 5B Emery | 4C Kitsap | 4A Logan | 6A Crawford | |
4B Swisher | 5B Garfield | 5B Kittitas | 5A Marion | 6A Dane | |
3A Tarrant* | 5B Grand | 5B Klickitat | 5A Marshall | 6A Dodge | |
3B Taylor | 5B Iron | 4C Lewis | 4A Mason | 6A Door | |
3B Terrell | 5B Juab | 5B Lincoln | 4A McDowell | 7 Douglas | |
3B Terry | 5B Kane | 4C Mason | 4A Mercer | 6A Dunn | |
3B Throckmorton | 5B Millard | 6B Okanogan | 5A Mineral | 6A Eau Claire | |
3A Titus* | 6B Morgan | 4C Pacific | 4A Mingo | 7 Florence | |
3B Tom Green | 5B Piute | 6B Pend Oreille | 5A Monongalia | 6A Fond du Lac | |
2A Travis* | 6B Rich | 4C Pierce | 4A Monroe | 7 Forest | |
2A Trinity* | 5B Salt Lake | 4C San Juan | 4A Morgan | 6A Grant | |
2A Tyler* | 5B San Juan | 4C Skagit | 5A Nicholas | 6A Green | |
3A Upshur* | 5B Sanpete | 5B Skamania | 5A Ohio | 6A Green Lake | |
3B Upton | 5B Sevier | 4C Snohomish | 5A Pendleton | 6A Iowa | |
2B Uvalde* | 6B Summit | 5B Spokane | 4A Pleasants | 7 Iron | |
2B Val Verde* | 5B Tooele | 6B Stevens | 5A Pocahontas | 6A Jackson | |
3A Van Zandt* | 6B Uintah | 4C Thurston | 5A Preston | 6A Jefferson | |
2A Victoria* | 5B Utah | 4C Wahkiakum | 4A Putnam | 6A Juneau | |
2A Walker* | 6B Wasatch | 5B Walla Walla | 5A Raleigh | 6A Kenosha | |
2A Waller* | 3B Washington | 4C Whatcom | 5A Randolph | 6A Kewaunee | |
3B Ward | 5B Wayne | 5B Whitman | 4A Ritchie | 6A La Crosse | |
2A Washington* | 5B Weber | 5B Yakima | 4A Roane | 6A Lafayette | |
2B Webb* | VERMONT | WEST VIRGINIA | 5A Summers | 7 Langlade | |
2A Wharton* | 5A Taylor | 7 Lincoln | |||
3B Wheeler | 6A (all) | 5A Barbour | 5A Tucker | 6A Manitowoc | |
3A Wichita | VIRGINIA | 4A Berkeley | 4A Tyler | 6A Marathon | |
3B Wilbarger | 4A Boone | 5A Upshur | 6A Marinette | ||
2A Willacy* | 4A (all) | 4A Braxton | 4A Wayne | 6A Marquette | |
2A Williamson* | WASHINGTON | 5A Brooke | 5A Webster | 6A Menominee | |
2A Wilson* | 4A Cabell | 5A Wetzel | 6A Milwaukee | ||
3B Winkler | 5B Adams | 4A Calhoun | 4A Wirt | 6A Monroe | |
3A Wise | 5B Asotin | 4A Clay | 4A Wood | 6A Oconto | |
3A Wood* | 5B Benton | 5A Doddridge | 4A Wyoming | 7 Oneida | |
4B Yoakum | 5B Chelan | 5A Fayette | 6A Outagamie | ||
4C Clallam |
(continued)
TABLE N1101.10 (R301.1)—continued
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID
DESIGNATIONS BY STATE, COUNTY AND TERRITORY
6A Ozaukee | 7 Taylor | 6B Big Horn | 6B Sheridan | NORTHERN MARIANA ISLANDS | |
6A Pepin | 6A Trempealeau | 6B Campbell | 7 Sublette | ||
6A Pierce | 6A Vernon | 6B Carbon | 6B Sweetwater | ||
6A Polk | 7 Vilas | 6B Converse | 7 Teton | 1A (all)* | |
6A Portage | 6A Walworth | 6B Crook | 6B Uinta | PUERTO RICO | |
7 Price | 7 Washburn | 6B Fremont | 6B Washakie | ||
6A Racine | 6A Washington | 5B Goshen | 6B Weston | 1A (all)* | |
6A Richland | 6A Waukesha | 6B Hot Springs | US TERRITORIES | VIRGIN ISLANDS | |
6A Rock | 6A Waupaca | 6B Johnson | |||
6A Rusk | 6A Waushara | 6B Laramie | AMERICAN SAMOA | 1A (all)* | |
6A Sauk | 6A Winnebago | 7 Lincoln | |||
7 Sawyer | 6A Wood | 6B Natrona | 1A (all)* | ||
6A Shawano | WYOMING | 6B Niobrara | GUAM | ||
6A Sheboygan | 6B Park | ||||
6A St. Croix | 6B Albany | 5B Platte | 1A (all)* |
TABLE N1101.10.2(1) [R302.3(1)]
INTERNATIONAL CLIMATE ZONE DEFINITIONS
MAJOR CLIMATE TYPE DEFINITIONS |
Marine (C) Definition—Locations meeting all four criteria: 1. Mean temperature of coldest month between -3°C (27°F) and 18°C (65°F). 2. Warmest month mean < 22°C (72°F). 3. At least four months with mean temperatures over 10°C (50°F). 4. Dry season in summer. The month with the heaviest precipitation in the cold season has at least three times as much precipitation as the month with the least precipitation in the rest of the year. The cold season is October through March in the Northern Hemisphere and April through September in the Southern Hemisphere. |
Dry (B) Definition—Locations meeting the following criteria: Not marine and Pin < 0.44 × (TF - 19.5) [Pcm < 2.0 × (TC + 7) in SI units] where: Pin = Annual precipitation in inches (cm) T = Annual mean temperature in °F (°C) |
Moist (A) Definition—Locations that are not marine and not dry. |
Warm-humid Definition—Moist (A) locations where either of the following wet-bulb temperature conditions shall occur during the warmest six consecutive months of the year: 1. 67°F (19.4°C) or higher for 3,000 or more hours; or 2. 73°F (22.8°C) or higher for 1,500 or more hours. |
TABLE N1101.10.2(2) [R301.3(2)]
INTERNATIONAL CLIMATE ZONE DEFINITIONS
ZONE NUMBER | THERMAL CRITERIA | |
IP Units | SI Units | |
1 | 9000 < CDD50°F | 5000 < CDD10°C |
2 | 6300 < CDD50°F ≤ 9000 | 3500 < CDD10°C ≤ 5000 |
3A and 3B | 4500 < CDD50°F ≤ 6300 AND HDD65°F ≤ 5400 | 2500 < CDD10°C ≤ 3500 AND HDD18°C ≤ 3000 |
4A and 4B | CDD50°F ≤ 4500 AND HDD65°F ≤ 5400 | CDD10°C ≤ 2500 AND HDD18°C ≤ 3000 |
3C | HDD65°F ≤ 3600 | HDD18°C ≤ 2000 |
4C | 3600 < HDD65°F ≤ 5400 | 2000 < HDD18°C ≤ 3000 |
5 | 5400 < HDD65°F ≤ 7200 | 3000 < HDD18°C ≤ 4000 |
6 | 7200 < HDD65°F ≤ 9000 | 4000 < HDD18°C ≤ 5000 |
7 | 9000 < HDD65°F ≤ 12600 | 5000 < HDD18°C ≤ 7000 |
8 | 12600 < HDD65°F | 7000 < HDD18°C |
TABLE N1101.12.3(1) [R303.1.3(1)]
DEFAULT GLAZED FENESTRATION U-FACTOR
FRAME TYPE | SINGLE PANE | DOUBLE PANE | SKYLIGHT | |
Single | Double | |||
Metal | 1.20 | 0.80 | 2.00 | 1.30 |
Metal with Thermal Break | 1.10 | 0.65 | 1.90 | 1.10 |
Nonmetal or Metal Clad | 0.95 | 0.55 | 1.75 | 1.05 |
Glazed Block | 0.60 |
TABLE N1101.12.3(2) [R303.1.3(2)]
DEFAULT DOOR U-FACTORS
DOOR TYPE | U-FACTOR |
Uninsulated Metal | 1.20 |
Insulated Metal | 0.60 |
Wood | 0.50 |
Insulated, nonmetal edge, max 45% glazing, any glazing double pane | 0.35 |
TABLE N1101.12.3(3) [R303.1.3(3)]
DEFAULT GLAZED FENESTRATION SHGC AND VT
SINGLE GLAZED | DOUBLE GLAZED | GLAZED BLOCK | |||
Clear | Tinted | Clear | Tinted | ||
SHGC | 0.8 | 0.7 | 0.7 | 0.6 | 0.6 |
VT | 0.6 | 0.3 | 0.6 | 0.3 | 0.6 |
TABLE N1102.1.1 (R402.1.1)
INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa
CLIMATE ZONE | FENESTRATION U-FACTORb | SKYLIGHTb U-FACTOR | GLAZED FENESTRATION SHGCb, e | CEILING R-VALUE | WOOD FRAME WALL R-VALUE | MASS WALL R-VALUEi | FLOOR R-VALUE | BASEMENTc WALL R-VALUE | SLABd R-VALUE & DEPTH | CRAWL SPACEc WALL R-VALUE |
1 | NR | 0.75 | 0.25 | 30 | 13 | 3/4 | 13 | 0 | 0 | 0 |
2 | 0.40 | 0.65 | 0.25 | 38 | 13 | 4/6 | 13 | 0 | 0 | 0 |
3 | 0.35 | 0.55 | 0.25 | 38 | 20 or 13 + 5h | 8/13 | 19 | 5/13f | 0 | 5/13 |
4 except Marine | 0.35 | 0.55 | 0.40 | 49 | 20 or 13 + 5h | 8/13 | 19 | 10 /13 | 10, 2 ft | 10/13 |
5 and Marine 4 | 0.32 | 0.55 | NR | 49 | 20 or 13 + 5h | 13/17 | 30g | 15/19 | 10, 2 ft | 15/19 |
6 | 0.32 | 0.55 | NR | 49 | 20 + 5 or 13 + 10h | 15/20 | 30g | 15/19 | 10, 4 ft | 15/19 |
7 and 8 | 0.32 | 0.55 | NR | 49 | 20 + 5 or 13 + 10h | 19/21 | 38g | 15/19 | 10, 4 ft | 15/19 |
TABLE N1102.1.3 (R402.1.3)
EQUIVALENT U-FACTORSa
CLIMATE ZONE | FENESTRATION U-FACTOR | SKYLIGHT U-FACTOR | CEILING U-FACTOR | FRAME WALL U-FACTOR | MASS WALL U-FACTORb | FLOOR U-FACTOR | BASEMENT WALL U-FACTOR | CRAWL SPACE WALL U-FACTOR |
1 | 0.50 | 0.75 | 0.035 | 0.082 | 0.197 | 0.064 | 0.360 | 0.477 |
2 | 0.40 | 0.65 | 0.030 | 0.082 | 0.165 | 0.064 | 0.360 | 0.477 |
3 | 0.35 | 0.55 | 0.030 | 0.057 | 0.098 | 0.047 | 0.091c | 0.136 |
4 except Marine | 0.35 | 0.55 | 0.026 | 0.057 | 0.098 | 0.047 | 0.059 | 0.065 |
5 and Marine 4 | 0.32 | 0.55 | 0.026 | 0.057 | 0.082 | 0.033 | 0.050 | 0.055 |
6 | 0.32 | 0.55 | 0.026 | 0.048 | 0.060 | 0.033 | 0.050 | 0.055 |
7 and 8 | 0.32 | 0.55 | 0.026 | 0.048 | 0.057 | 0.028 | 0.050 | 0.055 |
TABLE N1102.2.6 (R402.2.6)
STEEL-FRAME CEILING, WALL AND FLOOR INSULATION
(R-VALUE)
WOOD FRAME R-VALUE REQUIREMENT | COLD-FORMED STEEL EQUIVALENT R-VALUEa |
Steel Truss Ceilingsb | |
R-30 | R-38 or R-30 + 3 or R-26 + 5 |
R-38 | R-49 or R-38 + 3 |
R-49 | R-38 + 5 |
Steel Joist Ceilingsb | |
R-30 | R-38 in 2 × 4 or 2 × 6 or 2 × 8 R-49 in any framing |
R-38 | R-49 in 2 × 4 or 2 × 6 or 2 × 8 or 2 × 10 |
Steel-Framed Wall, 16″ o.c. | |
R-13 | R-13 + 4.2 or R-19 + 2.1 or R-21 + 2.8 or R-0 + 9.3 or R-15 + 3.8 or R-21 + 3.1 |
R-13 + 3 | R-0 + 11.2 or R-13 + 6.1 or R-15 + 5.7 or R-19 + 5.0 or R-21 + 4.7 |
R-20 | R-0 + 14.0 or R-13 + 8.9 or R-15 + 8.5 or R-19 + 7.8 or R-19 + 6.2 or R-21 + 7.5 |
R-20 + 5 | R-13 + 12.7 or R-15 + 12.3 or R-19 + 11.6 or R-21 + 11.3 or R-25 + 10.9 |
R-21 | R-0 + 14.6 or R-13 + 9.5 or R-15 + 9.1 or R-19 + 8.4 or R-21 + 8.1 or R-25 + 7.7 |
Steel-Framed Wall, 24″ o.c. | |
R-13 | R-0 + 9.3 or R-13 + 3.0 or R-15 + 2.4 |
R-13 + 3 | R-0 + 11.2 or R-13 + 4.9 or R-15 + 4.3 or R-19 + 3.5 or R-21 + 3.1 |
R-20 | R-0 + 14.0 or R-13 + 7.7 or R-15 + 7.1 or R-19 + 6.3 or R-21 + 5.9 |
R-20 + 5 | R-13 + 11.5 or R-15 + 10.9 or R-19 + 10.1 or R-21 + 9.7 or R-25 + 9.1 |
R-21 | R-0 + 14.6 or R-13 + 8.3 or R-15 + 7.7 or R-19 + 6.9 or R-21 + 6.5 or R-25 + 5.9 |
Steel Joist Floor | |
R-13 | R-19 in 2 × 6, or R-19 + 6 in 2 × 8 or 2 × 10 |
R-19 | R-19 + 6 in 2 × 6, or R-19 + 12 in 2 × 8 or 2 × 10 |
Exception: For sunrooms with thermal isolation, and enclosing conditioned spaces, the following exceptions to the insulation requirements of this code shall apply:
Exception: For sunrooms with thermal isolation and enclosing conditioned spaces, in Zones 4 through 8, the following exceptions to the fenestration requirements of this code shall apply:
TABLE N1102.4.1.1 (R402.4.1.1)
AIR BARRIER AND INSULATION INSTALLATION
COMPONENT | CRITERIAa |
Air barrier and thermal barrier | A continuous air barrier shall be installed in the building envelope. Exterior thermal envelope contains a continuous air barrier. Breaks or joints in the air barrier shall be sealed. Air-permeable insulation shall not be used as a sealing material. |
Ceiling/attic | The air barrier in any dropped ceiling/soffit shall be aligned with the insulation and any gaps in the air barrier sealed. Access openings, drop down stair or knee wall doors to unconditioned attic spaces shall be sealed. |
Walls | Corners and headers shall be insulated and the junction of the foundation and sill plate shall be sealed. The junction of the top plate and top of exterior walls shall be sealed. Exterior thermal envelope insulation for framed walls shall be installed in substantial contact and continuous alignment with the air barrier. Knee walls shall be sealed. |
Windows, skylights and doors | The space between window/door jambs and framing and skylights and framing shall be sealed. |
Rim joists | Rim joists shall be insulated and include the air barrier. |
Floors (including above-garage and cantilevered floors) | Insulation shall be installed to maintain permanent contact with underside of subfloor decking. The air barrier shall be installed at any exposed edge of insulation. |
Crawl space walls | Where provided in lieu of floor insulation, insulation shall be permanently attached to the crawlspace walls. Exposed earth in unvented crawl spaces shall be covered with a Class I vapor retarder with overlapping joints taped. |
Shafts, penetrations | Duct shafts, utility penetrations, and flue shafts opening to exterior or unconditioned space shall be sealed. |
Narrow cavities | Batts in narrow cavities shall be cut to fit, or narrow cavities shall be filled by insulation that on installation readily conforms to the available cavity space. |
Garage separation | Air sealing shall be provided between the garage and conditioned spaces. |
Recessed lighting | Recessed light fixtures installed in the building thermal envelope shall be air tight, IC rated, and sealed to the drywall. |
Plumbing and wiring | Batt insulation shall be cut neatly to fit around wiring and plumbing in exterior walls, or insulation that on installation readily conforms to available space shall extend behind piping and wiring. |
Shower/tub on exterior wall | Exterior walls adjacent to showers and tubs shall be insulated and the air barrier installed separating them from the showers and tubs. |
Electrical/phone box on exterior walls | The air barrier shall be installed behind electrical or communication boxes or air-sealed boxes shall be installed. |
HVAC register boots | HVAC register boots that penetrate building thermal envelope shall be sealed to the subfloor or drywall. |
Fireplace | An air barrier shall be installed on fireplace walls. Fireplaces shall have gasketed doors. |
During testing:
Exception: Site-built windows, skylights and doors.
Exception: Ducts or portions thereof located completely inside the building thermal envelope.
Exceptions:
Exception: The total leakage test is not required for ducts and air handlers located entirely within the building thermal envelope.
TABLE N1103.4.2 (R403.4.2)
MAXIMUM RUN LENGTH (feet)a
Nominal pipe diameter of largest diameter pipe in the run (inch) | 3/8 | 1/2 | 3/4 | > 3/4 |
Maximum run length | 30 | 20 | 10 | 5 |
Exception: Where whole-house mechanical ventilation fans are integral to tested and listed HVAC equipment, they shall be powered by an electronically commutated motor.
TABLE N1103.5.1 (R403.5.1)
MECHANICAL VENTILATION SYSTEM FAN EFFICACY
FAN LOCATION | AIR FLOW RATE MINIMUM (CFM) | MINIMUM EFFICACYa (CFM/WATT) | AIR FLOW RATE MAXIMUM (CFM) |
Range hoods | Any | 2.8 cfm/watt | Any |
In-line fan | Any | 2.8 cfm/watt | Any |
Bathroom, utility room | 10 | 1.4 cfm/watt | < 90 |
Bathroom, utility room | 90 | 2.8 cfm/watt | Any |
For SI: 1 cubic foot per minute = 28.3 L/min. |
a. When tested in accordance with HVI Standard 916 |
Exceptions:
Exception: Pools deriving over 70 percent of the energy for heating from site-recovered energy, such as a heat pump or solar energy source computed over an operating season.
Exception: Multiple orientations. When an otherwise identical building model is offered in multiple orientations, compliance for any orientation shall be permitted by documenting that the building meets the performance requirements in each of the four cardinal (north, east, south and west) orientations.
TABLE N1105.5.2(1) [R405.5.2(1)]
SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
BUILDING COMPONENT | STANDARD REFERENCE DESIGN | PROPOSED DESIGN |
Above-grade walls | Type: mass wall if proposed wall is mass; otherwise wood frame. Gross area: same as proposed U-factor: from Table N1102.1.3 Solar absorptance = 0.75 Remittance = 0.90 | As proposed As proposed As proposed As proposed As proposed |
Basement and crawl space walls | Type: same as proposed Gross area: same as proposed U-factor: from Table N1102.1.3, with insulation layer on interior side of walls. | As proposed As proposed As proposed |
Above-grade floors | Type: wood frame Gross area: same as proposed U-factor: from Table N1102.1.3 | As proposed As proposed As proposed |
Ceilings | Type: wood frame Gross area: same as proposed U-factor: from Table N1102.1.3 | As proposed As proposed As proposed |
Roofs | Type: composition shingle on wood sheathing Gross area: same as proposed Solar absorptance = 0.75 Emittance = 0.90 | As proposed As proposed As proposed As proposed |
Attics | Type: vented with aperture = 1 ft2 per 300 ft2 ceiling area | As proposed |
Foundations | Type: same as proposed foundation wall area above and below grade and soil characteristics: same as proposed. | As proposed As proposed |
Doors | Area: 40 ft2 Orientation: North U-factor: same as fenestration from Table N1102.1.3. | As proposed As proposed As proposed |
Glazinga | Total areab = (a) The proposed glazing area; where proposed glazing area is less than 15% of the conditioned floor area. (b) 15% of the conditioned floor area; where the proposed glazing area is 15% or more of the conditioned floor area. | As proposed |
Orientation: equally distributed to four cardinal compass orientations (N, E, S & W). | As proposed | |
U-factor: from Table N1102.1.3 | As proposed | |
SHGC: From Table N1102.1.1 except that for climates with no requirement (NR) SHGC = 0.40 shall be used. Interior shade fraction: 0.92-(0.21 × SHGC for the standard reference design) External shading: none | As proposed 0.92-(0.21 × SHGC as proposed) As proposed | |
Skylights | None | As proposed |
Thermally isolated sunrooms | None | As proposed |
(continued)
TABLE N1105.5.2(1) [R405.5.2(1)]—continued
SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
BUILDING COMPONENT | STANDARD REFERENCE DESIGN | PROPOSED DESIGN |
Air exchange rate | Air leakage rate of 5 air changes per hour in Zones 1 and 2, and 3 air changes per hour in Zones 3 through 8 at a pressure of 0.2 inches w.g (50 Pa). The mechanical ventilation rate shall be in addition to the air leakage rate and the same as in the proposed design, but no greater than 0.01 × CFA + 7.5 × (Nbr + 1) where: CFA = conditioned floor area Nbr = number of bedrooms Energy recovery shall not be assumed for mechanical ventilation. | For residences that are not tested, the same air leakage rate as the standard reference design. For tested residences, the measured air exchange ratec. The mechanical ventilation rated shall be in addition to the air leakage rate and shall be as proposed. |
Mechanical ventilation | None, except where mechanical ventilation is specified by the proposed design, in which case: Annual vent fan energy use: kWh/yr = 0.03942 × CFA + 29.565 × (Nbr+ 1) where: CFA = conditioned floor area Nbr= number of bedrooms | As proposed |
Internal gains | IGain = 17,900 + 23.8 × CFA + 4104 × Nbr(Btu/day per dwelling unit) | Same as standard reference design. |
Internal mass | An internal mass for furniture and contents of 8 pounds per square foot of floor area. | Same as standard reference design, plus any additional mass specifically designed as a thermal storage elemente but not integral to the building envelope or structure. |
Structural mass | For masonry floor slabs, 80% of floor area covered by R-2 carpet and pad, and 20% of floor directly exposed to room air. For masonry basement walls, as proposed, but with insulation required by Table N1102.1.3 (R402.1.3) located on the interior side of the walls. For other walls, for ceilings, floors, and interior walls, wood frame construction. | As proposed As proposed As proposed |
Heating systems f, g | As proposed for other than electric heating without a heat pump. Where the proposed design utilizes electric heating without a heat pump the standard reference design shall be an air source heat pump meeting the requirements of Section C403 of the International Energy Conservation Code—Commercial Provisions. Capacity: sized in accordance with Section N1103.6 | As proposed |
Cooling systemsf, h | As proposed Capacity: sized in accordance with Section N1103.6. | As proposed |
Service water Heatingf, g, h, i | As proposed Use: same as proposed design | As proposed gal/day = 30 + (10 × Nbr) |
Thermal distribution systems | None | Thermal distribution system efficiency shall be as tested or as specified in Table N1105.5.2(2) if not tested. Duct insulation shall be as proposed. |
Thermostat | Type: Manual, cooling temperature setpoint = 75°F; Heating temperature setpoint = 72°F | Same as standard reference |
TABLE N1105.5.2(2) [R405.5.2(2)]
DEFAULT DISTRIBUTION SYSTEM EFFICIENCIES FOR PROPOSED DESIGNSa
DISTRIBUTION SYSTEM CONFIGURATION AND CONDITION | FORCED AIR SYSTEMS | HYDRONIC SYSTEMSb |
Distribution system components located in unconditioned space | — | 0.95 |
Untested distribution systems entirely located in conditioned spacec | 0.88 | 1 |
“Ductless“ systemsd | 1 | — |