// CODE SNIPPET

N1102.1.4 (R402.1.4) U-factor Alternative

Residential Code 2018 of Kansas > 11 [RE] Energy Efficiency > N1102 (R402) Building Thermal Envelope > N1102.1 (R402.1) General (Prescriptive) > N1102.1.4 (R402.1.4) U-factor Alternative

JUMP TO FULL CODE CHAPTER

An assembly with a U-factor equal to or less than that specified in Table N1102.1.4 shall be permitted as an alternative to the R-value in Table N1102.1.2.

TABLE N1102.1.4 (R402.1.4)

EQUIVALENT U-FACTORS^a

CLIMATE ZONE	FENESTRATION U-FACTOR	SKYLIGHT U-FACTOR	CEILING U-FACTOR	FRAME WALL U-FACTOR	MASS WALL U-FACTOR^b	FLOOR U-FACTOR	BASEMENT WALL U-FACTOR	CRAWL SPACE WALL U-FACTOR
1	0.50	0.75	0.035	0.084	0.197	0.064	0.360	0.477
2	0.40	0.65	0.030	0.084	0.165	0.064	0.360	0.477
3	0.32	0.55	0.030	0.060	0.098	0.047	0.091^c	0.136
4 except Marine	0.32	0.55	0.026	0.060	0.098	0.047	0.059	0.065
5 and Marine 4	0.30	0.55	0.026	0.060	0.082	0.033	0.050	0.055
6	0.30	0.55	0.026	0.045	0.060	0.033	0.050	0.055
7 and 8	0.30	0.55	0.026	0.045	0.057	0.028	0.050	0.055

Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source.
Mass walls shall be in accordance with Section N1102.2.5. Where more than half the insulation is on the interior, the mass wall U-factors shall not exceed 0.17 in Climate Zone 1, 0.14 in Climate Zone 2, 0.12 in Climate Zone 3, 0.087 in Climate Zone 4 except Marine, 0.065 in Climate Zone 5 and Marine 4, and 0.057 in Climate Zones 6 through 8.
In warm-humid locations as defined by Figure N1101.7 and Table N1101.7, the basement wall U-factor shall not exceed 0.360.

Related Code Sections

N1102.1.4 [RE] Energy Efficiency, (R402.1.4) U-factor Alternative

An assembly with a U- factor equal to or less than that specified in Table N1102.1.4 shall be permitted as an alternative to the R -value in Table ...

Residential Code 2018 of Kansas > 11 [RE] Energy Efficiency > N1102 (R402) Building Thermal Envelope > N1102.1 (R402.1) General (Prescriptive) > N1102.1.4 (R402.1.4) U-factor Alternative

R402.1.4 [RE] Residential Energy Efficiency, U-factor Alternative

An assembly with a U -factor equal to or less than that specified in Table R402.1.4 shall be an alternative to the R -value in Table R402.1.2 ...

Energy Conservation Code 2018 of Kansas > 4 [RE] Residential Energy Efficiency > R402 Building Thermal Envelope > R402.1 General (Prescriptive) > R402.1.4 U-factor Alternative

R402.2.1 [RE] Residential Energy Efficiency, Ceilings With Attic Spaces

not apply to the U -factor alternative approach in Section R402.1.4 and the Total UA alternative in Section R402.1.5 ...

Energy Conservation Code 2018 of Kansas > 4 [RE] Residential Energy Efficiency > R402 Building Thermal Envelope > R402.2 Specific Insulation Requirements (Prescriptive) > R402.2.1 Ceilings With Attic Spaces

Section R402 [RE] Residential Energy Efficiency, Building Thermal Envelope

be an alternative to the R -value in Table R402.1.2. TABLE R402.1.4 EQUIVALENT U -FACTORS a CLIMATE ZONE FENESTRATION U -FACTOR SKYLIGHT U ...

Energy Conservation Code 2018 of Kansas > 4 [RE] Residential Energy Efficiency > R402 Building Thermal Envelope

R402.1 [RE] Residential Energy Efficiency, General (Prescriptive)

be an alternative to the R -value in Table R402.1.2. TABLE R402.1.4 EQUIVALENT U -FACTORS a CLIMATE ZONE FENESTRATION U -FACTOR SKYLIGHT U ...

Energy Conservation Code 2018 of Kansas > 4 [RE] Residential Energy Efficiency > R402 Building Thermal Envelope > R402.1 General (Prescriptive)