// CODE SNIPPET
R1006.2 Exterior Air Intake
JUMP TO FULL CODE CHAPTER
This section has been amended at the state or city level.
The exterior air intake shall be capable of supplying all combustion air from the exterior of the dwelling or from spaces within the dwelling ventilated with outdoor air such as nonmechanically ventilated crawl or attic spaces. The exterior air intake shall not be located within the garage or basement of the dwelling. The exterior air intake, for other than listed factory-built fireplaces, shall not be located at an elevation higher than the firebox. The exterior air intake shall be covered with a corrosion-resistant screen of 1/4-inch (6.4 mm) mesh.
Solid fuel burning appliances and fireplaces shall be provided with tight fitting metal or ceramic glass doors, and:
- A source from outside the structure of primary combustion air, connected to the appliance as per manufacturer's specification. The air inlet shall originate at a point below the fire box. The duct shall be 4 inches or greater in diameter, not exceed 20 feet in length, and be installed as per manufacturer's instructions; or
- The appliance and manufacturer's recommended
combustion air supply, as an installed unit, shall be
certified by an independent testing laboratory to have
passed Test No. 11-Negative Pressure Test, Section
12.3, of ULC S627-M1984 "Space Heaters for Use
with Solid Fuels," modified as follows:
Negative pressure of 8 Pascal shall be initially established with the chamber sealed and the air supply, if not directly connected to the appliance, closed off.
The air supply if not directly connected to the appliance, shall then be opened.
The maximum allowable air exchange rate from chamber leakage and intentional air supply for the unit (appliance with combustion air supply) in the test chamber is 3.5 air changes per hour, or 28 cfm (cubic feet of air per minute), whichever is less.
Exception: Combustion air may be supplied to the room in which the solid fuel burning appliance is located in lieu of direct ducting, provided that one of the following conditions is met:
- The solid fuel burning appliance is part of a central heating plant and installed in an unconditioned space in conformance with the International Mechanical Code; or
- The solid fuel burning appliance is installed in existing construction directly on a concrete floor or surrounded by masonry materials as in a fireplace. The combustion air terminus shall be located as close to the solid fuel burning appliance as possible and shall be provided with a barometric damper or equivalent. The combustion air source shall be specified by the manufacturer or no less than 4 inches in diameter or the equivalent in area or as approved.
Related Code Sections
2111.14.3 Masonry, Exterior Air Intake
The exterior air intake shall be capable of providing all combustion air from the exterior of the dwelling . The exterior air intake shall ...
2015 Washington State Building Code > 21 Masonry > 2111 Masonry Fireplaces > 2111.14 Exterior Air > 2111.14.3 Exterior Air Intake
Section R1006 Chimneys and Fireplaces, Exterior Air Supply
The exterior air intake shall be capable of supplying all combustion air from the exterior of the dwelling or from spaces within the dwelling ...
401.5 Ventilation, Intake Opening Protection
Air intake openings that terminate outdoors shall be protected with corrosion-resistant screens, louvers or grilles. Openings in louvers, grilles ...
2015 Washington State Mechanical Code > 4 Ventilation > 401 General > 401.5 Intake Opening Protection
1206.3.2 Interior Environment, Air Intake
Courts more than two stories in height shall be provided with a horizontal air intake at the bottom not less than 10 square feet (0.93 m 2 ...
2015 Washington State Building Code > 12 Interior Environment > 1206 Yards or Courts > 1206.3 Courts > 1206.3.2 Air Intake
R303.6 Building Planning, Outside Opening Protection
weather conditions. Outdoor air exhaust and intake openings shall meet the provisions for exterior wall opening protectives in accordance ...
2015 Washington State Residential Code > 3 Building Planning > R303 Light, Ventilation and Heating > R303.6 Outside Opening Protection