| 2.0203.1a
Required combustion air | The required volume of indoor air will be determined in accordance with 2012
IRC
IRC
International Residential Code
Section G2407.5.1 or G2407.5.2 and authority having jurisdiction, except that where the air
infiltration
Infiltration
The uncontrolled passage of outside air into a building through unintended leaks in the building envelope
rate is known to be less than 0.40 air changes per hour (ACH), 2012
IRC
IRC
International Residential Code
Section G2407.5.2 will be used | Determine if existing conditions meet the combustion air calculation |
| 2.0203.1b
Additional combustion air (if action is required) | Additional combustion air will be provided in accordance with 2012
IRC
IRC
International Residential Code
G2407 and authority having jurisdiction | Ensure adequate combustion air for operation of the appliance |
