A–5 SWS Maximum CAZ Depressurization
|
Appliance Type |
Max. Depress. |
|---|---|
|
Atmospheric water heater only (Category I, natural draft), open-combustion appliances, and orphaned water heaters |
–2 pa |
|
Atmospheric water heater (Category I, natural draft) and atmospheric furnace (Category I, natural draft), common-vented, open-combustion appliances |
–3 pa |
|
Gas furnace or boiler, Category I or Category I fan-assisted, open-combustion appliances, and stand-alone gas water heaters |
–5 pa |
|
Oil or gas unit with power burner, low- or high-static pressure burner, open combustion appliances |
–5 pa |
|
Wood-burning appliances |
–7 pa |
|
Open-combustion furnaces or boilers with fan-powered horizontal venting |
–15 pa |
|
Pellet stove with draft fan and sealed vent |
–15 pa |
|
Direct-vent, sealed combustion appliances with forced draft |
–25 pa |
|
SWS Detail: 2.0299.1 Combustion Appliance Depressurization Limits Table |