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INSTALLATION
EXHAUST
BOILER
Fig. 27
All Combustion Air from Adjacent Indoor Spaces through
Indoor Combustion Air Openings
EXHAUST
BOILER
Fig. 28
All Combustion Air from Outdoors through Ventilated Attic
EXHAUST
BOILER
Fig. 29
All Combustion Air From Outdoors - Inlet Air From Ventilated
Crawl Space and Outlet Air to Ventilated Attic
EXHAUST
BOILER
AIR DUCT
AIR DUCT
Fig. 30
All Combustion Air from Outdoors through Horizontal Ducts
VENTING CONFIGURATIONS: The following gures show the acceptable piping installation for venting and combustion air.
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