3 ft min. from top of uppermost chimney section to air inlet.
Figure 4.2 Outside Air Inlet Locations
Attic insulation shield may be used to keep insulation away from chimney.
Ceiling firestop on floor of attic.
Handle left - open
Handle right - closed
Figure 4.4 Locating the Outside Air Control
NO | NO |
|
Garage or | NO | |
Outlet blocked by | combustible | |
snow, leaves, etc. | liquids storage | Attic space |
NO
Outlet placed
higher than 3 ft
below the
termination cap
YES | ||
Clear area | ||
fireplace | ||
outside | ||
| ||
house or in |
| |
ventilated |
| |
crawl space | Use only duct materials specified | |
| by manufacturer (preferably with | |
| short run or mainly straight duct, | |
| except small dip for cold air trap | |
| which will help prevent flow of cold air). |
Figure 4.3 Outside Combustion Air Placement
14 | Heat & Glo • |
