W415-0865 / 04.07.10
19
Outside air (Recommended)
(Installation showing inlet of out-
side air in ventilated crawl space)
Ceiling Support
Vent must maintain 3”
clearance to combus-
tibles.
Vertical Cap
Roof Flashing
Storm Collar
Floor Protection
3”
2”
5.6.3 VERTICAL TERMINATION
Class A Chimney
Ceiling Support
Outside air
(Recommended)
(Installation show-
ing inlet of outside
air in ventilated
crawl space)
Vent must maintain
3” clearance to
combustibles.
Roof Flashing
Storm Collar
Floor Protection
3”
2”
Vertical Cap
5.6.4 CLASS A CHIMNEY RETROFIT