Venting24
The chimney top must be capped to prevent rain and/or snow from entering the chimney.
Fiberglass insulation |
packed above the |
damper opening and |
sealed plate. (Not a |
Harman product.) |
Fig.51 |
#3 Installing into an existing
chimney (US only)
This method provides excellent venting for nor- mal operation. This method also provides natural draft in the event of a power failure. If the chimney condition is questionable you may want to install a liner as in method #2.
This is the minimum allowed vent pipe using 4" stainless steel flex pipe.
The vent pipe must extend past the damper sealing area by at least 12 inches.
Note: The fiberglass insulation must not be al- lowed to expand to the point that it covers the end of the flex pipe.
The chimney should be capped with any style cap that will not allow rain or snow to enter.
Chimney top
MUST BE SEALED
#4 Preferred method
Fiberglass insulation packed above the damper opening and sealed plate. (Not a Harman product.)
12" minimum |
36" |
18" min. |
Fig.52 |
This method provides excellent venting for nor- mal operation and in a fireplace with inadaquate flue space, or a height of over 30 feet. A 3" or 4" PL vent pipe should be used with an optional swivel flue stub.
NOTE: The flue stub insulation wrap must still be used with this method. See page 13, Fig. 27 &
29.With a 100% outside air kit the outside air can be installed in the same manner as the flue pipe.
Stainless Steel | 3" Flex | |
Outside Air Inlet | ||
pipe | ||
Cover | ||
| ||
part# |
|
CAUTION
KEEP COMBUSTIBLES (SUCH AS GRASS, LEAVES, ETC.) AT LEAST 3 FEET AWAY FROM THE FLUE OUTLET ON THE OUTSIDE OF THE BUILDING.
