INSTALLATION : EXHAUST FLUE INSTALLATION
MAXIMUM FLUE LENGTH (HORIZONTAL RUN AND VERTICAL HEIGHT)
Horizontal Units with an External Tee: The maximum combined horizontal length and vertical height of the flue is 28 feet. The maximum allowable flue height is 24 feet, and the maximum allowable horizontal length is 8 feet. The vertical height is measured from the tee connection to termination of the stack. Only two sections of flue are allowed in the horizontal run, so that there is only one seam between the unit connection and the external tee. If the horizontal run is longer than 4 feet, then the flue must be supported inside of the building near the seam. See the illustrations and table below:
Horizontal Run Length (feet)
Max. Allowable Height (feet)
4
24
5
23
6
22
7
21
8 (Max)
20
STRICTLY FOLLOW THE FLUE MANUFACTURER’S INSTALLATION INSTRUCTIONS WHEN INSTALLING FLUE THROUGH THE BUILDING STRUCTURE.
Internal Vertical Units: The maximum allowable flue height is 24 ft. The height is measured from the flue collar connection to the termination of the stack. Refer to next page for a diagram.
GARN WHS 1000 and WHS 2000 Manual © HY-C Company LLC - September 2024
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