PVVK-CFA FLEX VENT KIT
Available from Empire Comfort Systems, Inc.
The flex vent kit is a flexible vent hose that is 42” in length. The flex vent kit will be used when installing a Mantis into an existing fireplace. The flex vent kit can be cut down, but can only be cut from one end.
Cement PVC Joints
Cut End
Cement PVC Joints 
Once length is determined, install two (2) 10 x 1/2” screws into the adaptor assembly to secure the adaptor assembly to the flex hose. Using PVC cement, cement all PVC joints of the flex vent kit to the remaining PVC vent run.
Determining Minimum Vent Height Above the Roof
WARNING: Major U.S. building codes specify minimum chimney and/or vent height above the rooftop. These minimum heights are necessary in the interest of safety.
VENT CAP (SUPPLIED
WITH VENT KIT)
GALV. SHEET FLASHING TO SEAL CHIMNEY (SUPPLIED BY INSTALLER)
PVC PIPE SWV (SUPPLIED BY INSTALLER)
(2)- 45 DEG. PVC BENDS (SUPPLIED BY INSTALLER
IF NECCESSARY)
| ROOF PITCH | H (Min.) |
| Flat to 6/12 | 12” (305 mm) |
| 6/12 to 7/12 | 15” (381 mm) |
| Over 7/12 to 8/12 | 18” (457 mm) |
CUT END | Over 8/12 to 16/12 | 24” (610 mm) |
| Over 16/12 to 21/12 | 36” (914 mm) |
FLEXIBLE
FLUE KIT
FLEXIBLE GAS
LINE
Venting for Existing Fireplace Installation
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