P
AGE
12
I
NSTALLATION
(C
ONT
.)
Vent Requirements
!
Always maintain the required 1" clearance (air space) to combustible materials to prevent a fire
hazard. Do not fill air spaces with insulation.
!
The gas appliance and vent system must be vented directly to the outside of the building, and never
be attached to a chimney serving a separate solid fuel or gas-burning appliance. Each direct vent gas
appliance must use it's own separate vent system.
!
If the fireplace is installed at an altitude over 3,000 feet the flame quality will need to be carefully
evaluated. See Addendum #1, "Altitude Considerations", on page 39.
•
When the vent passes through a wall, a wall thimble is required. When the vent passes through a
ceiling, a support box or firestop is required. When the vent passes through the roof, a roof flashing
and storm collar are required. Follow the instructions provided with the vent (from Duravent®) for
installing these items.
