Isokern VF-36, Installation, Operation, Maintenance And Owner'S Manual, Page: 13 / 16

13
Noncombustible Finished Facing Requirements & Clearance to
Combustibles
Interior Wall Materials:
Wall materials, such as drywall, should be set flush with the
rough front face of the Vent-Free fireplace. This will allow for
placement of required noncombustible surround material in
such a way that the surround material can lay flat against the
finished wall surface and also align with the leading edge of the
fire brick interior of the Vent-Free fireplace.
Trim Facings:
Parts of the combustible mantle assembly located along the
sides of the firebox opening, which project more than one and
one-half inches (1-1/2”) from the face of the fireplace, shall be
kept at least eight inches (8”) from the firebox opening.
Adjoining Room Walls:
Interior wall surfaces of adjoining room walls must be at a
minimum horizontal measure of twenty four inches (24”) away
from the finished opening of the Vent-Free fireplace.
Mantle and Mantle Shelf Clearance:
Vent-Free fireplace are subject to the same building code safety
clearances from the firebox opening as with any fireplace
opening:
Parts of the combustible mantle assembly located
above and projecting more than one and one-half inches
(1-1/2”) inches from the firebox opening shall be kept at least
twelve inches (12”) from the top of the opening.
Mantle shelves with horizontal projection of twelve
inches (12”) from the face of the fireplace must be held to a
minimum vertical distance of twelve inches (12”) from the top
of the finished fireplace opening.
Note:
Mantle height clearances may vary among gas log
appliance manufacturers or with the use of firebox canopies.
Be sure to follow the gas log appliance manufacturer’s
explicit installation instructions for mantle height clearance
requirements.
Adjoining Wall
Safe Zone
8”
24”
24”
12”
12”
Noncombustible
Facing Material
Combustible Mantle Shelf
8”