OLD SALEM GAS COAL VENT FREE FIREPLACE
Page 7 of 16
WARNING
: Some state or local codes
may
not allow operation of unvcnted appliances. Check
your state or local codes.
2) COMBUSTION AIR
(a)
WARNING:
If the area in which the appliance is to be operated is smaller than 750 cubic
feet, or it the building is of an unusually tight construction, adequate combustion and ventilation
air must bc provided by one of the methods described in the
National Fuel
Gas
Code
ANSI
Z223.1/NFPA
54,
Air for Combustion and Ventilation, or applicable local codes.
Unusually tight construction is defined as construction where:
(1)
Walls and ceilings exposed to the outside atmosphere have a continuous water
vapor retarder with a rating of 1 perm (6 x 10 “ kg per pa-sec-m2) or less with
openings gasketed or sealed;
(2)
Weather stripping has been added on openable windows and doors; and
(3)
Caulking or sealants are applied to areas such as joints around window and door
frames, between sole plates and floors, between wall-ceiling joints, between wall
panels, at penetrations for plumbing, electrical, gas lines, and at other openings.
(b) The Old Salem coal set has been equipped with an oxygen depletion system to prevent
reduction of the oxygen level in the installation room from reaching a level below 18 percent.
The above requirements are provided to prevent the unlikely occurrence of this level.
3) MINIMUM CLEARANCE TO COMBUSTIBLES;
When the Old Salem vent free coal burner is installed in the firebox, the mantel, if used, may
extend up to 12 inches maximum from the wall and must be located a minimum of 18 inches
above the top of the exhaust grill. Since the combustion gasses will exit the top of the grill the
underside of the mantel should be protected by a high temperature paint or application of a non
combustible lamination.
When installed in a corner location, there must be a minimum clearance of 10 inches from the
outer edge of the firebox opening and the corner wall with the intervening space made of non
combustible materials, cast iron surround, masonry, tile etc. there must be a non combustible
hearth extending a minimum of 14 inches in front of the firebox.
Overall minimum clearances to combustibles on the outside of firebox are:
Sides: 6”
Top:
18”
Hearth: 14”
