-7-
Step 5: Compare the numbers: 84 (Step 4) is larger than 52 (Step 2), so the space is unconned.
You may install the appliance in the room.
If your space is conned, additional ventilation air must be provided, either from within the building
or from outside.
Within the building, you could ventilate to an adjoining space. To do this, you have two options:
either remove the door to the adjoining room, or provide two permanent vented openings (one
opening must be within 12” of the ceiling and the other within 12” of the oor; both openings must
be on the wall separating the two spaces). Follow the National Fuel Gas Code, NFPA 54/ANS
Z223.1, Section 5.3, Air for Combustion and Ventilation for the required size of ventilation grills.
WARNING: After you make ventilation adjustments, redo the worksheet calculations above,
adding the space of the adjoining room. The combined spaces must have enough fresh air to
supply all appliances in both spaces.
To provide extra fresh air from outside, supplemental ventilation grills or ducts may be used. Two
permanent openings, one within 12” of the ceiling and the other within 12” of the oor should
be installed. Connect the openings directly to the outdoors or spaces open to the outdoors
(such as attics and crawl spaces). If supplemental ventilation is required, a qualied Contractor
should be used to install ventilation ducts. Follow the National Fuel Gas Code, NFPA 54/
ANS Z223.1, Section 5.3, Air for Combustion and Ventilation for the required size of ventilation
grills. IMPORTANT: Do not provide openings for inlet or outlet air into an attic if the attic has a
thermostat-controlled power vent. Heated air entering the attic will activate the powervent.
III. SETUP
WARNING: This appliance is for use only in a solid-fuel-burning masonry fireplace, a UL127
factory-built fireplace, or in an approved ventless firebox (ANSI Z21.91).
CAUTION: Do not remove the metal data plate (rating plate) that is attached to the base of the
appliance. It contains important product information.
WARNING: Before installing this appliance in a solid-fuel-burning fireplace, the chimney flue
and firebox must be cleaned of soot, creosote, ashes, and loose paint by a qualified chimney
cleaner. Creosote will ignite if highly heated. Inspect the chimney flue for damage. If
damaged, operate the appliance with the flue damper closed.
WARNING: Seal any fresh air vent or ash clean-out doors located on the floor or walls of the
fireplace. Failure to do so may result in drafts that could cause sooting. Use a heat-resistant
sealant. Do not seal the chimney flue damper.
WARNING: Never install this appliance in a bedroom or bathroom unless installed as a vented
appliance in a recreational vehicle where curtains, furniture, clothing, or other flammable
objects are less than 42 inches from the front, top, or sides of the appliance in high traffic areas
in windy or drafty areas
CAUTION: This appliance creates warm air currents that heat the wall surfaces next to
the appliance. Installing the appliance next to vinyl or cloth wall coverings or furniture, or
operating the appliance where impurities in the air (such as tobacco smoke, aromatic candles,
cleaning fluids, oil or kerosene lamps, etc.) exist, may discolor the walls and furniture.
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