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Framing
Figure 2. Framing dimensions.
When installing a shelf over the top of the fireplace, the following
guidelines must be adhered to: The minimum clearance from the top
of the fireplace to a shelf is 8 cm.
Figure 3. Framing for shelves over the fireplace.
WARNING:
When this appliance is installed directly on carpeting, tile or
any combustible material other than wood flooring, it must
be installed on a metal or wood panel extending the full
width and depth of the appliance.
Part No. XG0138
Installation
Clearances
These clearances apply to all dimensions except the framed opening,
where the clearance to combustibles is 0 cm. The 24VF clearances to
combustible materials are:
* When sheetrock is
not used behind the
fireplace, framing
depth may be reduced
to 18 cm
Unprotected combustible walls which are perpendicular to the fire-
place opening, must fall within the limits outlined in Figure 7.
For protection against freezing temperatures, it is recommended that
outer walls of the chase be insulated with a vapour barrier. This will
reduce the possibility of a cold-air convection current on the fireplace.
Space Requirements
This heater must not be installed in a confined space or unusually
tight construction unless provisions are made for adequate combus-
tion and ventilation air.
The National Fuel Gas Code, ANSI Z223.1, defines a confined space
as a space whose volume is less than 50 cubic feet per 1,000 BTU
per hour (4.8 m
installed in that space and an unconfined space as a space whose
volume is not less than 50 cubic feet per 1,000 BTU per hour (4.8 m
per kw) of the aggregate input rating of all appliances installed in that
space. Rooms communicating directly with the space in which all the
appliances are installed, through openings not furnished with doors,
are considered a part of the unconfined space.
Example:
If you are installing this fireplace in a rectangular room which meas-
ures 12' × 15' × 8' in height, that room will have a volume of 1440 cu.
ft. (ft
). If there is no other appliances in the room which consume
3
oxygen, then the maximum BTU fireplace which can be installed in
such a room is 28,800 BTU (1440 ft
volume of space in which this fireplace can be installed is equal
to:
Figure 4. Dimensions of the room example.
Top
Back
Sides
Floor
Mantle**
* Clearance from the top of the fireplace to a combusti-
ble ceiling within the fireplace enclosure.
** Refer to page 5.
per kw) of the aggregate input rating of all appliances
3
÷ 50 × 1000) The minimum
3
18,000 BTU's / hour ÷ 1000 = 18 kBTU/h
18 kBTU/h × 50 ft
/ kBTU/h = 900 ft
3
Therefore this heater may be installed in the space
24VF Gas Fireplace
8 cm
0 cm
0 cm
0 cm
31 cm
3
3
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