The space in the previous example is a confined space because the actual
BTU/Hr used is more than the maximum BTU/Hr the space can support.
You must provide additional fresh air.
Your options are:
a.
Rework equations adding the space of adjoining room(s). If the extra
volume provides an unconfined space, then remove door or add ventilation
grills between rooms. Refer to National Fuel Gas Code, ANSI Z223.1,
Section 5.3.
b.
Vent room directly to the outdoors. Refer to National Fuel Gas Code,
ANSI Z223.1, Section 5.3.
c.
Install a lower BTU/Hr heater, to make the area an unconfined space.
If the actual BTU/Hr used is less than the maximum BTU/Hr the space can
support, then the space is an unconfined space. You will need no additional
fresh air ventilation for an unconfined space.
This appliance is designed to be wall-hung. Do not recess any part
of the appliance into the wall.
This Appliance may be installed in any room in a home except Bathrooms
- or areas where large amounts of steam are likely to be generated.
Installation in living rooms is common, however other rooms such as
kitchens, dining rooms and hallways are permitted, providing a suitable
natural gas supply is available, and rooms sizing and ventilation
requirements are strictly adhered to (see section 4).
The appliance is designed to be versatile, and as such will operate correctly
when exposed to normal gentle draughts experienced within the home. It is
not recommended, however that the appliance be installed in areas where
it is likely to be exposed to persistent strong draughts, that may be
generated by outside doors or windows, air vents etc. It is recommended
that the appliance should not be installed within 20” of any air vent.
Clearances to non-combustibles
Non-combustible surfaces are defined as brick, metal, marble, concrete
etc. and also a number of man-made materials impervious to flame. If in
doubt refer to the material manufacturer for further information before
proceeding with installation.
Clearances to the sides of the appliance are 4”. Clearance to the front of the
appliance is 20”.
The back of the appliance may be installed directly onto a non-combustible
wall, providing the area behind the appliance is flat and does not interfere
with the various vent holes in the back panel of the appliance.
The appliance may be installed with or without a non-combustible hearth. If a
hearth is fitted, the size and design may be as desired.
A non-combustible shelf of any depth may be positioned above the appliance
provided it is no closer than 16” from the top of the appliance glass panel and
the wall above the appliance is non combustible.
Clearances to combustible materials
Combustible materials are defined as wood, fabrics, or other materials likely
to combust if exposed to flame. Generally, any material, which is likely to
discolour, melt or misshape when exposed to moderate heat, should be
considered as a combustible material or surface.
Clearance to the sides of the appliance are 4” but curtains, drapes and other
fabrics are not permitted within a distance of 20” of the appliance sides. No
such materials are permitted directly above the appliance regardless of
distance.
The minimum clearance to the ceiling above the appliance is 32” measured
from the top of the appliance glass panel.
Combustible materials should not be positioned directly in front of the
appliance within a distance of 40”.
Under no circumstances should any electrical equipment e.g. plasma screen
TV sets etc. be positioned on the wall above the appliance. The appliance is
designed to be wall mounted alone and not in conjunction with any type of
combustible fire surround. No combustible shelves should be positioned on
the wall above the appliance. It should be established that any mirrors or
picture frames etc. to be positioned on the wall above the appliance are able
to withstand prolonged exposure to moderate heat and moisture before
proceeding with their installation.
The back of the appliance may be installed directly onto a combustible wall,
providing it is relatively flat and does not interfere with the various vent holes
in the back panel of the appliance. The wall must be structurally sound and
constructed from a material capable of withstanding moderate heat. Finished
plaster, conventional wall paper and dry-lined plasterboard are examples of
suitable materials. Materials such as flock, blown vinyl and embossed paper
which are sensitive to even small amounts of heat should be avoided as
scorching and or discoloration may occur over time.
If the appliance is to be mounted on a dry-lined wall or a timber framed
construction wall then the integrity and ability of the wall to carry the weight
of the appliance must be confirmed. It is important in these circumstances
that any vapor control barrier is not damaged, and that any structural
members of the house frame are not damaged.
The appliance may be positioned as close to a solid floor (i.e. stone, wooden
laminate etc.) as the particular design of fire frame permits, however it is not
permitted to install the appliance within 4” of carpet, rugs or fabric materials
of any kind. This dimension is measured vertically to the bottom of the
appliance frame.
4
6.0 COMBUSTION AND VENTILATION AIR - continued
WARNING: IF THE AREA IN WHICH THE HEATER MAY BE
OPERATED IS SMALLER THAN THAT DEFINED AS AN
UNCONFINED SPACE OR IF THE BUILDING IS OF
UNUSUALLY TIGHT CONSTRUCTION, PROVIDE ADEQUATE
COMBUSTION AND VENTILATION AIR BY ONE OF THE
METHODS DESCRIBED IN THE NATIONAL FUEL GAS CODE,
ANSI Z223.1/NFPA 54, SECTION 5.3 OR APPLICABLE LOCAL
CODES.
7.0 SITE REQUIREMENTS
4.
Compare the maximum BTU/Hr the space can support with the
actual amount of BTU/Hr used.
_______ BTU/Hr (max. the space can support)
_______ BTU/Hr (actual amount of BTU/Hr used)
Example:
61,440
BTU/Hr (max. the space can support)
67,000 BTU/Hr (actual amount of BTU/Hr used)
WARNING: DO NOT USE A BLOWER INSERT, HEAT
EXCHANGER INSERT OR OTHER ACCESSORY NOT
APPROVED FOR USE WITH THIS HEATER.