Installing Your Furnace
Locating Wall Furnace & Thermostat (continued)
The thermostat should be sensing average room temperature;
avoid the following:
HOT SPOTS:
COLD SPOTS:
Concealed pipes or ducts
Concealed pipes or ducts
Fireplaces
Stairwells – drafts
Registers
Doors – drafts
TV sets
Unheated rooms on
Radios
other side of wall
Lamps
Direct sunlight
DEAD SPOTS
Kitchen
Behind doors
Corners and alcoves
After picking a location that meets the requirements, check the
walls, attic and roof to make sure there are no obstructions such
as pipes, electrical wiring, etc., which could interfere with the
installation of the furnace or vent pipe. If required, move them or
pick a new location.
WARNING:
Danger of property damage, bodily
injury or loss of life. Do not install the furnace in any
area where oxygen is in use.
Combustion & Ventilation Air
WARNING:
Danger of property damage, bodily
injury or loss of life. The furnace and any other fuel-
burning appliances must be provided with enough
fresh air for proper combustion and ventilation of
flue gases. Most homes will require that outside air
be supplied into the heated area.
The high cost of energy for home heating has brought about new
materials and methods used to construct or remodel most current
homes. The improved construction and additional insulation has
reduced the heat loss and made these homes much tighter
around windows and doors so that infiltrated air is minimal. This
creates a problem to supply combustion and ventilation air for
gas-fired or other fuel burning appliances. Any use of appliances
that pull air out of the house (clothes dryers, exhaust fans,
fireplaces, etc.) increases this problem and appliances could be
starving for air.
The combination of a tight energy efficient home with the use of
exhaust fans, fireplaces, clothes dryers, and gas appliances result
in more and more air being drawn from the house until fresh air
may be sucked back into the house down a furnace flue or
fireplace chimney. Carbon monoxide can be the result. Carbon
monoxide (CO) is a colorless, odorless gas produced when fuel is
not burned completely or when the flame does not receive
sufficient oxygen. Automobiles, charcoal, wood fires and
improperly vented or air-starved coal, oil and gas furnaces or
other appliances can produce carbon monoxide.
Do not install furnace in the same room or near a wood solid fuel
burning fireplace.
BE AWARE OF THESE AIR-STARVATION SIGNALS:
1.
Headaches, nausea, dizziness.
2.
Excessive humidity shown by heavily frosted windows or a
moist "clammy" sensation.
3.
Fireplace smoke fills the room or will not draw.
4.
Furnace flue backs up.
AIR REQUIREMENTS
The requirements for providing air for combustion and ventilation
are listed in the National Fuel Gas Code NFPA 54/ANSI Z223.1 (in
Canada: CAN/CGA B149). Most homes will require that outside
air be supplied to the heated area by means of ventilation grilles
or ducts connecting directly to the outside or spaces open to the
outdoors such as attic or crawl space. The only exception is when
the heated area meets the requirements and definitions for an
unconfined space with adequate air infiltration.
All air openings and connecting ducts must comply with the
following:
If the furnace is installed in an area with another gas appliance(s),
the total input rating of all appliances must be considered when
determining the free area requirements for combustion and
ventilation air openings.
Ducts must have the same cross-sectional area as the free area
of the openings to which they connect. The minimum dimension
of rectangular air ducts must not be less than 3-inches in length or
height.
Locating Wall Furnace & Thermostat (continued)
WARNING:
Danger of property damage, bodily injury or loss of life. Even when a house meets
requirements for unconfined space with adequate air infiltration, it is recommended that a fresh air intake be
installed to lessen the possible dangers from any future changes on the home
