14
02/23
7037-807C
Negative pressure results from the imbalance of air available
for the appliance to operate properly. It can be strongest in
lower levels of the house.
Causes include:
• Exhaust fans (kitchen, bath, etc.)
• Range hoods
• Combustion air requirements for furnaces, water
appliances and other combustion appliances
• Clothes dryers
• Location of return-air vents to furnace or air conditioning
• Imbalances of the HVAC air handling system
• Upper level air leaks such as:
- Recessed lighting
- Attic hatch
- Duct leaks
To minimize the effects of negative air pressure:
• Install the outside air kit with the intake facing prevailing
winds during the heating season
• Ensure adequate outdoor air for all combustion
appliances and exhaust equipment
• Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the appliance
• Avoid installing the appliance near doors, walkways or
small isolated spaces
• Recessed lighting should be a “sealed can” design
• Attic hatches weather stripped or sealed
• Attic mounted duct work and air handler joints and seams
taped or sealed
J. Negative Pressure
K. Frequently Asked Questions
CONTACT YOUR DEALER
for additional information
regarding operation and troubleshooting.
Visit
ISSUES
SOLUTIONS
Odor from appliance
When first operated, this
appliance may release an
odor for the first several hours.
This is caused by the curing
of the paint and the burning
off of any oils remaining from
manufacturing.
Metallic noise
Noise is caused by metal
expanding and contracting as
it heats up and cools down,
similar to the sound produced
by a furnace or heating duct.
This noise does not affect the
operation or longevity of the
appliance.
Whirring sound
If the optional blower has been
installed, the blower produces a
whirring sound which increases
in volume as the speed is
increased.
Table 14.1
Asphyxiation Risk.
• Negative pressure can cause spillage
of combustion fumes, soot and
carbon monoxide.
• Appliance needs to draft properly for safety.
WARNING
Fire Risk.
• DO NOT BURN GARBAGE OR
FLAMMABLE
FLUIDS
SUCH AS
GASOLINE, NAPHTHA OR ENGINE OIL.
• Do NOT burn treated wood or wood with
salt (driftwood).
• May generate carbon monoxide if burn
material other than wood.
May result in illness or possible death.
WARNING
Fire Risk.
Keep combustible materials, gasoline and
other flammable vapors and liquids clear
of appliance.
WARNING
• Do NOT store flammable materials in the
appliance’s vicinity.
• DO NOT USE GASOLINE, LANTERN FUEL,
KEROSENE, CHARCOAL LIGHTER FLUID OR
SIMILAR LIQUIDS TO START OR “FRESHEN UP” A
FIRE IN THIS APPLIANCE.
• Keep all such liquids well away from the appliance
while it is in use.
• Combustible materials may ignite.
