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LOCATING YOUR HEATER FOR SAFE PROPER COMBUSTION
Carefully select the location of your new heater. For your safety and for proper heater operation,
you must provide an abundant supply of combustion air and install a proper vent. The heater
may still operate even when improperly installed. However, an improper installation will be less
efficient and may damage the heater. Improper installation can even result in human sickness or
death due to oxygen deprivation and carbon monoxide poisoning. Follow the guidelines below:
Appliances located in confined spaces:
The confined space shall be provided
with two permanent openings, one com-
mencing within 12 inches of the top and
one commencing within 12 inches of the
bottom of the enclosure. Each opening
shall have a minimum free area of one
square inch per:
-1,000 Btu/hr if all air is taken from inside
the building.
-2,000 Btu/hr if all air is taken from the
outside by horizontal ducts.
-4,000 Btu/hr if all air is taken from the
outside by direct openings or vertical
ducts.
Louvers, grills and screens have a block-
ing effect. If the effective free area is not
known, assume 20% to 25% for wood lou-
vers and 60% to 75% for metal louvers.
Refer to the National Fuel Gas Code for
complete information. In buildings of tight
construction, all air should be taken from
outside.
5. Place your heater as close to a vent or chim-
ney as possible. Your hot water lines should be
kept short to save energy. It is always best to
have hot water lines insulated.
6. Having a floor drain or sink nearby is handy in
case you need to drain water from your heater.
7. Place the heater in a location where water
leaks will do NO DAMAGE to adjacent areas or
lower floors. CONTROLLED ENERGY CORP
IS NOT RESPONSIBLE FOR WATER DAM-
AGE.
1. You must not install this appliance in bathrooms,
bedrooms, unvented closets or any occupied
rooms normally kept closed.
2. Simultaneous operation of appliances such as
exhaust fans, ventilation systems, clothes dryers,
fireplaces or wood stoves may create a vacuum
effect in your home. This can cause dangerous
combustion by-products to spill back into your
home rather than venting to the outside through
the flue.
3. A simple test for proper ventilation is to
inroduce smoke (as from a candle) near the lou-
vers on the front of the heater. Have all appli-
ances mentioned in the above paragraph oper-
ating at the same time. Have all doors and win-
dows to the outside shut. If the heater does not
suck the smoke into the louvers while the heater
is operating, you need to supply additional com-
bustion air to the heater and/or improve the vent
system.
4. Observe the following instructions concerning
additional combustion air.
Appliances located in unconfined spaces:
a) An unconfined space is one in which
the volume is greater than 50 cubic feet
per 1000 Btu per hour of the combined
rating of all appliances installed in the
space. That would be 6250 cubic feet
for the AquaStar 125 alone.
b) In unconfined spaces in buildings of
conventional frame, masonry, or metal
construction, infiltration is normally ad-
equate to provide air for combustion, ven-
tilation, and dilution of flue gasses.