General Information
6
Mechanical Room
During the early s t ages of new home design, we recommend that proper
consideration be given to constructing a s eparate mechanical room dedicated to gas
or oil fired equipment including domestic hot water storage tanks.
The boiler must be located in a heated indoor space, near a floor drain, and as close
as possible to the vertical chimney or vent.
Whenever possible install boiler near an outside wall so that it is easy to duct fresh
air directly to the boiler area. In addition, do not use exhaust fans in the boiler room
and do not install the boiler in rooms with refrigeration equipment. This equipment
requires uncontaminated outside air for safe operation - do not install where
chemicals are stored or in a room with negative pressure. See section entitled
“Combustion Air Supply” for further details regarding the above.
Locate boiler on flooring capable of supporting the weight of the boiler filled with
water. Ensure that the boiler location does not interfere with the proper circulation
of combustion and ventilation air within the mechanical room.
The maximum room temperature of the mechanical room where the boiler is located
must not exceed 104°F / 40°C.
Combustion Air Supply
General (gas- and oil-fired installations)
This equipment requires fresh air f or
safe operation and must be installed
ensuring provisions for adequate
combustion and ventilation air exist.
Provisions for combustion and
ventilation air must be made in
accordance with applicable local codes.
In the absence of local codes, use:
H CSA B-139 for oil installations in
Canada
H CAN/CGA-B149.1 or .2 for gas
installations in Canada
H ANSI Z223.1 section 5.3 National
Fuel Gas Code for gas installations in
the US
H NFPA 31, Standard for the installation
of Oil Burning Equipment in the US
Always use latest editions of codes.
Whenever possible, install boiler near an
outside wall so that it is easy to duct
fresh air directly to the boiler area.
Refer to national codes and table below
for duct sizing and allowable lengths.
Round ducts can be used.
The boiler location must never be under
negative pressure. Exhaust fans, attic
fans, or dryer fans may cause air to be
exhausted at a rate higher than air can
enter the structure for safe combustion.
5167 404 v1.9
Failure to provide an adequate supply
of fresh combustion air can cause
poisonous flue gases to enter living
space. Flue gases entering living
space can cause carbon monoxide
poisoning which can result in severe
personal injury or loss of life.
WARNING
Nevercovertheboilerorstoredebris
or other materials near the boiler, or
in any way block the flow of
adequate fresh air to the boiler. Never
cover the combustion air opening or
put anything inside draft hood. Advise
system operator/ultimate owner
accordingly.
WARNING
The boiler must not be located in
areas or rooms where chemicals are
stored, or aggressive vapors (i.e.
bleach, hair spray, methyl chloride,
carbon tetrachloride or
perchloroethylene) or high dust levels
or humidity levels are present. Heat
exchanger corrosion might occur and
reduce the lifetime of the boiler
significantly. If above criteria are not
properly observed and boiler damage
results, any warranty on the complete
boiler and related components will be
null and void.
WARNING
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