Trane Gas Unit Heaters カタログ
14
UH-PRC002-EN
Application Considerations
Beyond satisfying the codes, vents should be positioned away from shrubs and plants that might
be affected by unseasonable warming by the exhaust. Sidewall vents release a considerable
amount of water vapor that may condense on cold siding, adversely affecting painted surfaces.
Placing these vents in locations that get natural air circulation from prevailing winds may help to
reduce these negative effects.
be affected by unseasonable warming by the exhaust. Sidewall vents release a considerable
amount of water vapor that may condense on cold siding, adversely affecting painted surfaces.
Placing these vents in locations that get natural air circulation from prevailing winds may help to
reduce these negative effects.
Separated Combustion Venting
Another form of mechanical venting includes those unit heaters that use a powered exhaust also
to pull in outside air. Most often found on condensing furnaces, separated combustion does not
use room air for combustion. Instead these unit heaters use a second run of pipe to supply fresh
outdoor air.
to pull in outside air. Most often found on condensing furnaces, separated combustion does not
use room air for combustion. Instead these unit heaters use a second run of pipe to supply fresh
outdoor air.
The separated combustion approach offers several advantages. First, it does not use warm indoor
air to fire the unit heater. This saves energy by avoiding drawing unheated make-up air into the
living space. Second, the unit heater has an unlimited source of air for combustion. In many of the
new super insulated buildings appliances can be starved for combustion air. In contaminated
atmospheres the use of separated combustion unit heaters assures that the heat exchanger sees
only non-corrosive air.
air to fire the unit heater. This saves energy by avoiding drawing unheated make-up air into the
living space. Second, the unit heater has an unlimited source of air for combustion. In many of the
new super insulated buildings appliances can be starved for combustion air. In contaminated
atmospheres the use of separated combustion unit heaters assures that the heat exchanger sees
only non-corrosive air.
When positioning the intake and exhaust vents on separated combustion equipment, the intake
and outlet must mount on the same outside surface. This ensures that any wind effects balance out.
Remember to keep the vents at least 18” apart to avoid drawing exhaust air into the intake air.
and outlet must mount on the same outside surface. This ensures that any wind effects balance out.
Remember to keep the vents at least 18” apart to avoid drawing exhaust air into the intake air.
With Trane’s separated combustion unit heaters intake air and exhaust air run through standard
24-gauge galvanized pipe. Remember that separated combustion unit heaters still have high vent
24-gauge galvanized pipe. Remember that separated combustion unit heaters still have high vent
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Heat
2. Fumes
3. Humidity
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