Gaps will then occur, permitting cold outside air to
infiltrate into the house. Heated, parched air causes separation of
wood in floors, trim and furniture, wall and ceiling cracks, plant
damage and annoying static shock. These are all by-products of dry
air.
Proper humidity reduces heating costs by stopping wood
shrinkage, which reduces cold air infiltration around door and window
frames. In turn, you'll feel warmer at lower temperature. You can
actually dial down your thermostat and still be comfortable.
Arrow carries a wide variety of humidifiers such as the Aprilaire and
Generalaire. You can have a choice of three types: standard drum-type,
flow-through type and power humidifiers.
Bypass Humidifier Operation (flow-through)
The humidifier can be mounted on either the supply or
return plenum. When the furnace operates, negative air pressure is
created that draws air from the supply side of the furnace to the
return side. This pressure draws the heated air past the
moisture-treated water panel evaporator, providing comforting,
humidified air throughout the home. See illustration above left.
Power Humidifier Operation
The humidifier fan draws dry, heated air from the
furnace duct through the water panel evaporator. The moisture-treated
air then wraps around both sides of the water panel and returns
through the side louvers into the furnace's air flow, providing
comforting, humidified air to the entire home. See illustration
above right.
Typical installations:
