The Model 400A bypass humidifier is a high-capacity, water-conserving
humidifier (0.70 gallons evaporated per hour) incorporating a water
recirculation system for use where drain facilities are not accessible or
available. It uses 100% of the water that goes into the unit. Automatically
adjust humidity levels based upon outside air temperature with Automatic Digital
Control and remote sensing bulb. Humidifies up to 4,000 square feet if your home
is tight in construction. The Model 400A is also a good choice for homes with
heat pumps. Due to lower plenum temperatures the unit should be connected to
your hot water supply line. This humidifier can be installed on the supply or
return air ductwork. It is also left or right side reversible. Includes
automatic digital control humidistat, sensing bulb, two water pads, 110v to 24v
transformer, Digital Weather Station, and manufacturer's special instructional
DVD.
Automatic Digital Control Features
- Shows that the humidifier is operating
- Allows you to check relative humidity level
- Tells you when it's time to change the water panel
- Gives you service alerts
Digital Weather Station Features
- Easy to read digital display
- Shows indoor humidity levels
- Monitors indoor temperature
- Mounts on wall or sits on table, for placement anywhere in your home
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Maximum Coverage Area
Maximum coverage area means this humidifier will perform well for home
sizes up to the square footage indicated, provided that the home is "tight". A tight home is typically is one that is sealed well around
windows and doors and does not leak air to/from the outdoors. Note that
humidifiers will perform well for smaller homes as well since the
controller regulates the amount of humidity automatically to adjust to
home size. |
4,000 square feet |
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Width
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15.38 inches |
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Height
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15.75 inches |
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Depth
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10.25 inches |
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Warranty
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5 year(s) |
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Type
There are two basic humidifier types: bypass and power fan. Each simply uses a
different method to move air through them. Power fan humidifiers use a 110 volt
fan to move air through them. Bypass humidifiers do not have a fan, but instead
require a 6" duct to be connected to the side
and then to the opposite air duct system from the humidifier. That
means for bypass models that if the humidifier is installed on the
supply plenum, the 6" duct will connect to the humidifier and the
return plenum, and if the humidifier is installed on the return plenum,
the 6" duct will attach to humidifier and the supply plenum.
Both
humidifier types (bypass and power fan) will provide the same
benefits to you. The only difference is the technology used to do so.
The advantage to power fan models is since they do not require
additional ductwork, they can be installed faster and in tighter
spaces. The advantage to bypass models is that they cost a bit less. |
Bypass |
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Remote Sensing Bulb
A remote sensing bulb is a small (about 1/4" round) sensor that mounts
outside the home and connects by light gauge wire (18 to 22 gauge,
2-conductor) to the humidifier controller. This sensor provides
temperature readings to the computerized controller which allows the
humidifier to automatically adjust humidity levels in the home based on
outside air temperature. |
Included |
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Electrical Requirements
Humidifiers with 24 volt AC electrical requirements obtain such by
connecting to either 24VAC from the furnace, or by adding a transformer
to the furnace to create such. Most installations can use the 24VAC
that is already accessible in the furnace.
Humidifiers
with 110 volt AC electrical requirements simply plug into a standard
outlet (receptacle) and require no special wiring for this part. It is
recommended, however, that the outlet/receptacle be dedicated for the
humidifier, and that it can be shut off by the same power safety switch
that turns off the furnace.
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24V |
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Bypass Duct Diameter
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6 inches |
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Water Feed Rate
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3 Gallons/Hour |
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Plenum Opening Size
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10W x 12.75H inches | | | | | | | |
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