The Aprilaire 400 unit is Aprilaire's answer to a whole house humidifier
when there is no drain avaialbe.
Aprilaire's drain through units are designed to flush away most of the
lime deposits from the evaporated water so it is a \"self cleaning\"
feature so to say. The amount of water going to the unit will vary
depending on the unit either 3 gallons per hour or at most 6 gallons per
hour and that is if the humidifier is running 100% of the time. Typically
the humidifier will run about half that so at most 1.5 to 3 gallons per
hour could be consumed by the humdifier.
You can check the water flow by timing how long it takes to fill a quart
jar at the drain. If the water feed is 3 gallons per hour it will take
about 5 minutes, if 6 gallons per hour it will take 2.5 minutes. Make
sure the unit is running about a minute or two before you time the quart
The Aprilaire 400 is a good unit but does require changing the water panel
mid season versus the drain through units only need to change the panel at
the beginning of the season.
Terri Smith wrote:
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