Aprilaire Model 400 Humidifier?

Hi, I have installed 600 model about 3 years ago. Working fine. I have two pads one in use and cleaned spare one on hand always. That's it.

responding to

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 jar fill.

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.

Good luck

Brad Nielsen

Terri Smith wrote:

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