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Q: How many square feet will a whole house humidifier effectively humidify?
A: offers a wide range of whole house humidifiers that can humidify anywhere between 3,000 and 4,200 square feet. These areas are typically tightly constructed with efficient central units.

Q: Should I let my Aprilaire humidifier run 24 hours?
A: It is recommended that you let your humidifier run all day and night; however, there are humidifiers that are programmed to automatically adjust to maintain the humidity level you set. In fact, the Aprilaire 600 humidifier, can closely monitor the area's humidity and automatically adjust to your desired settings. You should check your humidifier frequently to make sure it is operating properly, but most of these humidifiers work closely with your central system for optimal performance and little maintenance.

Aprilaire 400A Q: How much water does the standard Aprilaire humidifier or Lennox humidifier use?
A: Depending on the model and square footage of your home, most of our whole house humidifiers use anywhere between 12 and 18 gallons. You should check the water level in your humidifier to make sure it is operating at its full potential.

Q: Why are these whole house humidifiers better than portable humidifiers?
A: Portable humidifiers are typically only useful for humidifying one room, not an entire home. They require constant refilling and maintenance. Our whole house humidifiers, like the Aprilaire 600M, do all of the work for you and rarely need much attention and they humidify your entire home for maximum comfort.

Q: Do I need a professional to perform maintenance on my Aprilaire humidifier or can I do it?
A: We recommend having a highly trained professional assist with any maintenance. While you may be able to do some of the standard maintenance, it is best to have a professional do the rest. However, these units are constructed in such a manner that you typically only have to worry about maintenance once per year.

Q: Where can I find any necessary Aprilaire parts, like a water panel?
A: offers a complete selection of Aprilaire parts at greatly reduced prices.