Aprilaire 500M Humidifier

The most economical humidifier in Aprilaire's line. This is a bypass humidifier which you can mount to the cold air return or supply plenum.

Choose this one for: 750 sq ft (loose insulation), 1500 sq ft (average house), 3000 sq ft (tight house).

The "M" version....for Manual, does not come with the shown digital controller. Order the 500A to get that feature.

Plenum opening required: 9(3/8)" wide x 9(1/2)" high. Unit size: appx 13" wide, 12(3/4)" high, 9" deep.

Many misc parts such as: 6" discharge duct, drain tubing, low voltage wiring, and the #50 furnace interface relay (not always needed) not included.