Dehumidifier – Aprilaire 1820

Item:  AP1820



Aprilaire 1820 Dehumidifier (includes adapter kit)

The Aprilaire 1820, as part of the ATMOX system, offers the best crawl space moisture control system through the use of smart ventilation and dehumidification. The dehumidifier is effective in quickly reducing moisture levels within the crawl space. This is particularly true in months with high levels of heat and humidity. In larger crawl spaces, a dehumidifier may have difficulty drying out far corners away from the dehumidifier. To solve this problem, use the ATMOX internal fans with the dehumidifier to assist air movement to the dehumidifier to improve the drying reach. You don’t want to dry out the area near the dehumidifier but neglect the other parts.

ATMOX product design emphasizes energy efficiency. We believe moisture control systems should be effective and inexpensive to operate. Dehumidifiers typically have high energy usage. However, with the use of the ACE Controller, the dehumidifier will run only at optimal times. Both vented and encapsulated crawl spaces can benefit from an ATMOX system.

The Aprilaire 1820 dehumidifier design is for small spaces such as crawl spaces. It has a large capacity water removal of 70 pints per day. The internal fan is 200 CFM. The auto restart allows the dehumidifier to automatically restart after a power outage.



  • 70 pints/day at 80 degrees F
  • Dimensions: 12.5 x 12.5 x 25 inches
  • Operating Temperature: Minimum of 50 degrees F and Maximum of 104 degrees F

Spec Sheet – Aprilaire 1820 Dehumidifier