Product Description

Aprilaire 6819 Bottom Mount 24 x 8 Damper Assembly. Operates on 24 volts AC. Springs open with no power and closes when you apply 24 volts to the motor. Installs from the bottom up by cutting a hole in the bottom of the supply duct and inserting it in the hole.

The manufacturer is sometimes referred to as April Aire, Aprilair, April Air but is correctly spelled Aprilaire.