The Master Flow 20 in. Slide-In Damper for Evaporative Coolers limits heat loss when an evaporative cooler is not in use. This damper is constructed from galvanized steel for durability.
- Slides into most evaporative colors
- Made of galvanized steel for durability
- 20 in. W for easy storage in the summer
- Cuts off leaking heat to winterize evaporative coolers
- Galvanized steel construction
- Use slide-in-damper to winterize evaporative cooler unit
- Helps cut off heat leaking out through from the house, through the unit in the wintertime