Product Description
Outside Air Ducting - 3" to 4'' Increaser
Hearthstone 90-53308
Hearthstone 90-53308
Allows for a 4" outside air vent to be connected to a 3" Outside Air Adapter, both sold separately. For use with the below units
- Hearthstone Castleton with 90-53300 adapter
- Hearthstone Heritage with 90-53220 adapter
- Hearthstone Mansfield with 90-53220 adapter
- Hearthstone Equinox with 93-53500 adapter
- Hearthstone Bennington with 93-53500 adapter
- Hearthstone Manchester with 93-53500 adapter
- Hearthstone Green Mountain with 96-53400 adapter
- Hearthstone Shelburne with 96-53400 adapter
- Hearthstone Craftsbury with 96-53400 adapter
- Ambiance Hipster with 96-53400 adapter
When considering placement of the duct on the inside and outside of the house, keep in mind the need to avoid wiring and structural members of the house. Locate the termination of the duct on the outside wall in such a manner as to preclude the possibility of obstruction by snow, leaves, or other materials. Screen the outside termination with a ¼” x ¼” mesh rodent screen, and cover it with a rain/wind proof hood. Periodically check the screen to ensure it is not blocked by debris such as spider webs or leaves
