Flat Airtite with Damper
- 400AD
- Flat design allows for installation on trunk lines or starting collars on plenums. Equivalent length supply or return 40' and add 0.03 pressure loss device.
- Sizes 4" - 9"; available 12 per box.
- Sizes 10" - 16"; available 6 per box.
- Sizes 18" - 20"; available 4 per box.