| Backdraft damper, vertical mount, Model BD-320, 14 In Sq, Flange on Discharge, Performance up to 1,500 ft/min | $148.00 | | |
| Backdraft damper, vertical mount, Model BD-320, 16 In Sq, Flange on Discharge, Performance up to 1,500 ft/min | $170.00 | | |
| Backdraft damper, vertical mount, Model BD-320, 18 In Sq, Flange on Discharge, Performance up to 1,500 ft/min | $179.00 | | |
| Backdraft damper, vertical mount, Model BD-330, 10 In Sq, No Flange, Performance up to 1,500 ft/min | $114.00 | | |
| Backdraft damper, vertical mount, Model BD-330, 12 In Sq, No Flange, Performance up to 1,500 ft/min | $122.00 | | |
| Backdraft damper, vertical mount, Model BD-330, 14 In Sq, No Flange, Performance up to 1,500 ft/min | $132.00 | | |