Number of Results: 67
The BD-300 series backdraft dampers mount vertically to allow horizontal airflow and prevent reverse airflow. Dampers in this series: BD-300 with a flange on intake, BD-320 with a flange on discharge and BD-330, which does not have a flanged frame. All dampers in this series open by air pressure di
The BD-100 backdraft damper mounts horizontally to allow vertical airflow up and prevent reverse airflow down. The dampers are open by air pressure differential and closed by gravity. Pressure: Up to 2 in. wg Velocity: Up to 1500 fpm Temperature: Up to 180°F Accessory to power roof ventilators and
The BD-90 backdraft damper mounts horizontally to allow vertical airflow up and prevent reverse airflow down. The dampers are open by air pressure differential and closed by gravity. Pressure: Up to 2 in. wg Velocity: Up to 1500 fpm Temperature: Up to 180°F Accessory to power roof ventilators and c
The WD-340 backdraft damper bolts to the flanged outlet of Greenheck model USF utility blowers. Motorpacks are optional. Pressure: Up to 2 in. wg Velocity: Up to 2500 fpm Temperature: Up to 180°F
The WD-400 backdraft damper series are non-motorized that mount vertically for intake air or horizontally to allow vertical airflow down and prevent reverse airflow. Models WD-400 and 410 have no flange, model WD-420 has a flange on discharge, and WD-430 has a flange on intake. The dampers open usi
The WD-300 series backdraft damper prevents reverse airflow in horizontal exhaust applications. Model WD-300 has a flange on intake, model WD-320 has a flange on discharge and model WD-330 does not have a flanged frame. Dampers open using air pressure differential and close by gravity. Optional mot
The WD-200 series backdraft dampers are motorized to open when energized and the spring return closes when de-energized. Model WD-200 has no flange, model WD-210 has a flange on the motor side and model WD-220 has a flange opposite the motor. The WD-200 series is for horizontal or vertical mounting
The WD-100 series backdraft dampers mount horizontally to allow vertical airflow up and prevent reverse airflow. Model WD-100 has no flange, model WD-110 has a flange on the discharge side, and model WD-120 has a flange on the intake side. These dampers open using air pressure differential (assiste
A straight-sided, vented roof curb for use on flat roofs in kitchen applications. 20, 24, 26, or 30 in. height, varies by size 2 or 5 in. flashing flange
A straight-sided roof curb for use on ridged or double-pitched roofs in high wind and seismic applications. 8 to 24 in. heights 2 or 5 in. flashing flange
A straight-sided roof curb for use on pitched roofs in high wind or seismic applications. 8 to 24 in. heights 2 or 5 in. flashing flange
A straight-sided roof curb for use on flat roofs in high wind and seismic applications. 8 to 42 in. heights 2 or 5 in. flashing flange
A canted roof curb for use on flat roofs. Includes a wood nailer for the attachment of roofing material. The cant aides in transition of roofing material. 8 to 20 in. heights 1 1/8 in. flashing flange
A straight-sided roof curb for use on pitched roofs. Includes a wood nailer for the attachment of roofing material. 12 to 24 in. heights 2 in. flashing flange
A straight-sided roof curb for use on ridged or double-pitched roofs. Includes a wood nailer for the attachment of roofing material. 12 to 24 in. heights 2 in. flashing flange
A raised canted roof curb for use on flat roofs. Includes a wood nailer for the attachment of roofing material. The raised cant is available up to 6 in. tall for deck insulation. 8 to 20 in. heights 1 1/8 in. flashing flange
A straight-sided, vented roof curb for use on pitched roofs in kitchen applications. 20, 24, 26, or 30 in. height, varies by size 2 or 5 in. flashing flange