Large Diameter Dampers

Motorized inline dampers for commercial and large residential duct runs from 6 to 30 in., plus an extended shaft body for a field-selected actuator. Measure every branch before you order: the largest duct decides the actuator family.

Pick by control type

• On/off, 24 Vac: the HAC-50/51 quarter-turn, 6 to 14 in., with the relay standard on the HAC-51, or the HAC-40 with a Belimo TFB24, 6 to 20 in.
• On/off, 100 to 240 Vac: the HAC-44 with a Belimo TFB120, 6 to 20 in.
• Modulating, 2 to 10 VDC: the HAC-43 (spring return) or the HAC-60 (holds last position).
• Floating point: the HAC-34, HAC-30, HAC-35 and HAC-70. See BAS compatible dampers for how they differ.
• Fire and smoke actuator: the HAC-90 and HAC-80. The damper assembly is not UL listed.
• Flue: the HAC-F large diameter, 10 to 30 in., and the HAC-FS, 14 to 30 in.
• Your own actuator: the HAC no-motor extended shaft body, 4 to 30 in., with a 2.50 or 3.75 in. shaft extension specified at order.

Certification above 9 in.

The HAC-30, HAC-40, HAC-43 and HAC-F large diameter series are CSA certified up to 12 in. The HAC-50/51, HAC-FS and the other models here are not certified. Confirm AHJ requirements before ordering on code-required applications.

Related: zone dampers, Belimo actuator dampers, flue dampers and custom rectangular dampers.

Questions on sizing, voltage or wiring? Call technical support at 1-800-661-7382, free for contractors and installers. Sold through HVAC wholesalers across Canada, or order direct here.