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The 37S Series Low Profile terminals are designed for shallow ceiling plenum applications and therefore limited to 11" (279) in height. Shallow plenums are common where zoning requirements limit building height. When building height is constrained, building designers will maximize the number of floors by reducing the distance between floors, requiring low profile products like the 37S Series.


  • 20 ga. (1.00) galvanized steel construction.
  • 16 ga. (1.6) galvanized steel inclined opposed blade primary air damper. 45O rotation, CW to close. 1/2" (13) dia. plated steel drive shaft. An indicator mark on the end of the shaft shows damper-position. Leakage is less than 2% of nominal flow at 3" w.g. (750 Pa).
  • Perforated baffle on primary air discharge optimizes mixing with induced air for rapid and effective temperature equalization. The baffle also converts low frequency primary air valve generated sound into more readily attenuated higher frequencies.
  • Pressure independent primary airflow control.
  • Multi-point averaging flow sensor.
  • Terminal is field flippable, providing left or right installation connections. Refer to IOM for details.
  • Access panels are full size on top and bottom of terminal for ease of maintenance and service.
  • Energy efficient PSC fan motor with thermal overload protection.
  • Motor blower assembly mounted on special 16 ga. (1.6) angles and isolated from casing with rubber isolators.
  • Adjustable solid state fan speed controller with minimum voltage stop.
  • Hinged door on fan controls enclosure.
  • 1/2" (13), dual density insulation. Exposed edges coated to prevent air erosion. Meets requirements of NFPA 90A and UL 181.
  • Available with electric or hot water supplementary heat.
  • All controls are mounted on exterior of terminal providing ready access for field adjustment.
  • Each terminal factory tested prior to shipment.
  • Single point electrical and/or pneumatic main air connection.
  • Discharge opening designed for flanged duct connection.
  • Full primary air valve low voltage enclosure for factory mounted DDC and analog electronic controls.

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