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Rheem RXHM-BC76H - Return Air Plenum, Fully Modulating Mixing Box for Commercial Air Handler

This product is no longer available for purchase.
Comparable Product:


Return Air Plenum - The purpose of the mixing box is to use outside air for cooling whenever possible to minimize compressor operating time.

The mixing box contains the following controls:
  • TRANSFORMER (40VA) - Furnishes 24V AC to damper motor through economizer relay, mixed air sensor and potentiometer. The primary of the transformer is either 115V or 230V (consult wiring diagram).
  • DAMPER MOTOR (DM) - A 24V motor to drive the damper blades open and closed. The 24V power drives the motor in one direction and an internal spring drives the motor in the opposite direction.
  • ENTHALPY CONTROL (EC) - An adjustable single pole, double throw temperature and humidity (enthalpy) sensing relay that determines if outside air can be used instead of mechanical cooling.
  • MIXED AIR SENSOR (MS) - A non-adjustable thermistor that senses the mix of return air and fresh air and signals the damper motor to move the two dampers to maintain the proper mix of air.


NameRheem RXHM-BC76H - Return Air Plenum, Fully Modulating Mixing Box for Commercial Air Handler
Gemaire Item NumberRXHMBC76H
Manufacturer Product NumberRXHM-BC76H
SKU - PIM Number1389111961441
ERP Number106761
Unit of MeasureEA
Weight200.0 Pounds (Lb)
Length38.0 Inches (In)
Width37.0 Inches (In)
Height63.0 Inches (In)
Hazardous MaterialNo
EPA Cert RequiredNo
Country of OriginUSA
GEM - Case Quantity
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