Varitherm VAV Modulating Ceiling Diffuser

The Varitherm self-modulating plaque diffuser provides optimal thermal comfort through integrated thermal sensors that continuously monitor room temperature to modulate the integrated damper. Damper modulation is done mechanically with a thermally powered wax actuator, eliminating the need for any electrical or controls wiring and making installation quick and easy.
Manufacturer: Price Industries
Availability:  10000 in stock


Installation, Operation, and Maintenance Manual


  • Factory Tolerance 1/16"
  • Standard Range: 70 TO 78°F
  • Factory Default Settings: 74°F
Products specifications
Attribute name Attribute value
Ceiling Module 24" x 24"
Standard Construction Steel
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Pressure Relief Collar

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The Pressure Relief Collar (PRC) slips over a diffuser inlet to provide a simple and inexpensive solution to control inlet static pressure. To limit excessive diffuser noise and pressure drop, duct static pressure should be below 0.25 in. w.g. A PRC is recommended for applications where duct pressure may exceed the recommended limit, such as installations with a constant volume air handler where multiple prodigy units are operating with a mostly closed damper. As duct pressure increases past 0.25 in. w.g. calibrated shutters gradually open to release excess air into the ceiling plenum.