CVPFD: Constant Volume Regulator in a UL Rated Assembly

SubmittalCVP Performance CurvesCVP Attribute PageCVP Selection Guide Constant Volume Slide Deck


The CVP Plus is an enhanced Constant Volume Regulator that accurately controls the maximum volume of air supplied into and exhausted from a space.  The CVP Plus has an innovative spring-loaded damper that reacts to the air velocity moving through.  As velocity increases, the blade moves toward closed to restrict the free area and deliver only the desired volume of air.  The CVP Plus is accurate to ± 10% of setpoint in systems with a pressure range of 0.2” – 2.0 InWC.   Maximum volume is easily established by setting the adjustment arm to the desired air volume, calibrated in CFM, on the front of the regulator.   

The CVP Plus uses no electricity.  It is constructed of anti-microbial resins to resist the growth of mold and bacteria.  Rubber gaskets around the perimeter of the damper ensure a tight, low leak seal when installed in round duct.  Accurately regulating the volume of air supplied to and exhausted from a space will save energy, improve comfort, and help achieve the indoor air quality requirements of today’s ventilation guidelines.

The CVR Plus pressure range  0.2 to 2.0 InWC.

The CVPFD features a heavy duty 24ga galvanized steel enclosure 6” or 8” deep to accommodate a fire damper.  See CVP Specification Table for enclosure details.  Custom sizes are available.


Now Available with a White Aluminum Grille



Additional information

Housing Material

Anti-Microbial ABS

Sheet Metal Fitting 6" or 8" Deep

24 ga.

Pressure Range

0.2 to 2.0 InWC

CVP04 (4" Size)

25 to 130 CFM

CVP05 (5" Size)

25 to 130 CFM

CVP06 (6" Size)

50 to 275 CFM

Perimeter Gasket

T-Shaped for a snug fit

Country of Origin

100% American Made

UL 2043 Tested and Classified

Heat release rate and smoke optical density

Lab Calibrated Adjustment Slider

ANSI/AMCA 500-D-12

UL 555C Dynamic Fire Damper

Reading ± 10% of the Set-Point

UL Assembly Available For Standard Sizes:

Grille or Not

Supply or Exhaust