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  • Description
  • Characteristics
  • Downloads
  • Dimensions
  • The destratificators are used in industrial workshops, stocks, supermarkets, exhibition and concert halls, closed sport halls, etc.
  • The destratificators are recommended for use in large premises above 5 m height where warmer air due to natural air convection is accumulated closer to ceiling whereas air temperature in the occupied area (2 m above floor level) remains lower.
  • The destratificator consists of an axial fan that is attached to the casing with anti-vibration mounts.
  • The DRF-OV and DRFI-OV destratificator casing is made of polymer-coated steel.
  • The DRFI-OV casing is perforated and has mineral wool insulation to attenuate sound produced by the axial fan.
  • The directing vanes are located at outlet from the DRFI-OV to provide a long linear air flow.
  • Warm air is accumulated above in the heated high premises.
  • Air temperature rises per 1 °C for each meter upwards, which results in heat losses through the roof.
  • The destratificators direct warm air accumulated under the ceiling to the occupied area. The temperature difference between a floor and a ceiling is minimized.
  • The destratificators are designed to reduce heat losses and heating costs.

The destratificator is mounted with an arched fixing bracket with position fixation pitch each 15° and a thread-connected mounting and a safety ropes, each 3 m long.

  • The destratificator is equipped with a single-phase asynchronous external rotor motor and an axial impeller.
  • The motors have built-in overheating protection with automatic restart.
  • The motors are equipped with ball bearing.
  • Ingress Protection Rating IP 44.
  • Step or smooth speed control with a thyristor or autotransformer speed controller.
  • One speed controller is able to control several destratificators on condition that the total power and operating current do not exceed the controller rated parameters.
  • The destratificator selection is based on the assumption that the destratificator operation distance correlates to the premise height as 1:1.25. Number of the destratificators to be installed in the premise is selected on the assumption that the total air capacity is 1 to 2 premise volume.
  • The destratificator is for indoor installation in weather-protected premises.
  • The destratificators are designed for mounting under a ceiling with a directing nozzle downwards.
  • The destratificator must be either rigidly fixed to a bearing structure or for suspended with a mounting kit supplied with the delivery.
  • The destratificator is connected to power mains via an external terminal box.
  • Electric connections and installations must comply with the product manual and a wiring diagram on the terminal block.
VENTS DRF-OV application example at a stock Uneven distribution of warm and cold air flows in the room without destratificators
Even distribution of warm and cold air flows in the room with destratificators
Parameter DRF-OV 350
Measurement unit
Engine Type 220В / 50Гц -
Phase 1 ˜
Voltage 230 V
Frequency 50 Hz
Current A
Sound pressure level at 3 m distance 60 dBА
Air capacity 2500 m³/h
Power consumption 140 W
RPM 1380 min-1
Maximum transported air temperature 60 °С
Protection rating IP X4 -
Weight 9.7 kg
Air reach distance Air reach distance 10 mm
Range of air stream Range of air stream 10-13 -
Influence area Influence area 78-133
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Download image "VENTS DRF-OV" for your website (png 318.77Kb)
Download high quality image "VENTS DRF-OV" (psd 1.45Mb)
Download image "VENTS DRFI-OV" for your website (png 301.37Kb)
Download high quality image "VENTS DRFI-OV" (psd 1.27Mb)
"VENTS DRF-OV and DRFI-OV" product description 02-2016 (pdf 225.41Kb)
"VENTS DRF-OV and DRFI-OV" user's manual 05-2021 (V96EN-05) (pdf 1.13Mb)
Parameter Value Measurement unit
∅D 442 mm
ØD1 360 mm
ØD2 9.1 mm
A 490 mm
H 705 mm
H1 516 mm
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