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  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Technical data
  • Designation key
  • Accessories
  • Air handling units VUT WH with water heater are the complete air handling units designed to provide both supply and exhaust ventilation with air filtering and heat recovery.
  • The exhaust air energy is used to heat up the supply fresh air through the heat exchanger.
  • All the models are designed for connection with Ø 125, 150, 160, 200, 250, 315 mm round ducts.
  • VUT WH – a range of compact energy saving air handling units (AHU) equipped with supply and exhaust centrifugal fans, cross-flow heat exchanger, water or glycol heater and air filters.

  • Two incorporated G4 panel filters for extract air ventilation are supplied with the unit.

  • The units are equipped with supply and exhaust centrifugal double-inlet fans with forward curved blades and built-in thermostat with automatic restart.
  • The electric motors and impellers are dynamically balanced in two planes.
  • The ball-bearings used with motors are designed for at least 40 000 hours operation and are maintenance-free.
  • The casing is made of aluminum-zinc compound with 25 mm thick mineral wool heat- and sound-insulating layer.
  • The heat exchangers have high efficiency and are made of polystyrol. The unit is also equipped with the drain pan for condensate drainage.

  • The water heater at outlet from the heat exchanger is designed for warming up of supply air up to the set level if heat recovery is not enough to attain the set supply air temperature.
  • The water heaters are designed for max. operating pressure 1.0 MPa (10 bar) and max. heat medium operating temperature 95 °C.
  • The unit incorporates an integrated automation and control system with a multi-functional control panel with LCD display.
  • The standard delivery set includes 10 m connection cable for connection to the remote control panel.
  • The unit has the freezing protection function to prevent the heat exchanger freezing by means of actuating the bypass damper and controlling water heater.
  • As the temperature sensor warns of the freezing danger, the bypass air damper is opened and the intake air is directed through the air duct beside the heat exchanger.
  • As the heat exchanger is warmed the supply air temperature rises up to the set level while passing through the heater.
  • Meanwhile the warm extract air warms up the heat exchanger. After the freezing danger is no longer imminent, the bypass damper shuts the bypass duct and the unit reverts to the standard operation mode.
  • Control from the control panel: switching on/off, three-speed fan selection, selecting heating/cooling modes (if connected to duct heater); room temperature display;
  • Maintaining supply air temperature set from the control panel by controlling the circulation pump and actuating the heat medium regulating valve; input from the heat medium flow switch (pump alarm);
  • Safe start-up/ shutdown of the fans, warming up of the water heater before start-up; return heat medium temperature control when the fan is off;
  • Freezing protection of the water heating coils by the exhaust temperature sensor and the return heat medium temperature sensor;
  • Control of the compressor and condensing unit of the water cooler by the room temperature sensor (for the models equipped with a duct air cooler);
  • Actuating the external air dampers with a return spring;
  • Unit operation according to week schedule (set at the system setup);
  • Unit shut down at signal from the fire alarm system;
  • Smooth bypass damper control in the bypassing mode to prevent the heat exchanger freezing.
  • The unit is designed for indoor mounting. While mounting the unit provide the correct condensate collection and drainage.
  • Access for the unit servicing and filter cleaning is from the side panels on the left from supply air side. 
  • Access for the unit servicing for VUT 1500 WH and VUT 2000 WH is available from the left or right side panels depends on order code.
  • For attenuation of sound generated by the fans it is recommended to install the duct silencer (refer SR) from inside before the unit.
  • For vibration absorbing it is recommended to install the flexible antivibration connectors (refer VVG) on both sides of the unit.
  • The mixing units USWK are recommended for smooth supply air temperature regulation in the units equipped with water heaters.
  • The mixing unit USWK with three-way heat medium regulating valve and circulation pump provides smooth heating capacity regulation and minimizes the water heater freezing danger.
Parameter VUT 1500 WH-4
Measurement unit
Frequency 50 Hz
Phase 1 ˜
Voltage 230 V
Maximum fan power 2 pcs. x 490 W
Air capacity 1700 m³/h
Total unit current 4.3 A
Fan current 2 pcs. x 2.15 A
Total unit power 980 W
RPM 1100 min-1
Maximum transported air temperature -25..+40 °С
Heat recovery efficiency 77 -
Sound pressure level at 3 m distance 49 dBА
Heating water heating -
Casing material aluzinc -
Insulation 50 mm mineral wool -
Filter: extract G4 -
Filter: supply G4 -
Connected air duct diameter 315 mm
Number of water (glycol) coil rows 4 -
Mass 99 kg
Heat exchanger type cross-flow -
Heat exchanger material polystyrol -
Type supply and exhaust with heat recovery -
Mounting floor mounting -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air flow:
  • Pressure:
Operating point
  • Air flow: --
  • Pressure: ---
Files archieve
Download high quality image "VENTS VUT WH (ErP 2016)" (psd 4.49Mb)
Brochure "VENTS VUT EH/ WH" (pdf 5.67Mb)
User's manual "Control system for air supply and air handling units based on Freemax controllers and AC208A2 sensor control panels" (pdf 7.21Mb)
User's manual "VENTS VUT WH" (pdf 2.8Mb)
Download image "VENTS VUT WH (ErP 2016)" for your website (png 441.04Kb)
Parameter Value Measurement unit
∅D 314 mm
B 842 mm
B1 581 mm
B2 320 mm
B3 520 mm
H 814 mm
H1 947 mm
H2 201 mm
H3 595 mm
L 1345 mm
L1 1388 mm
L2 1445 mm
Technical data
Technical data
Sound-power level Octave-frequency band [Hz]
  Hz Gen 63 125 250 500 1000 2000 4000 8000
LwA to inlet dBA 64 72 67 65 62 65 56 55 48
LwA to outlet dBA 66 76 72 70 61 64 60 63 55
LwA to environment dBA 46 54 54 48 39 39 34 31 27


Designation key
Designation key
Series Rated air flow [m3/h] Heater type Duct connection Row number of the heater Service side (for VUT 1500 WH, VUT 2000 WH)
VENTS VUT 350; 500; 530; 600; 800; 1000; 1500; 2000
W: water
H: horizontal
2: two rows
4: four rows
L: left side
R: right side
Model G4 panel filter Silencers Back valves Air dampers Clamps Summer blocks
VUT 800 WH-2 SF 550x253x48 G4 SR 250 600/900/1200 SRF 250 600/900/1200 KOM 250 KR 250 C 250 VL C4 300/300*2 
VUT 800 WH-4
VUT 1000 WH-2 SF 780x273x48 G4  SR 315 600/900/1200 SRF 315 600/900/1200 KOM 315 KR 315 C 315 VL C4 300/384
VUT 1000 WH-4
VUT 1500 WH-2 SF 550x253x48 G4 SR 250 600/900/1200 SRF 250 600/900/1200 KOM 250 KR 250 C 250 VL C4 300/300*2 
VUT 1500 WH-4
VUT 2000 WH-2 SF 780x273x48 G4  SR 315 600/900/1200 SRF 315 600/900/1200 KOM 315 KR 315 C 315 VL C4 300/384
VUT 2000 WH-4
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