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  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Additional characteristics
  • Designation key
  • Accessories
  • The PA unit is a ready to use ventilation unit for air filtration, warming and supply to the room.

  • Steel casing covered with aluzinc coating internally filled with 50 mm heat- and sound-insulating layer made of mineral wool.

  • Integrated panel G4 filter ensures sufficient supply air purification (optionally F7).

  • The PA units are equipped with electric (PA…E model) or water (PA…W model) heater. 

  • Depending on the required heating capacity the water heaters are available in two-, three- or four-row modifications.

  • The water heaters are designed for max. operating pressure 1.0 MPa (10 bar) and max. operating temperature 95 °C of the heat medium.

  • The unit is equipped with a direct-driven centrifugal fan with backward curved blades and external rotor motor.

  • The fan configuration ensures the best operating characteristics: high air capacity and efficiency combined with low noise level.

  • The unit is designed for indoor installation either on the floor, on the wall or under the ceiling by means of a seat angle with inserted vibration-damping element or attached to a wall with brackets.

  • The unit can be mounted either in service spaces or in main premises above the suspended ceiling, in the pocket or the unit can be placed directly in the room.

  • All the electrical connections are performed through the terminal box placed in the connection box.

  • PA supply units are supplied with the fastening brackets to facilitate mounting.

  • The unit can be mounted in any position but the vertical one with vertical air downstream because the electrical heating elements are not allowed under the fan.
  • Access for the unit maintenance and filter cleaning shall be provided.

  • The unit design enables to lead the water heater pipes to the right or to the left while mounting. The pipes are directed on the right on supply air side by default.

  • The supply units are available in two modifications:
    • No control system. Customer-defined and customer-selected automation system.
    • Integrated control and automation system for speed (air capacity) control and setting supply air temperature. The unit may be remotely controlled from the external control panel fixed on wire.
PA…W control and protection functions
  • control from the control panel: switching the unit on/off, fan speed selection (low/medium/high speed), selecting heating/cooling modes (if connected to duct cooler);
  • 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);
  • filter clogging degree with differential pressure sensor;
  • actuating the external air damper with a return spring;
  • unit shut down at signal from the fire alarm system.
  • 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.
  • To disable uncontrollable air flow when the fan is off it is recommended to install the air damper with servo actuator from outside at the unit inlet.
  • To protect the water heater against cold intake air in case of power failure for the units with water heaters it is recommended to install the air damper with a return spring.
  • For attenuation of sound generated by the fan it is recommended to install the duct silencer (refer SR).
  • For vibration absorbing it is recommended to install the flexible anti-vibration connectors (refer VVG) on both sides of the unit.
Parameter PA 02 W4
Measurement unit
Phase 3 ˜
Voltage 400 V
Fan current 1.05 A
Maximum fan power 620 W
Frequency 50 Hz
Air capacity 2350 m³/h
Maximum air capacity 2350 m³/h
Total unit power 620 W
Total unit current 1.05 A
RPM 2690 min-1
Filter G4 (F7) pocket type* -
Transported air temperature -25 ... +45 °С
Sound pressure level at 3 m distance 54 dBА
Heating water heating -
Casing material aluzinc -
Insulation 50 mm mineral wool -
Width 500 mm
Connected air duct diameter 500х300 mm
Number of water (glycol) coil rows 4 -
Mass 63 kg
Height 300 mm
Number of rows in water heater Number of rows in water heater 2-двухрядный -
Duct for rectangular air ducts -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air flow:
  • Pressure:
Operating point
  • Air flow: --
  • Pressure: ---
Files archieve
Select document type
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  • Technical documentation
"VENTS PA...E, PA...W" product description 02-2018 (pdf 5.07Mb)
Download high quality image "VENTS PA...W (ErP 2016, 2018)" (psd 4.09Mb)
"VENTS PA...W. Unit without automation block" user's manual 09-2019 (V43EN-03) (pdf 1.44Mb)
"Control and automation block for VENTS PA...W" user's manual 06-2018 (V43(automatic)EN-06) (pdf 1.61Mb)
"Control system for air supply and air handling units based on Freemax controllers and AC208A2 sensor control panels" user's manual 12-2019 (V99EN-03) (pdf 7.21Mb)
Download image "VENTS PA...W (ErP 2016, 2018)" for your website (png 367.25Kb)
Parameter Value Measurement unit
B 500 mm
B3 646 mm
B1 520 mm
L 1250 mm
H 300 mm
L1 1212 mm
H2 447 mm
B2 689 mm
H1 320 mm
Additional characteristics
Additional characteristics
Sound-power level Gen Octave-frequency band [Hz]
63 125 250 500 1000 2000 4000 8000
LWA to inlet dBA 69 52 69 65 60 58 49 55 49
LWA to outlet dBA 85 57 71 82 77 75 74 73 69
LWA to environment dBA 55 37 58 61 53 51 52 55 52
Designation key
Designation key
Series Unit standard size Heater type Row number of the heater  Integrated control system
VENTS PA  01; 02; 03; 04 W: water 2: two rows;
3: three rows;
4: four rows
_: no control system
LCD: integrated automation with A16 (PA..E) or A13 (PA..W) control panel
Type G4 replaceable filter F F7 replaceable filter Filter type
PA 01 W2 SFK 474x269x27 G4 SFK 474x269x27 F7 pocket filter
PA 01 W4
PA 02 W2 SFK 538x342x27 G4 SFK 474x269x27 F7 pocket filter
PA 02 W4
PA 03 W2 SFK 637x395x27 G4 SFK 637x395x27 F7 pocket filter
PA 03 W4
PA 04 W2 SFK 737x441x27 G4 SFK 737x441x27 F7 pocket filter
PA 04 W3
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