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Heating and Cooling / Facade Heating & Cooling Products

Ventilation unit (supply return air) for mixing ventilation LG-ZA-M-SB, for vertical parapet mounting

Ventilation unit for integration into the parapet of a facade, with direct outdoor and exhaust air connections; ductless ventilation. Housing made of galvanized sheet metal including: air filters, heat recovery system, heating and cooling coils, air dampers, supply and return air fans; 2-row adjustable induction outlet for thermal facade screening and direct workplace ventilation; DDC controller and control valve.


  • For cooling, heating, and fresh air supply from the window parapet
  • Outdoor air intake and exhaust air extraction directly through the facade, i.e. ductless ventilation
  • F5 filter class (F7 optional)
  • Various modes of operation to meet different user requirements:
    • Cooling
    • Heating
    • Operation with heat recovery
    • Operation with recirculated air
    • Operation with outdoor air
    • 3-speed fan Operation

  • Hygiene tested to German guidelines VDI 6022, sheets 1 and 3, and VDI 3803, to EN 13779 and to DIN 1946-4
  • Easy to service and clean (no dis-assembly needed)
  • Complete condensate drain
  • Controller with high flexibility for individual user requirements
  • Low sound power level
  • Suitable for new or refurbished buildings


Supply/Return air volume flow rate:

max. 53 l/s [190 m³/h] respectively

Amount of heat recovered:

approx. 50%

Total cooling output:

720 W


- for cooling down 33% outdoor air 200 W

- for room cooling when tR = 26 °C 520 W

Cold water temperature:

14 / 17 °C

Total heating output:

1 200 W


- for heating up 33% outdoor air 280 W

- for room heating when tR = 22 °C 920 W

Hot water temperature:

50 / 40 °C

Operating voltage:

230 V / 50 Hz


1 000 mm


650 mm


297 mm

To find out how you could benefit from our product, talk to an expert today on 0203 912 6222 or fill out the form below