GRH 40÷450

Heat Recovery Unit from 380 to 4.500 m³/h with VERY HIGH EFFICIENCY exchanger

_icon_novair_erplot62018.png _icon_novair_plate_exchanger.png _icon_novair_90xcento.png _icon_novair_ec_plug_fan.png

A ventilation unit designed and manufactured for non-residential applications allows combining the need for air renewal with maximum energy saving. Equipped with a counterflow heat recovery unit in aluminium plates, it specifically meets the requirements of EU Regulation no. 1253/2014. By nature, they are units that generally tend to integrate with traditional heating/air conditioning systems, even if, equipped with the appropriate accessories, they can be used completely on their own. The series, both in horizontal and vertical set-up, is divided into six sizes, for air flow rates ranging from 380 to 4500 m³/h.


  • GRH/HA - Horizontal installation A type configuration
  • GRH/HB - Horizontal installation B type configuration
  • GRH/VC - Vertical installation C type configuration
  • GRH/VD - Vertical installation D type configuration


  • The structure is made with 25 mm thick insulated panels in galvanised sheet metal on the inside and RAL 9002 pre-painted finish on the outside, internally insulated with non-flammable mineral wool thermal-acoustic insulation.
  • Compact filters with synthetic media (external layer) and glass fibre media (internal layer) and galvanised steel frame, in the efficiency class ePM10 50% on the ambient air intake and ePM1 50% on the outdoor air intake, removable on the bottom. Each filtering station is already equipped with a control pressure switch wired on board and suitable to house two filters in sequence.
  • EC Inverter Plug-Fans.
  • The high-efficiency heat recovery unit is of the air-to-air counterflow flow type with aluminium exchange plates with an integrated by-pass system for free-cooling operation.
  • Electrical board built-in in the unit with electronic adjustment and remote user interface for complete control of all features: ventilation and temperature control, filter status monitoring, weekly programming, defrost and antifreeze management, fire alarm management and Modbus interface.

Factory fitted accessories

  • FTF9 Plate filters efficiency F9 ePM1 85% - Second stage
  • AT Constant air flow regulation control
  • EHP Supplementary electrical heater-PRE
  • EHR Supplementary electrical heater-POST

Loose accessories

  • CRT Touch screen remote control panel
  • PMM Multidirectional plenum
  • BCF Nozzle for circular ducts - Frontal
  • BCL Nozzle for circular ducts - Lateral
  • SK1 Adjustment damper - Frontal
  • SK2 Adjustment damper - Lateral
  • SM Servo-motor for damper
  • GA1 Anti-vibrating joint - Frontal
  • GA2 Anti-vibrating joint - Lateral
  • WFH Water cooling / heating section - Horizontal
  • WFV Water cooling / heating section - Vertical
  • WXH Direct expansion cooling / heating section - Horizontal
  • WXV Direct expansion cooling / heating section - Vertical
  • SQO Air quality sensor (CO2)
  • KSA Sanitization module with UVC plasma and antivirus
  • V33 3-way modulating valve with servo control
  • TTH Roof covering - Horizontal
  • TTV Roof covering - Vertical
  • TTA Roof covering for WFH and WXH - Horizontal
  • TTB Roof covering for WFV and WXV - Vertical
Air flowNominalm³/h38072011301710246033004500
Sound pressureSound pressure (1)dB(A)54535159596064
Electrical characteristicsPower supplyV/Ph/Hz230/1/50-60230/1/50-60230/1/50-60230/1/50-60400/3+N/50-60400/3+N/50-60400/3+N/50-60
Motors nominal powerkW0,340,340,730,931,651,923,05
Max. running currentA2,82,96,06,03,43,57,6
Motors nominal powerkW0,340,340,730,931,651,923,05
Heat RecoveryRecovery efficiency (2)%92,191,791,791,590,790,891,3
Recovery capacity (2)kW3,56,610,515,622,329,935,2
Recovery efficiency (3)%83,882,882,482,081,481,582,9
Total cooling capacity (4)kW2,464,476,6510,6216,1420,6826,29
Sensible cooling capacity (4)kW1,352,413,665,848,7211,3714,20
Heating capacity (5)kW3,305,869,0812,9720,8327,5033,36
Water flow (4)l/s43275611521836277235644500
Water connections" G3/43/43/43/43/411
Electrical heaterPower supplyV/Ph/Hz230/1/50230/1/50230/1/50230/1/51400/3+N/50400/3+N/50400/3+N/50
WeightsTransport weightkg99120199263326405549
Operating weightkg86106181237297367520




  • 1 Lato circuito aria esterna/immissione alla protata aria nominale e ad 1 m dall'unità.
  • 2 Under humid conditions at nominal flow rate: outdoor air at - 10 °C 90% RH, ambient air at 20 °C 60% RH.
  • 3 In condizioni secche alla portata nominale: aria esterna a 5° C, aria ambiente a 25° C.
  • 4 Alla portata nominale: aria in ingresso a 28° C 60% UR, acqua in/out a 7°/12° C.
  • 5 Alla portata nominale: aria in ingresso a 13° C 60% UR, acqua in/out a 45°/40° C.