

GRH 40÷450
Heat Recovery Unit from 380 to 4.500 m³/h with VERY HIGH EFFICIENCY exchanger




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.
Versions
- 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
Features
- 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.
Accessories
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
Technical data
40 | 70 | 115 | 170 | 250 | 330 | 450 | |||
Air flow | Nominal | m³/h | 380 | 720 | 1130 | 1710 | 2460 | 3300 | 4500 |
Nominal | m³/s | 0,11 | 0,20 | 0,31 | 0,48 | 0,68 | 0,92 | 1,25 | |
Sound pressure | Sound pressure (1) | dB(A) | 54 | 53 | 51 | 59 | 59 | 60 | 64 |
Electrical characteristics | Power supply | V/Ph/Hz | 230/1/50-60 | 230/1/50-60 | 230/1/50-60 | 230/1/50-60 | 400/3+N/50-60 | 400/3+N/50-60 | 400/3+N/50-60 |
Motors nominal power | kW | 0,34 | 0,34 | 0,73 | 0,93 | 1,65 | 1,92 | 3,05 | |
Max. running current | A | 2,8 | 2,9 | 6,0 | 6,0 | 3,4 | 3,5 | 7,6 | |
Motors nominal power | kW | 0,34 | 0,34 | 0,73 | 0,93 | 1,65 | 1,92 | 3,05 | |
Heat Recovery | Recovery efficiency (2) | % | 92,1 | 91,7 | 91,7 | 91,5 | 90,7 | 90,8 | 91,3 |
Recovery capacity (2) | kW | 3,5 | 6,6 | 10,5 | 15,6 | 22,3 | 29,9 | 35,2 | |
Recovery efficiency (3) | % | 83,8 | 82,8 | 82,4 | 82,0 | 81,4 | 81,5 | 82,9 | |
Total cooling capacity (4) | kW | 2,46 | 4,47 | 6,65 | 10,62 | 16,14 | 20,68 | 26,29 | |
Sensible cooling capacity (4) | kW | 1,35 | 2,41 | 3,66 | 5,84 | 8,72 | 11,37 | 14,20 | |
Heating capacity (5) | kW | 3,30 | 5,86 | 9,08 | 12,97 | 20,83 | 27,50 | 33,36 | |
Water flow (4) | l/s | 432 | 756 | 1152 | 1836 | 2772 | 3564 | 4500 | |
Water connections | " G | 3/4 | 3/4 | 3/4 | 3/4 | 3/4 | 1 | 1 | |
Weight | kg | 28 | 31 | 35 | 42 | 52 | 58 | 77 | |
Electrical heater | Power supply | V/Ph/Hz | 230/1/50 | 230/1/50 | 230/1/50 | 230/1/51 | 400/3+N/50 | 400/3+N/50 | 400/3+N/50 |
Weights | Transport weight | kg | 99 | 120 | 199 | 263 | 326 | 405 | 549 |
Operating weight | kg | 86 | 106 | 181 | 237 | 297 | 367 | 520 |
Dimensions
40 | 70 | 115 | 170 | 250 | 330 | 450 | |||
L | HA-HB | mm | 1350 | 1470 | 1850 | 1850 | 2150 | 2150 | 2350 |
VC-VD | mm | 1350 | 1470 | 1850 | 1850 | 2150 | 2150 | 2350 | |
W | HA-HB | mm | 680 | 820 | 1030 | 1460 | 1460 | 1840 | 1900 |
VC-VD | mm | 330 | 370 | 455 | 455 | 590 | 590 | 800 | |
H | HA-HB | mm | 330 | 370 | 455 | 455 | 590 | 590 | 800 |
VC-VD | mm | 680 | 820 | 1030 | 1460 | 1460 | 1840 | 1900 |
Notes
- 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.
Documents
- Product guides _novair_catalogo_recuperatori_2022_w_hRhJ2in.pdf
- Technical brochures 07_GRH_nvb_232.pdf
- Installation, use and maintenance manuals Manuale_Regolazione_GRH_nvmr_232_a_b.pdf
- Installation, use and maintenance manuals (IT) Manuale_Installazione_GRH_nvm_232_a.pdf
- Installation, use and maintenance manuals (EN) Installation_Manual_GRH_nvm_232_b.pdf