35kW
50kW
50kW
50kW
100kW
(Available in Q3 2026)
50kW
50kW

AW290

Air source heat pump

The AW290 is a high-performance, high temperature air source heat pump designed to meet heating, cooling, and domestic hot water demands in commercial applications, including apartment buildings, hotels, and schools. The AW290 utilises natural R290 refrigerant for exceptional energy efficiency and a reduced environmental impact.

The AW290 is available in three output options – 35kW, 50kW and 100kW. Up to 16 units can be arranged in cascade to provide capacity up to 1600kW, making them ideal for commercial installations.

5

5 Year
Compressor
Warranty*

2

2 Year Parts
Warranty*

EVI powered

The AW290 units are equipped with EVI technology, enabling high energy efficiency and stable performance. With inverter and EVI technology, the series reaches A+++ energy level and COP is up to 4.4.

R290 refrigerant

The units use R290 refrigerant, a natural and environmentally friendly alternative with a low global warming potential. R290 has been widely adopted in modern heat pump technology due to its excellent thermodynamic properties, delivering high efficiency and reliable performance in air-to-water heat pump applications.

R290 leak sensor

The integrated R290 leak sensor ensures safe operation with high sensitivity and a rapid 5-second response time. Designed for long-term reliability, it requires no calibration or maintenance and has an impressive 15-year lifespan, providing continuous protection and peace of mind.

Refrigerant/water sensor

The AW290 heat pump includes an automatic refrigerant/water separator, ensuring safe operation by preventing any gas from escaping into indoor spaces. This built-in safety feature helps maintain system efficiency and protects occupants from potential exposure.

  • Monobloc design for easy installation

  • Electronic expansion valve control for precise superheat regulation

  • Modbus/BACnet communication

  • Self-adjusting EEV control

  • Inbuilt pump

  • Monobloc design for easy installation

  • Electronic expansion valve control for precise superheat regulation

  • Modbus/BACnet communication

  • Self-adjusting EEV control

  • Inbuilt Grundfos pump

Available in Q3 2026
  • Monobloc design for easy installation

  • Electronic expansion valve control for precise superheat regulation

  • Modbus/BACnet communication

  • Self-adjusting EEV control

  • Inbuilt pump

Downloads

What are the benefits of air source heat pumps?

Air source heat pumps are the versatile, energy-efficient solution for modern heating and cooling systems, delivering exceptional performance and low running costs for commercial properties, apartment blocks, and new build developments.

Exceptional energy
efficiency and cost savings

Air source heat pumps deliver outstanding energy efficiency, significantly reducing heating costs compared to traditional gas boilers or electric heating systems. The Modutherm range achieves COPs up to 5.55 and A+++ energy efficiency ratings, meaning they produce over five times more heat energy than the electricity they consume. The Hybrox series (10-18kW) achieves COP up to 5.55 at A7/W35 conditions, whilst the AW290 range (35-100kW) delivers COP up to 4.4. This exceptional efficiency translates directly to lower energy bills and reduced carbon emissions. Air source heat pumps extract renewable heat from outdoor air, even at temperatures as low as -22°C, making them reliable year-round heating solutions for UK climates. With natural R290 refrigerant that has a Global Warming Potential of just 3 and zero Ozone Depletion Potential, these systems offer both economic and environmental benefits that align with net-zero carbon targets and increasingly stringent building regulations.

Versatile heating and cooling capability

Air source heat pumps provide both heating and cooling from a single system, offering year-round climate control and exceptional value for money. The AW290 range delivers 35-100kW heating capacity and 8.6-85kW cooling capacity, making it ideal for commercial applications including offices, hotels, schools, and leisure facilities. This dual functionality eliminates the need for separate heating and cooling systems, reducing capital costs, installation complexity, and ongoing maintenance requirements. The systems can provide space heating via radiators or underfloor heating, domestic hot water production, and air conditioning during summer months. With flow temperatures up to 78°C at -22°C outdoor temperatures (Hybrox), these heat pumps work effectively with existing radiator systems in retrofit applications, whilst also being optimised for low-temperature systems in new builds. The ability to cascade multiple units allows heating capacities up to 1,600kW, making air source heat pumps suitable for large-scale commercial developments.

Future-proof technology
for decarbonisation

Air source heat pumps are at the forefront of the UK's transition away from fossil fuels, fully aligned with the Future Homes Standard and net-zero carbon commitments. Unlike gas boilers that burn fossil fuels, air source heat pumps extract renewable heat from the outdoor air and use electricity to transfer that heat into buildings. When powered by renewable electricity from solar panels or green tariffs, they offer a truly zero-carbon heating solution. The Modutherm range uses natural R290 refrigerant with a Global Warming Potential (GWP) of just 3, compared to thousands for synthetic refrigerants or the carbon emissions from gas combustion. This makes them one of the most environmentally responsible heating technologies available. With no combustion, no flue requirements, and no gas safety concerns, air source heat pumps eliminate carbon monoxide risks and reduce maintenance demands. As grid electricity continues to decarbonise, the environmental performance of heat pumps improves automatically, providing long-term sustainability without equipment replacement.

Scalable solutions for any project size

Air source heat pumps offer flexible, scalable solutions suitable for single dwellings through to large commercial developments. The Hybrox range (10-18kW) is ideal for individual apartments, houses, and small commercial properties, whilst the AW290 series (35-100kW, expanding to 100kW in Q3 2026) serves larger applications. Multiple units can be cascaded together to achieve heating capacities up to 1,600kW, making them suitable for hotels, apartment blocks, schools, leisure centres, and industrial facilities. This scalability provides design flexibility and allows systems to be sized precisely to match building loads, avoiding the inefficiencies of oversized equipment. Air source heat pumps can be installed as standalone systems or integrated into heat networks, combined with buffer vessels for hydraulic separation, or paired with thermal stores for domestic hot water production. The compact outdoor units require minimal space and can be wall-mounted or floor-standing, making them suitable for properties with limited plant room space or restricted external areas.

Smart controls and system integration

Modutherm's air source heat pumps feature advanced controls and connectivity options that maximise efficiency, comfort, and ease of management. Smart controls optimise operation based on outdoor temperatures, occupancy patterns, and electricity tariffs, reducing running costs whilst maintaining precise indoor comfort levels. The systems integrate seamlessly with building management systems (BMS) via Modbus connectivity, enabling remote monitoring, performance analytics, and fault diagnostics. This connectivity is particularly valuable for commercial properties, housing associations, and multi-dwelling buildings where centralised management reduces operational overhead. Weather compensation adjusts output automatically based on outdoor conditions, eliminating temperature overshoots and improving comfort whilst reducing energy waste. The Modutherm range is compatible with smart home systems, time-of-use electricity tariffs, and demand-side response programmes, allowing operation to be scheduled when grid electricity is cheapest or greenest. When paired with solar PV systems, air source heat pumps can be configured to operate primarily when renewable electricity is being generated, further reducing energy costs and carbon emissions.

Technical Data

35kW
Power supplyV / Ph / H380-415 / 3 / 50
IP ratingIPX4
Performance
Heating capacity at 35°CCapacitykW35.0
Rated inputkW8.33
COP4.20
Heating capacity at 45°CCapacitykW35.0
Rated inputkW10.57
COP3.31
Heating capacity at 55°CCapacitykW35.0
Rated inputkW12.92
COP2.71
Cooling capacity (EWT at 23°C, LWT at 18°C)CapacitykW28.0
Rated inputkW6.65
EER4.21
Cooling capacity (EWT at 12°C, LWT at 7°C)CapacitykW24.0
Rated inputkW8.30
EER2.89
Energy efficiency classA+++
SCOP (Seasonal Coefficient of Performance)LWT at 35°C / 55°C4.59 / 3.83
SEER (Seasonal Energy Efficiency Ratio)LWT at 7°C / 18°C5.49 / 7.17
Operating temperature (min/max)Cooling°C-5 / 43
Heating°C-25 / 35
DHW°C-25 / 43
MOP (Maximum Overcurrent Protection)A30
MCA (Maximum Circuit Amps)A28
GWP (Global Warming Potential)3
Equivalent CO₂Ton0.010
Sound power leveldB(A)70
Sound pressure level at 1 metre (A7/W55)dB(A)53
Components
FanMotor typeBrushless DC motor
Number of fans2
Speedrpm750
RefrigerantTypeR290
Chargekg3
System pressure (min/max)MPa0.3 / 3.5
CompressorMotor typeEVI Scroll DC Compressor
Quantity1
Throttle typeElectronic expansion valve
Water side heat exchangerPlate heat exchanger
Hydraulic
Water pressure dropkPa27
Rated water flowm³/h6.02
Flow/return connections1½" M
Dimensions
Dimensions (LxDxH)Netmm1350 x 520 x 1821
Packagingmm1415 x 535 x 2016
WeightNetkg310
Grosskg331
50kW
Power supplyV / Ph / H380-415 / 3 / 50
IP ratingIPX4
Performance
Heating capacity at 35°CCapacitykW50.0
Rated inputkW11.36
COP4.40
Heating capacity at 45°CCapacitykW50.0
Rated inputkW13.44
COP3.72
Heating capacity at 55°CCapacitykW50.0
Rated inputkW15.53
COP3.22
Cooling capacity (EWT at 23°C, LWT at 18°C)CapacitykW45.0
Rated inputkW10.23
EER4.40
Cooling capacity (EWT at 12°C, LWT at 7°C)CapacitykW42.0
Rated inputkW14.0
EER3.0
Energy efficiency classA+++
SCOP (Seasonal Coefficient of Performance)LWT at 35°C / 55°C4.62 / 3.96
SEER (Seasonal Energy Efficiency Ratio)LWT at 7°C / 18°C4.8 / 6.8
Operating temperature (min/max)Cooling°C-5 / 43
Heating°C-35 / 35
DHW°C-35 / 43
MOP (Maximum Overcurrent Protection)A65
MCA (Maximum Circuit Amps)A55
GWP (Global Warming Potential)3
Equivalent CO₂Ton0.015
Sound power levelPartial loaddB(A)72 / 72
(A7/W35) / (A7/W55) Full loaddB(A)83 / 85
Sound pressure levelPartial loaddB(A)55 / 55
at 1 metre (A7/W35) / (A7/W55) Full loaddB(A)66 / 68
Components
FanMotor typeBrushless DC motor
Number of fans1
Speedrpm700
RefrigerantTypeR290
Chargekg5
System pressure (min/max)MPa0.3 / 3.5
CompressorMotor typeEVI Scroll DC Compressor
Quantity1
Throttle typeElectronic expansion valve
Water side heat exchangerPlate heat exchanger
Hydraulic
Water pressure dropkPa29
Rated water flowm³/h8.60
Flow/return connections1½" M
Dimensions
Dimensions (LxDxH)Netmm1169 x 1049 x 2060
Packagingmm1271 x 1151 x 2260
WeightNetkg445
Grosskg475
100kW
Power supplyV / Ph / H380-415 / 3 / 50
IP ratingIPX4
Performance
Heating capacity at 35°CCapacitykW100.0
Rated inputkW22.83
COP4.38
Heating capacity at 45°CCapacitykW100.0
Rated inputkW27.03
COP3.70
Heating capacity at 55°CCapacitykW100.0
Rated inputkW31.25
COP3.20
Cooling capacity (EWT at 23°C, LWT at 18°C)CapacitykW85.0
Rated inputkW19.32
EER4.40
Cooling capacity (EWT at 12°C, LWT at 7°C)CapacitykW82.0
Rated inputkW27.33
EER3.0
Energy efficiency classA+++
SCOP (Seasonal Coefficient of Performance)LWT at 35°C / 55°C4.60 / 3.92
SEER (Seasonal Energy Efficiency Ratio)LWT at 7°C / 18°C4.7 / 6.7
Operating temperature (min/max)Cooling°C-5 / 43
Heating°C-35 / 35
DHW°C-35 / 43
GWP (Global Warming Potential)3
Sound power leveldB80
Components
FanMotor typeBrushless DC motor
Number of fans2
RefrigerantTypeR290
CompressorMotor typeEVI Scroll DC Compressor
Quantity2
Hydraulic
Flow/return connectionsDN65
Dimensions
Dimensions (LxDxH)Netmm2450 x 1220 x 2200
Packagingmm2560 x 1330 x 2300
WeightNetkg800
Grosskg850