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AS Thermal R290 Mono Heat Pump
Model code: AMH-4R2
✓ BUS eligible✓ MCS listedAir Source (ASHP)ResidentialHeating & cooling
Heating capacity
4.6 kW
COP
5.25
A7/W35
Max flow temp
75°C
Sound power
54 dB(A)
Refrigerant
R290
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: 011-1W1109_01
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: 011-1W1109_01
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R290 |
| Mode | Heating & cooling |
| Heating performance | |
| Heating capacity | 4.6 kW |
| Max heating output (low temp) | 4.6 kW at A7/W55 |
| COP (heating) | 5.25 at A7/W35 |
| Operating range (air) | -26 to 35 °C |
| Heating flow temperature | 20–75 °C |
| Cooling performance | |
| Cooling capacity | 4.7 kW |
| Max cooling output (high temp) | 4.6 kW at A35/W18 |
| EER (cooling) | 3.6 at A35/W7 |
| Cooling flow temperature | 5–25 °C |
| Electrical, acoustic and physical | |
| Electrical supply | 220-240V (Single Phase) |
| Sound power level | 54 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 880 × 840 × 500 mm |
| Operational Weight | 87 kg |
Test conditions: A = outdoor air °C, W = flow water °C (e.g. A7/W35 = 7°C air, 35°C flow). Compare COP and SCOP only at the same conditions.