Megawave R290 (MWMHPC-18KW1)

Specifications and technical data

✓ BUS eligibleAir Source (ASHP)DomesticR2907.24–21.9 kW

Manufacturer	Megawave
Model	R290
Model code	MWMHPC-18KW1
Heat pump type	Air Source (ASHP) All Air Source heat pumps →
Application	Domestic All Domestic heat pumps →
Refrigerant	R290 All R290 heat pumps →
Mode	Heating & cooling
Heating capacity	7.24–21.9 kW
Max heating output (low temp)	19.45 kW at A7/W55
COP (heating)	4.4 at A7/W35
Operating range (air)	-25 to 45 °C
Heating flow temperature	up to 75 °C
Power input	7.5 kW
Electrical supply	220-240V (Single Phase)
Cooling capacity	4.55–17.2 kW
Max cooling output (high temp)	17.2 kW at A35/W7
Cooling flow temperature	from 7 °C
Dimensions (H×W×D)	1455 × 1187 × 488 mm
Operational Weight	195 kg
Data added	2026-08-30
Data source	Manufacturer datasheet
Verification	Verified by a human
Boiler Upgrade Scheme	✓ BUS eligible — Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026). Grant also needs an MCS-certified installer and a qualifying system design. Funding guide
PEL certificate no.	MCS HP0341/14
MCS certification	✓ MCS listed
MCS certificate no.	MCS HP0341/14

Free data sheet (PDF) →

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Megawave MWMHPC-18KW1 R290 monobloc air-to-water heat pump, 18 kW nominal. 7.24-21.9 kW at A7/W35 with a published COP of 3.82-5.59 and ErP class A+++. Flow temperature to 75 C, operates from -25 C ambient. Highly DC inverter EVI rotary compressor, single-phase, built-in inverter circulation pump, Wi-Fi and IoT remote monitoring. MCS certified and BUS eligible.

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Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.