Ochsner GMLW 25 Plus

Specifications and technical data

✓ BUS eligibleAir Source (ASHP)CommercialR407C28.4 kW

Manufacturer	Ochsner
Model	GMLW 25 Plus
Model code	GMLW 25 Plus
Heat pump type	Air Source (ASHP) All Air Source heat pumps →
Application	Commercial All Commercial heat pumps →
Refrigerant	R407C All R407C heat pumps →
Mode	Heating and Cooling
Heating capacity	28.4 kW
Max heating output (low temp)	21.8 kW at A2/W35
COP (heating)	4.6 at A7/W35
SCOP (heating)	4.42 at W35
Operating range (air)	-22 to 40 °C
Heating flow temperature	up to 65 °C
Electrical supply	380-415V (Three Phase)
Cooling capacity	17.9 kW
Max cooling output (high temp)	17.2 kW at A30/W7
EER (cooling)	3.1 at A30/W7
Sound power level	55.5 dB(A) (Sound Power LW(A))
Data added	2026-06-10
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.	BBA 0037/08
MCS certification	✓ MCS listed
MCS certificate no.	BBA 0037/08
MCS listing	View on MCS ↗

Free data sheet (PDF) →

Check noise at a neighbour’s window (MCS 020 a) →

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Ochsner GMLW 25 Plus is a 25.8 kW air source heat pump, providing heating and cooling, using R407C refrigerant.

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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.