Head to head
Grant Aerona3 R32 17kW vs Vaillant aroTHERM plus 10kW
The Grant Aerona3 R32 17kW is a r32 inverter driven air source heat pump, 17 kw heat output. The Vaillant aroTHERM plus 10kW is a r290 monobloc air source heat pump, 10 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Grant Aerona3 R32 17kW | Vaillant aroTHERM plus 10kW | |
|---|---|---|
| Heat output | 17 kW | 10 kW |
| SCOP | 4.54 (35C flow), 3.57 (55C flow) | up to 5.03 |
| Refrigerant | R32 | R290 (propane), low GWP |
| Dimensions | 1418 x 1024 x 403 mm (H x W x D) | - |
| Weight | 118 kg | - |
| Warranty | 7 years when installed by a Grant G1 accredited installer | - |
| Max flow temperature | - | 75C |
Sources: Grant Aerona3 R32 17kW, Vaillant aroTHERM plus 10kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Aerona3 R32 17kW if...
A 17kW R32 inverter driven heat pump from Grant's Aerona3 range, a common choice for off-gas-grid homes that previously ran an oil boiler. It carries a 7 year warranty through Grant's G1 installer scheme, one of the longer standard terms in this category.
Full Aerona3 R32 17kW specifications →Buy or hire the aroTHERM plus 10kW if...
The larger aroTHERM plus, sized for a bigger house with a higher heat loss. It keeps the same R290 refrigerant and 75C maximum flow temperature as the smaller units in the range, so it can usually work with existing radiators.
Full aroTHERM plus 10kW specifications →Common questions
What is the difference between the Grant Aerona3 R32 17kW and the Vaillant aroTHERM plus 10kW?
The Grant Aerona3 R32 17kW is a r32 inverter driven air source heat pump, 17 kW heat output; the Vaillant aroTHERM plus 10kW is a r290 monobloc air source heat pump, 10 kW heat output.
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