Head to head
Grant Aerona3 R32 17kW vs Vaillant ecoTEC Pro 24kW combi
The Grant Aerona3 R32 17kW comes with 5 years more warranty.
Last reviewed 13 September 2026
Key differences
- Warranty: the Grant Aerona3 R32 17kW comes with 5 years more warranty.
Specifications side by side
| Grant Aerona3 R32 17kW | Vaillant ecoTEC Pro 24kW combi | |
|---|---|---|
| Dimensions | 1418 x 1024 x 403 mm (H x W x D) | 720 x 440 x 338 mm |
| Weight | 118 kg | 38 kg |
| Warranty | 7 years when installed by a Grant G1 accredited installer | 2 years standard, 7 years with Vaillant Advance registration |
| Heat output | 17 kW | - |
| SCOP | 4.54 (35C flow), 3.57 (55C flow) | - |
| Refrigerant | R32 | - |
| Hot water output | - | 23.4 kW |
| Central heating output | - | 24.8 kW |
| ErP class | - | A |
| Seasonal efficiency | - | 93% |
| Hot water flow rate | - | 9.6 litres per minute |
Sources: Grant Aerona3 R32 17kW, Vaillant ecoTEC Pro 24kW combi. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Aerona3 R32 17kW if...
- you want one that comes with 5 years more warranty
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 ecoTEC Pro 24kW combi if...
A gas combi boiler with 23.4 kW of hot water output, sized for a flat or small house with one bathroom. It delivers about 9.6 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 2 years standard, 7 years with Vaillant Advance registration. Seasonal efficiency is 93%.
Full ecoTEC Pro 24kW combi specifications →Common questions
What is the difference between the Grant Aerona3 R32 17kW and the Vaillant ecoTEC Pro 24kW combi?
The Grant Aerona3 R32 17kW comes with 5 years more warranty. The Grant Aerona3 R32 17kW is a r32 inverter driven air source heat pump, 17 kW heat output; the Vaillant ecoTEC Pro 24kW combi is a gas combi boiler, 23.4 kW hot water output.
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