Grant Aerona3 Air Source Heat Pump Cost in Scotland
£8,000 to £13,000 installed before the grant, or £500 to £5,500 after a £7,500 grant.
Prices are PumpSwap's indicative figures for Grant Aerona3, not quotes. Home Energy Scotland grant (up to £7,500; £9,000 in rural and island areas).
Grant, which also makes oil boilers, sells the Aerona3 R32 monobloc through its network of Grant-trained G1 installers. The 10 kW model has a certified SCOP of 5.2 at 35°C (MCS) and is rated to work down to -20°C. Off-gas homes in England and Wales replacing oil or LPG heating can get £9,000 off until 31 March 2027.
Grant Aerona3 models and running costs in Scotland
Running costs for 10,000 kWh of heat a year at 26.11p per kWh (Ofgem price cap for Southern Scotland, 1 October to 31 December 2026), at a 45°C design flow temperature: the midpoint of each model's MCS-certified 35°C and 55°C SCOPs.
| Model | Size | SCOP 35°C / 55°C | Installed, before grant | Running cost a year |
|---|---|---|---|---|
| Aerona3 R32 10kW rural 3-4 bed homes replacing oil | 10 kW | 5.2 / 3.47 | £8,500 to £13,000 | £600 |
Pros
- Certified SCOP of 5.2 at 35°C (MCS)
- Compact and light (70 kg)
- 7-year warranty through a G1 installer
- Rated to work down to -20°C
Cons
- High sound power (64 dB(A)), so siting matters
- Maximum flow temperature 60°C, lower than R290 units
- Standard warranty only 12 months unless registered
Best for: Off-gas homes replacing oil or LPG heating, where the £9,000 grant can apply in England and Wales. Warranty: 1 year, up to 7 with conditions.
What Scotland means for your heat pump
- Climate. January averages 5.5°C by day and 0.3°C at night, with 72 days of air frost a year (Met Office 1991-2020; UK 1.2°C and 53 days). The heat loss survey sizes the unit for your local design temperature.
- Gas grid. 20% of homes here are off the gas grid (2024 estimate; Great Britain 16%).
- Grant. Home Energy Scotland grant (up to £7,500; £9,000 in rural and island areas).
Full detail for the region, including planning rules and running costs against gas: air source heat pump cost in Scotland.
Grant Aerona3 prices in towns across Scotland
Other brands in Scotland
Grant Aerona3 in other regions: London, South East England, South West England, East of England, East Midlands, West Midlands, Yorkshire and the Humber, North West England, North East England, Wales, Northern Ireland.
Frequently asked questions
How much does a Grant Aerona3 heat pump cost in Scotland?
£8,000 to £13,000 installed before the grant, or £500 to £5,500 after a £7,500 grant. These are PumpSwap's indicative 2026 prices; your installer's survey sets the real figure.
Can I get the grant on a Grant Aerona3 heat pump in Scotland?
Yes, if your home qualifies: the Home Energy Scotland grant is not tied to a brand. Apply and get approval before the work starts.
What would a Grant Aerona3 heat pump cost to run in Scotland?
Roughly £600 a year for the Aerona3 R32 10kW to deliver 10,000 kWh of heat at 26.11p per kWh (Ofgem price cap for Southern Scotland, 1 October to 31 December 2026). That assumes a 45°C design flow temperature, estimated from its MCS-certified SCOPs of 5.2 at 35°C and 3.47 at 55°C. A lower flow temperature, with bigger radiators or underfloor heating, costs less to run.
Who installs Grant Aerona3 heat pumps in Scotland?
MCS-certified installers across Scotland fit Grant Aerona3. Ask for a heat loss survey and compare two or three quotes on the same basis: unit size, cylinder, radiator changes and warranty.
Heat pump guides for Scotland
Prices, models, efficiency and warranties are indicative and change; confirm with your MCS-certified installer. Climate: Met Office 1991-2020 averages. Energy prices: Ofgem price cap for Southern Scotland, 1 October to 31 December 2026.
Where are you?
See indicative costs and local installers for your area