Grant Aerona3 Air Source Heat Pump
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 air source heat pump price UK (2026)
The Boiler Upgrade Scheme takes £7,500 off in England and Wales (£9,000 for off-gas homes replacing oil or LPG heating, until 31 March 2027); your MCS-certified installer claims it for you. Scotland uses the Home Energy Scotland grant and loan instead; Northern Ireland has no equivalent. 0% VAT until 31 March 2027 is already reflected. Smallest model: Aerona3 R32 10kW from £8,500 pre-grant. Largest: Aerona3 R32 10kW up to £13,000. Running cost estimated at ~10,000 kWh of heat a year and 26.32p/kWh electricity (October to December 2026 cap). Accurate as at October 2026.
Warranty: 12 months as standard; 2 years if registered within 30 days and serviced annually; 7 years when a Grant-trained G1 installer registers it within 30 days, with annual servicing.SCOP is the MCS-certified seasonal efficiency; sound power is the maker's declared ErP figure, the like-for-like noise measure (what you hear next door depends on distance and siting). Prices are indicative; confirm with your MCS-certified installer.
Available Models
Aerona3 R32 10kW
Specifications from the makers' datasheets and the MCS product directory, checked October 2026; prices are indicative. Running costs: Estimate for 10,000 kWh of heat a year at 26.32p per kWh (Ofgem price cap, October to December 2026), at a 45°C design flow temperature: the midpoint of the certified 35°C and 55°C SCOPs. Post-grant figures illustrate the £7,500 Boiler Upgrade Scheme in England and Wales. Confirm current models and exact pricing with your MCS-certified installer.
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
Grant Aerona3 pricing and grants in your region
The hardware is the same everywhere; the support is not. England and Wales use the £7,500 Boiler Upgrade Scheme, Scotland the Home Energy Scotland grant and loan, and Northern Ireland currently has no grant. Each regional guide covers exactly what applies.
Grant Aerona3 air source heat pump FAQ
How much is a Grant Aerona3 air source heat pump installed in the UK (2026)?
A Grant Aerona3 air source heat pump costs £8,000 - £13,000 fully installed in the UK before any support (indicative, June 2026, with 0% VAT already applied). After the £7,500 Boiler Upgrade Scheme grant in England and Wales, that is illustratively £500 - £5,500 out of pocket. The smallest model (Aerona3 R32 10kW) starts around £8,500 pre-grant; the largest (Aerona3 R32 10kW) tops out around £13,000. Combi-to-cylinder conversions and radiator upgrades add to these figures, so always confirm with a written quote.
Is a Grant Aerona3 heat pump eligible for the £7,500 grant?
Yes. Every air-to-water unit on this page qualifies for the Boiler Upgrade Scheme in England and Wales when it is fitted by an MCS-certified installer, who applies for the grant on your behalf so it comes straight off the quote. Off-gas homes replacing oil or LPG heating can claim £9,000 instead, until 31 March 2027. Scotland uses the Home Energy Scotland grant and loan instead; Northern Ireland currently has no equivalent scheme. Grant details accurate as at October 2026.
Is Grant Aerona3 a good air source heat pump brand?
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 is best suited to off-gas homes replacing oil or lpg heating, where the £9,000 grant can apply in england and wales.
What is the warranty on a Grant Aerona3 heat pump?
12 months as standard; 2 years if registered within 30 days and serviced annually; 7 years when a Grant-trained G1 installer registers it within 30 days, with annual servicing. Workmanship cover for the installation itself comes separately from your installer. Most extended terms depend on registering the product and annual servicing, so keep your installation paperwork and MCS certificate.
How efficient is a Grant Aerona3 air source heat pump?
The Aerona3 R32 10kW has an MCS-certified SCOP (seasonal coefficient of performance) of 5.2 at 35°C flow and 3.47 at 55°C, so over a heating season each 1 kWh of electricity delivers about 3.47 to 5.2 kWh of heat, depending on how hot your system runs. At a 45°C design flow and the Ofgem cap rate (26.32p/kWh), 10,000 kWh of heat costs an estimated £605 a year, against roughly £890 for a 90%-efficient gas boiler at the current cap gas rate (7.97p/kWh from 1 October 2026). Estimates, not quotes; heat pump time-of-use tariffs can do better.
How long does a Grant Aerona3 heat pump last?
With an annual service, heat pumps are generally expected to run well beyond their warranty period (Grant Aerona3: 1 year, up to 7 with conditions). Longevity depends on correct sizing (the MCS heat-loss survey), sensible siting and regular servicing. Confirm design life and extended-warranty options for your specific model with your MCS-certified installer.
Grant Aerona3 vs other brands: which should I pick?
Grant Aerona3 sits at the value end of the UK market on pre-grant pricing. It suits off-gas homes replacing oil or LPG heating, where the £9,000 grant can apply in England and Wales until 31 March 2027, and has a certified SCOP of 5.2 at 35°C. See the side-by-side comparisons below for direct head-to-head specs.
Grant Aerona3 vs other heat pump brands
Heat pump guides
- Air source heat pump installation cost in the UK
- The best air source heat pumps in the UK, compared
- The £7,500 Boiler Upgrade Scheme, explained
- Air source heat pumps: costs, grants and brands
- Heat pump grants in London
- Heat pump grants in South East England
- Heat pump grants in South West England
- Heat pump grants in East of England
- Heat pump grants in East Midlands
- Heat pump grants in West Midlands
- Heat pump grants in Yorkshire and the Humber
- Heat pump grants in North West England
- Heat pump grants in North East England
- Heat pump grants in Scotland
- Heat pump grants in Wales
- Heat pump grants in Northern Ireland
Other heat pump brands
Where are you?
See indicative costs and local installers for your area