Vaillant aroTHERM Plus Air Source Heat Pump
German-engineered premium unit using natural R290 refrigerant, regularly achieving SCOPs around 4.5 in UK field data. A favourite of quality-focused MCS installers; integrates tightly with Vaillant cylinders and controls.
Vaillant aroTHERM Plus air source heat pump price UK (2026)
The Boiler Upgrade Scheme takes £7,500 off in England and Wales (£9,000 for oil and LPG heated homes from 21 July 2026); 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: aroTHERM Plus 7kW from £10,000 pre-grant. Largest: aroTHERM Plus 12kW up to £16,000. Running cost estimated at ~10,000 kWh of heat a year and 25p/kWh electricity. Accurate as at June 2026.
Specifications and pricing are indicative for the UK market as at June 2026. Confirm current models and exact pricing with your MCS-certified installer.
Available Models
aroTHERM Plus 7kW
aroTHERM Plus 12kW
Specifications and pricing are indicative for the UK market as at June 2026. Running costs assume ~10,000 kWh of heat a year at 25p/kWh (Ofgem cap average; changes quarterly). 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
- Field SCOPs among the best in Britain
- Very quiet (42dB at 7kW)
- R290 natural refrigerant, 75C flow available
- Boiler-brand trust and parts network
- Strong controls ecosystem
Cons
- Premium price
- Bulky at higher outputs
- High demand among quality installers can mean waiting
Best for
Efficiency-first buyers who want the best real-world SCOP numbers
Vaillant aroTHERM Plus 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.
Vaillant aroTHERM Plus air source heat pump FAQ
How much is a Vaillant aroTHERM Plus air source heat pump installed in the UK (2026)?
A Vaillant aroTHERM Plus air source heat pump costs £10,000 - £16,000 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 £2,500 - £8,500 out of pocket. The smallest model (aroTHERM Plus 7kW, 7kW heat output) starts around £10,000 pre-grant; the largest (aroTHERM Plus 12kW, 12kW) tops out around £16,000. Combi-to-cylinder conversions and radiator upgrades add to these figures, so always confirm with a written quote.
Is a Vaillant aroTHERM Plus 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. From 21 July 2026 homes heated by oil or LPG can claim £9,000 instead of £7,500. Scotland uses the Home Energy Scotland grant and loan instead; Northern Ireland currently has no equivalent scheme. Grant details accurate as at June 2026.
Is Vaillant aroTHERM Plus a good air source heat pump brand?
German-engineered premium unit using natural R290 refrigerant, regularly achieving SCOPs around 4.5 in UK field data. A favourite of quality-focused MCS installers; integrates tightly with Vaillant cylinders and controls. Vaillant aroTHERM Plus is best suited to efficiency-first buyers who want the best real-world scop numbers.
What is the warranty on a Vaillant aroTHERM Plus heat pump?
Vaillant aroTHERM Plus backs the unit with a 7-year warranty and the compressor with 7 years (indicative; confirm the current terms for your specific model, as accredited-installer schemes often extend them). Workmanship cover for the installation itself comes separately from your installer and should be at least 12 months. Warranty claims generally require professional installation and servicing per the manual, so keep your installation paperwork and MCS certificate.
How efficient is a Vaillant aroTHERM Plus air source heat pump?
The aroTHERM Plus 7kW carries a SCOP (seasonal coefficient of performance) of 4.5, meaning that across a heating season every 1 kWh of electricity in delivers about 4.5 kWh of heat. At Ofgem cap electricity prices (~25p/kWh) and a typical 10,000 kWh annual heat demand, that is an estimated running cost of around £555 a year, against roughly £640 to £810 for a 90%-efficient gas boiler at the 2026 cap gas rates (5.74p rising to 7.33p/kWh on 1 July 2026). Estimates, not quotes; heat-pump time-of-use tariffs can do better.
How long does a Vaillant aroTHERM Plus heat pump last?
Vaillant aroTHERM Plus warrants the unit for 7 years and the compressor for 7, and with an annual service heat pumps are generally expected to run well beyond their warranty period. 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.
Vaillant aroTHERM Plus vs other brands: which should I pick?
Vaillant aroTHERM Plus sits at the premium end of the UK market on pre-grant pricing. It is the efficiency benchmark, with field SCOPs around 4.5 and very quiet operation, favoured by quality-focused MCS installers. See the side-by-side comparisons below for direct head-to-head specs.
Compare with other brands
Where are you?
See indicative costs and local installers for your area