Compare boilers, heat pumps, and heating systems for UK homes. Running costs, government grants, sizing guides, and advice on switching from gas to renewable heating.
506 articles
The average boiler service cost in the UK for 2026 is £80-£120 for a standard gas combi boiler. Oil and LPG boilers cost £100-£150. The service checks 12 safety and…
A smart thermostat for a heat pump must support OpenTherm or a heat-pump-specific protocol, not just on/off signals. Using a boiler-only thermostat like Hive or Nest Gen 3 can cut…
Worcester Bosch costs £1,000-£1,200 installed, Vaillant £1,200-£1,500, and Viessmann up to £2,700. Energy savings between the three are negligible. Compare warranties and local installer quality to decide.
Hydrogen-ready boilers cost £100-£300 more than standard models, but all new gas boilers sold from 2026 must be hydrogen-ready by law, so you cannot avoid the premium. No domestic hydrogen…
The best combi boiler 2026 for most UK homes costs between £800 and £1,400. Mid-range models like the Worcester Bosch Greenstar i or Vaillant ecoTEC plus achieve 92-94% efficiency and…
Combi boilers cost £1,500-£3,000 to install and heat water instantly for one tap, ideal for small homes. System boilers cost £2,000-£4,000 and can run multiple showers, better for larger households.…
Air-to-air heat pumps cost £2,500-£4,500 installed before the BUS grant, which does not apply to these systems. Running costs are around 7.0p/kWh, slightly higher than a gas boiler at 6.0p/kWh,…
MCS certification is required to claim the £7,500 Boiler Upgrade Scheme grant. It covers the installer’s competence and system design, not the heat pump brand. Without it, you lose the…
Yes, annual heat pump servicing costs £120-£180 in 2026 and is required to keep your manufacturer warranty valid. Without it, a compressor failure could cost £800-£2,500 to repair. Compare service…
Daikin, Mitsubishi Electric and Vaillant are the best heat pump brands UK 2026, based on Which? reliability surveys and Energy Saving Trust field trials. Expect installed costs of £7,000 to…
Heat pumps for old houses in the UK cost £4,500-£6,500 to install in 2026, with annual running costs of £1,200-£1,600 for a 150m² pre-1950 home. Savings depend on your insulation…
COP is a lab test under fixed conditions; SCOP is the real-world annual average. In UK homes, a typical COP of 4.0 drops to a SCOP of around 3.2, which…
A heat pump installation typically takes 2 to 5 days on-site, with the full project from survey to sign-off spanning 4 to 12 weeks. The pre-installation survey and any required…
Hybrid heat pump boiler systems are not eligible for the £7,500 BUS grant in 2026. You must install a standalone heat pump and fully remove the gas boiler to qualify…
Yes, underfloor heating with a heat pump cuts electricity use by 20–30% and boosts efficiency to 360–420% (SCOP 3.6–4.2). This pairing works because both systems operate efficiently at low flow…
Yes, heat pumps work in UK cold weather down to -10°C, below typical winter temperatures. Modern ASHPs lose efficiency gradually, not suddenly, and remain cost-effective for most UK homes. Compare…
Heat pump noise levels range from 40 dB (fridge hum) to 60 dB (normal conversation). The outdoor fan unit is the loudest component. UK planning rules limit sound power to…
Yes, most UK homes need larger radiators for a heat pump. Heat pumps run at 35-55°C, compared to gas boilers at 60-80°C, so existing radiators lose up to 50% output.…
Air source heat pumps cost £2,500–£7,500 installed before the £7,500 grant, while ground source costs £14,000–£19,000. Both qualify for the same BUS grant in 2026, but GSHP offers higher efficiency…
Most heat pump problems are DIY-fixable. Freezing, low pressure, and error codes cause the majority of callouts. Check the outdoor unit for ice or debris first, then repressurise to 1.0–2.0…
A heat pump for off gas grid homes saves £615 per year on average compared to oil heating, according to Energy Saving Trust 2026 data. Running costs range from £550–£900…
A heat pump saves £2,000-£4,000 over 10 years vs a gas boiler (DESNZ 2026). This assumes a well-insulated home and the £7,500 Boiler Upgrade Scheme grant. Annual running costs are…
A heat pump for small gardens costs £7,000 to £13,000 installed, with a 7-10 year payback. The outdoor unit needs just 1m² of ground space plus 300mm clearance, so it…
A heat pump for a flat typically costs £3,500-£8,000 after the £7,500 Boiler Upgrade Scheme grant. Over 55% of UK flats are technically suitable, but noise limits (42 dB(A)) and…
A new combi boiler costs between 2,000 and 3,500 pounds installed, including flue and controls. System boilers with a hot water cylinder cost 2,500 to 4,500 pounds. Prices vary by brand, output size, and complexity of the installation.
At 2026 energy prices, an air source heat pump with a COP of 3 costs roughly the same as a gas boiler to run. With electricity at 24.5p per kWh and gas at 7.2p per kWh, the heat pump produces heat at about 8.2p per kWh compared to gas at around 8p per kWh including boiler efficiency. The 7,500 pound BUS grant makes the overall economics favourable.
Yes, but older houses often need some preparation. The key requirements are adequate insulation, possibly larger radiators or underfloor heating for lower flow temperatures, and sufficient outdoor space for the external unit. A professional heat loss survey will determine what upgrades are needed.
The BUS provides 7,500 pounds towards installing an air source or ground source heat pump. Your home must have an EPC, be replacing a fossil fuel heating system, and use an MCS-certified installer. The property must be in England or Wales and you cannot have previously claimed a renewable heat incentive.
Air source heat pumps typically last 15 to 20 years, while ground source heat pumps can last 20 to 25 years. A well-maintained gas boiler lasts 10 to 15 years. Heat pumps have fewer moving parts and require less maintenance.
Air source heat pumps cost £800-£1,100 per year to run in a typical UK three-bedroom semi, comparable to a new gas boiler. With a £7,500 government grant available through the…
A hydrogen-ready boiler is a gas boiler engineered to switch to 100% hydrogen in the future with minor component changes, and in 2026 it costs roughly £100 to £300 more…
For most UK homeowners, an air source heat pump is the more practical and affordable choice, costing roughly £8,000–£15,000 installed before the £7,500 Boiler Upgrade Scheme grant reduces the net…
The Boiler Upgrade Scheme is a UK Government grant programme administered by Ofgem that provides upfront discounts of up to £7,500 off the cost of installing a low-carbon heating system…
The best smart thermostats available in the UK can save a typical household between £75 and £150 per year on heating bills, according to Energy Saving Trust guidance, with top-rated…
A new boiler installed in the UK in 2026 costs between £1,500 and £4,500 all in, covering the boiler unit, labour, and standard fitting materials. A simple like-for-like combi boiler…
