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
An air source heat pump costs £3,500–£7,500 after the £7,500 BUS grant in 2026, compared to £2,500–£4,000 for a gas boiler. Running costs are roughly £175 higher per year, so…
Heat pumps last 15-20 years in the UK, compared to 10-15 years for gas boilers. Ground-source heat pumps can reach 20-25 years. Annual servicing and proper installation are key to…
A gas boiler emits 2.2 kg CO₂ per hour, while a heat pump emits 0.6 kg per hour, a 73% reduction. The 2026 UK grid carbon intensity of 120 gCO₂/kWh…
Heat pump grants UK 2026 offer £7,500 off installation through the Boiler Upgrade Scheme for homeowners in England and Wales. The grant is deducted from your installer's quote, so you…
Heat pump installation cost UK 2026 is £7,000–£13,000 for air-source, with a median of £10,500 (DESNZ). The £7,500 Boiler Upgrade Scheme grant reduces net cost to £2,500–£5,500. Ground-source systems cost…
The average boiler replacement cost in the UK in 2026 is £2,500-£4,000 installed for a gas combi boiler in a standard three-bed semi. Your final price depends on boiler type,…
Gas boilers cost £1,200-£2,800 to install; air-source heat pumps cost £7,000-£14,000. Annual running costs are £600-£1,000 for gas boilers and £900-£1,400 for heat pumps in 2026. Heat pumps cut CO₂…
In 2026, a heat pump costs £840 per year vs £800 for a gas boiler, just £40 more for a typical 3-bed semi. With a high-SCOP unit of 4.0, the…
Heat pumps need radiators 2-3 times larger than gas boilers, costing £150-£300 each to upgrade. The lower flow temperature (35-55°C) means less heat output per radiator, so you need more…
Yes, a heat pump can replace a gas or oil boiler in most UK homes if your heat loss at -3°C is under 8-10 kW. The upfront cost is £7,000-£13,000…
A heat pump can work in a Victorian terrace, but costs typically range from £7,000–£14,000 after the £7,500 Boiler Upgrade Scheme grant. The key is upgrading insulation first, solid walls,…
Heat pumps save £200-£400 a year on heating in new builds vs gas boilers, but cost £7,000-£13,000 more upfront. From 2026, gas boilers are banned in new builds under the…
Heat pump noise levels are 40–60 dB for air-source and 30–45 dB for ground-source models. The UK legal limit is 42 dB at the neighbour boundary under permitted development rights.…
A hybrid heat pump system costs £8,000–£14,000 installed (2026). After the £7,500 BUS grant, net cost is £500–£6,500. It cuts annual bills by £200–£600 by using the heat pump for…
A heat pump moves heat from air, ground or water into your home using electricity, delivering 2.5–3 kWh of heat per 1 kWh used. Here is how it works.
Repressurising a boiler costs £0 DIY or £80–£120 for a professional in 2026. Find out when you can do it yourself and when to call a Gas Safe engineer.
Most UK boiler warranties require a yearly Gas Safe service to stay valid. Miss one and you risk voiding 5–10 years of cover, leaving repair bills of £300–600.
Set your UK combi boiler to 60°C for radiators and 50°C for hot water this winter. The right settings can save up to £60 a year on a 12,000 kWh…
A UK gas boiler lasts 12 years on average, but annual servicing can add 3–5 years. Find out what affects your boiler's lifespan in 2026.
A sealed heating system should hold 1.0–1.5 bar cold. Losing 0.2 bar overnight signals a leak, here's how to find and fix it before your boiler locks out.
Around 1 in 20 UK homes has a heat pump as of 2026, with 550,000 units installed. See how rates vary by region and property type.
Heat pumps achieve 300–400% efficiency vs a gas boiler's 90%. Learn how the refrigeration cycle works, with clear diagrams of all four key components.
Heat pumps extract heat from air, ground or water to deliver 3–4 kWh of warmth per 1 kWh of electricity, cutting carbon versus a gas boiler.
Heat pumps work by moving heat from outside air or ground into your hot water cylinder, using a reversed fridge cycle. They are 3-4 times more efficient than gas boilers,…
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…
