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
Vaillant aroTHERM heat pumps cut household heating emissions by roughly 60% versus a gas boiler A Vaillant aroTHERM heat pump replaces a gas boiler with an air-source heat pump. It extracts heat from the outside air and uses it to heat your home and hot water. This technology reduces carbon emissions significantly compared to gas […]
Daikin Altherma heat pump review 2026 The most important thing to know first The Daikin Altherma series is one of the most widely installed air-source heat pump ranges in the UK, with models covering 4 kW to 16 kW outputs for homes with varying heat demands. The key decision factor is that the Daikin Altherma […]
Vaillant boilers cost roughly £300 more than a comparable Glow-worm model on the UK market If you are choosing between a Glow-worm and a Vaillant boiler, the upfront price difference is one of the first things you will notice. A typical 30kW gas combi boiler from Glow-worm costs between £2,200 and £2,700 fully installed, while […]
Which Baxi boiler models are available in 2026 Baxi offers four main gas boiler ranges for homeowners in 2026: the 400, 600, 800, and 900 series, plus the Platinum combi and system models. The 400 series is the entry-level option with a 7-year warranty. The 900 series is the top-end condensing combi with a 10-year […]
The Ideal Logic is the UK’s best-selling boiler range by volume, here is the 2026 data As of 2026, the Ideal Logic range holds the largest market share of any single domestic boiler family in the UK. The latest Heating and Hotwater Industry Council (HHIC) market-share report confirms this position (HHIC, 2026). The Logic is […]
Viessmann holds a 14% share of the UK boiler market, according to 2025 MCS and industry data collated by the Heating & Hotwater Industry Council (HHIC) Viessmann is the second-largest boiler brand sold in the UK by volume, behind Worcester Bosch, according to HHIC market-share data (HHIC, 2026). The brand occupies a premium price bracket, […]
A new Vaillant boiler costs between £1,800 and £3,500 fully installed, depending on the model and property size. The price you pay for a new Vaillant boiler depends on the model you choose and the size of your home. Based on typical quotes from Which? Trusted Trader survey data, a fully installed Vaillant boiler ranges […]
Worcester Bosch remains the most-installed boiler brand in UK homes, backed by the longest manufacturer warranty Worcester Bosch held approximately 27% of the UK boiler market in 2025, according to the Heating and Hotwater Industry Council (HHIC) market data (HHIC, 2025). The standard warranty is 10 years on the heat exchanger for the Greenstar range, […]
The average detached house in the UK uses nearly 50% more gas than a semi-detached home Detached houses are the most energy-intensive dwelling type in the UK. The Department for Energy Security and Net Zero (DESNZ) reports that an average detached home consumes around 17,000 kWh of gas per year, compared to 11,500 kWh for […]
Replacing an oil boiler with a heat pump cuts annual heating costs by up to £1,100 in a typical Northern Ireland home If you heat your home with oil in Northern Ireland, your annual fuel bills have been volatile and high. Switching to a heat pump offers a clear financial and environmental upgrade. Quick Answer […]
Heat pumps in Scotland work reliably because modern models are designed for the UK’s coldest winter design temperatures, not mild European climates. The persistent worry that heat pumps cannot handle a Scottish winter is based on outdated assumptions. The UK’s standard for heat pump sizing uses a winter design temperature of -3°C to -5°C depending […]
The most important thing you need to know about smart thermostats for heat pumps If you have a heat pump, the wrong thermostat can quietly waste hundreds of pounds a year. Heat pumps need gradual modulation, not the on/off switching that gas boiler thermostats use. Quick Answer A heat pump-specific smart thermostat costs £200-£600 installed […]
Balancing costs nothing but can cut your heating bill by up to 15% An unbalanced heating system forces your boiler to work harder than it needs to, pushing up your gas bill. DESNZ data from 2026 shows that an unbalanced heating system can increase gas usage by the equivalent of 150–300 kWh per year for […]
A magnetic filter costs £80–£150 installed; a cyclonic filter costs £100–£200 installed When your boiler starts making strange noises or your radiators have cold patches, sludge is often the cause. Both magnetic and cyclonic filters are built to remove this debris from your heating system. Quick Answer Magnetic filters cost £80–£150 installed; cyclonic filters cost […]
How the Boiler Upgrade Scheme defines “renewable heating” for UK homeowners in 2026 If you are looking at renewable heating in the UK in 2026, the government definition comes down to one thing: the Boiler Upgrade Scheme (BUS). This grant covers air source heat pumps, ground source heat pumps, and biomass boilers, but only in […]
Combi vs heat-only running cost 2026 The question of whether a combi or heat-only boiler costs less to run is one of the most common in UK home heating. Homeowners replacing a boiler often assume the system they already have is the cheapest option, but the numbers tell a different story. Quick Answer A combi […]
The heat exchanger is the part of your boiler that transfers heat from the gas burner to your central heating water The heat exchanger is a sealed metal component inside your boiler where the hot gases from the burner pass over water-filled pipes or channels. Its job is to transfer the maximum amount of heat […]
Low-temperature heating requires larger pipework than old high-temperature systems If you are replacing a gas or oil boiler with a heat pump, the pipework in your home may not be suitable. Low-temperature heating systems operate at flow temperatures of 50–55°C or below, whereas traditional boilers typically run at 70–80°C (Energy Saving Trust, 2026). To deliver […]
Hydrogen blending in the UK gas grid remains a limited pilot, not a national switch, and in 2026, it adds roughly £30–£50 a year to a typical household gas bill, according to DESNZ impact assessments. Should you be paying attention to hydrogen blending in the UK in 2026? The short answer is: only if you […]
Replacing an LPG boiler in 2026 is a significant financial decision, with a standard installation costing between £6,000 and £9,000. However, the most cost-effective alternative for many homes is an air-source heat pump, which can cost as little as £3,000 to £5,500 after the £7,500 Boiler Upgrade Scheme grant. Quick Answer LPG boiler alternatives start […]
Off-grid heating costs roughly twice as much to run as mains gas in 2026 If your home is not connected to the mains gas network, your heating bills are likely to be substantially higher than those of a household that is. This is a direct result of the fuel types available to off-grid homes and […]
An air-to-water heat pump costs roughly twice as much as a gas boiler but can cut heating bills by 30–40% in a well-insulated home. The typical installed cost for an air-to-water heat pump system in the UK is £10,000–£14,000, compared to £2,500–£4,000 for a new gas boiler (Energy Saving Trust, 2026). Annual savings on heating […]
A wood burning stove in 2026 costs roughly £1,500 more to install than a gas boiler, but the real financial test is the payback period against your heating bill. The total installed cost of a typical 5 kW Ecodesign-ready wood burning stove in 2026 is £2,500 to £4,000, including a flue liner and hearth, compared […]
Choosing between electric and water underfloor heating is one of the more consequential decisions you will make when renovating or building a UK home. The two systems look similar underfoot but differ fundamentally in how they generate heat, how quickly they respond, and what they cost to run. Quick Answer Water underfloor heating costs roughly […]
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.
How Heat Pumps and Gas Boilers Compare on Running Costs An air source heat pump (ASHP) produces 3-4 units of heat for every unit of electricity consumed, measured as a Coefficient of Performance (COP). At current UK energy prices with electricity at 24.5p/kWh and gas at 6.4p/kWh, a well-installed heat pump costs approximately the same […]
Replacing a boiler is one of the most significant home improvement decisions a UK homeowner will make, and the emergence of hydrogen-ready boilers has added a genuinely confusing new dimension to what was already a complicated choice. These products are now widely stocked by installers across the country, with major brands including Worcester Bosch, Baxi, […]
Understanding the Difference Between Ground Source and Air Source Heat Pumps Heat pumps are now one of the most discussed home heating technologies in the UK, yet many homeowners remain unsure about the fundamental differences between the two main types. Choosing the wrong system, or installing either type in the wrong home, can result in […]
The Boiler Upgrade Scheme is one of the most significant financial incentives available to UK homeowners wanting to swap their fossil fuel boiler for a low-carbon heating system, offering grants of up to £7,500 towards the cost of installation in 2026. ⚡ Quick Answer The Boiler Upgrade Scheme is a UK Government grant programme administered […]
Heating bills remain one of the biggest household expenses across the United Kingdom, and for most homeowners, the central heating system runs on a programme set years ago that bears little resemblance to how the household actually lives today. A smart thermostat is one of the most accessible, low-cost upgrades available to address this directly, […]
Replacing a boiler is one of the largest single home improvement purchases most UK homeowners will make, and the range of prices quoted by different companies can be genuinely bewildering. Understanding what drives the cost, and what those costs actually cover, puts you in a far stronger position for getting a fair deal. ⚡ Quick […]
