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
MCS 021, the Heat Emitter Guide that UK heat pump installers size radiators from, tells them to multiply each room’s heat loss by 3.1 before choosing a radiator for a system designed to run at 41-45°C. At 51-55°C that multiplier drops to 1.90. Those two numbers decide whether your existing radiators stay on the wall […]
The University of Salford‘s Energy House put a gas combi boiler in an environmental chamber and measured what different heating controls actually saved. The best-performing thermostat cut heating gas by 15% in a winter test. The change that costs nothing, turning the boiler’s flow temperature down to 60°C, cuts about 9% of a household’s total […]
The average lifespan of a UK gas boiler is 10 to 15 years If you own a gas boiler, you will likely need to replace it at some point. The question is when. The most commonly cited figure from the Energy Saving Trust and industry body Heating & Hotwater Industry Council (HHIC) is 10 to […]
Ofgem data shows 73% of UK homes now use a combi boiler, but system boilers are growing for larger properties The choice between a combi and a system boiler is one of the most common decisions UK homeowners face when replacing a heating system. According to Ofgem’s 2026 Domestic Energy Consumption Statistics, 73% of UK […]
How smart heating controls differ from a standard thermostat A standard thermostat is a simple on/off switch. It turns the boiler on when the room temperature drops below your set point and off when it rises above. It does not learn your schedule, adjust to weather, or control individual rooms. Smart heating controls add three […]
Switching from a gas boiler to a heat pump often requires radiators that are 2.5 to 3 times larger in heat output to work efficiently at lower flow temperatures. If you are planning to replace a gas boiler with an air source heat pump, you may be wondering whether your existing radiators will be adequate. […]
Heat pumps work in older UK homes, the key is insulation, not the age of the house If you own a Victorian terrace or a 1930s semi, you may have heard that heat pumps only suit modern, well-insulated homes. That is not correct. A heat pump can work in any home built before 1990, provided […]
The typical air source heat pump installation costs £11,000–£15,000 after the Boiler Upgrade Scheme grant Annual sales of heat pumps in the UK reached 60,000 in 2025, according to the Department for Energy Security and Net Zero (DESNZ) Heat Pump Market Update. This reflects growing consumer interest. The Boiler Upgrade Scheme (BUS) provides a £7,500 […]
Moving a boiler to the garage typically costs between £1,800 and £4,500, but the final bill depends on gas-supply runs and flue routes Moving a gas boiler into a garage is a common home improvement project. The cost depends on the distance from the existing boiler, the flue route, and whether the garage is attached […]
Most existing radiators can work with a heat pump, but only if their total output matches your home’s heat loss at 45°C flow temperature Many homeowners considering a heat pump ask whether their current radiators will be suitable. The short answer is that most existing radiators can work with a heat pump, but only if […]
A magnetic filter costs roughly £150–£300 installed and is recommended by most boiler manufacturers A magnetic filter is a device plumbed into your central heating pipework that captures magnetite, a black iron-oxide sludge that forms as steel radiators and pipes corrode. By trapping these particles before they reach the boiler’s heat exchanger, the filter prevents […]
A 2026 gas boiler costs roughly 50% more per kWh than an electric boiler on standard tariffs The first thing to understand is the raw cost of the fuel itself. Under the January 2026 price cap, Ofgem set the gas unit rate at approximately 7.0p per kWh and the electricity unit rate at approximately 25.0p […]
You may be wondering if you can get help paying for a new boiler. The cost of a new gas boiler installation in the UK in 2026 ranges from £1,500 for a basic combi swap to £4,500 for a system boiler with a hot water cylinder (Energy Saving Trust, 2026). Several government grants can cover […]
The cheapest boiler service appointments are typically booked between April and June UK heating demand follows a clear seasonal pattern, and so does the price of boiler servicing. Data from the Department for Energy Security and Net Zero (DESNZ) shows that the period from April to June is the lowest-demand window for boiler repairs and […]
The average household with a smart thermostat saves roughly £75 a year on heating, and smart radiator valves can add to that figure when used correctly. Many UK homeowners wonder whether smart radiator valves are a worthwhile investment or just another gadget. The core question is straightforward: do they actually reduce your annual gas bill, […]
Topping up boiler pressure once or twice a year is normal, doing it monthly costs around £80–120 extra annually in gas A sealed central heating system should only need a small top-up of water once or twice a year. If you are regularly adding water every month, something is wrong. The national average for a […]
Ofgem data shows 1 in 8 UK homes reported a heating fault in the last 12 months If your radiators are cold but your taps run hot, you are far from alone. Ofgem’s 2026 Consumer Complaints and Fault Data report records that one in eight UK households reported a heating fault in the preceding year […]
Turning your boiler off in summer can save you money, but only if you understand the risks Many homeowners wonder whether switching the boiler off completely during warmer months is a sensible way to cut costs. The answer depends on your boiler type and how you heat your hot water. For most UK homes, turning […]
The typical annual running cost for a gas combi boiler in a three-bedroom semi-detached home is £870 to £1,050 as of early 2025, based on Ofgem's pric
You should have your gas boiler serviced once every 12 months by a Gas Safe registered engineer. This is a legal requirement for landlords, but for ho
For an air source heat pump, the most efficient flow temperature is typically between 35°C and 45°C, while your room thermostat should be set to your
No, modern air source heat pumps are not loud by typical UK household standards. Most units produce between 40 and 60 decibels (dB) at 1 metre, which
A typical air source heat pump in a UK home uses between 10 and 30 kWh of electricity per day during the heating season, according to the Energy Savin
An air source heat pump typically lasts 15 to 20 years, with the outdoor unit often requiring replacement after around 15 years. The UK Energy Saving
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 […]
