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 radiator oversize factor is the multiplier applied to a room's heat loss to find the radiator output needed. MCS 021 sets it at 3.1x for a heat pump at…
Ranked by cost per percent of gas saved, the free change wins. Turning a condensing combi's flow temperature to 60C cuts about 9% of total gas use, worth roughly £76…
A gas boiler lasts 10 to 15 years on average. Efficiency drops significantly after year 10, adding £120 to yearly bills. Replace if it's over 12 years old or repairs…
A combi boiler costs £1,500–£3,000 installed, while a system boiler costs £2,000–£4,500. Combi suits smaller homes with no cylinder space; system boilers handle higher hot water demand in larger properties.…
Best smart heating controls for UK homes cost £120–£1,200 in 2026, depending on zones and TRVs. A basic smart thermostat with app control and weather adaptation can cut bills by…
Yes, you need radiators 2.5 to 3 times larger for a heat pump. Gas boilers run at 65-75°C, while heat pumps operate at 35-55°C, cutting radiator output by 40-50%. Check…
Yes, heat pumps work in older UK homes. Over 80% of pre-1990 properties are suitable after standard insulation upgrades, reducing annual heating costs to £850-£1,100 for a typical 1930s semi,…
After the £7,500 Boiler Upgrade Scheme grant, an air source heat pump costs £3,500–£7,500 installed. Running costs are 20–40% lower than gas, saving a typical 3-bed home £200–£350 per year.
Moving a boiler to the garage costs £1,800–£4,500 for a standard combi relocation. The final price depends on flue length, gas pipe runs, and whether the garage is attached or…
Most existing radiators can work with a heat pump, but only if they are oversized enough to deliver your home's heat loss at 45°C flow temperature. At this lower temperature,…
Yes, a magnetic filter is worth it for most homes. Installed at £150-£300, it can save £40-£120 yearly by preventing sludge buildup. Major boiler warranties often require one. That makes…
No, electric boilers cost roughly £3,000 per year versus £955 for gas on standard 2026 tariffs. Gas is about 3.6 times cheaper per kWh of delivered heat, even accounting for…
A radiator cold at the bottom is almost always due to sludge or debris blocking water flow. Bleed the radiator first, then consider a powerflush costing £300-£600 to restore even…
Summer boiler service prices are £60-£90, saving £20-£30 vs winter. Book between April and June for the lowest cost, when engineer availability is highest and price competition kicks in.
Smart radiator valves can save £60 to £100 per year on heating bills in a three-bedroom semi-detached house. The exact saving depends on how many rooms you leave unheated and…
Topping up boiler pressure often costs £12-18 a year in wasted gas at the October 2026 Ofgem price cap. Monthly top-ups signal a leak or faulty part that needs prompt…
A stuck diverter valve is the most common reason, costing £150-£350 to fix. Thermostat faults (£80-£200) and programmer errors (£50-£150) are also possible. All figures come from Checkatrade 2026 and…
Turning your boiler off at the mains in summer can save around £34 over 120 days by avoiding the 28.5p daily gas standing charge. However, system boilers with hot water…
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.
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…
