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Home & garden.

Boilers advice guides

Which? boiler guides reveal tips on buying the best boiler for your home. We look into boiler prices, how much to spend on a new boiler, and rate the biggest boiler brands.

7 articles

Buying a new boiler

This guide gives you all the information you need to get the best boiler installation. Find out how to get the right type and size of boiler for your home, if you can get a free boiler, and how much you can expect a new boiler installation to cost.

Boiler brand guides

Our annual boiler survey of boiler owners and heating engineers reveals the best and worst boiler brands. Compare the biggest boiler manufacturers in the UK and find the most reliable boiler.

Boiler maintenance

While a reliable boiler brand is a great starting point, maintaining your boiler is key to avoiding an emergency boiler repair. Find out how to get a great service, DIY boiler fixes you can do, and the cost of boiler repairs if you need one.

Which boilers are most energy efficient?

Find out which boilers are the most energy efficient and how boiler efficiency is measured

2 December 2021

Top tips to reduce your heating bills

Expert tips on using heating controls and maintaining your heating system to reduce your energy bills.

24 November 2021

How we assess boilers

Find out more about how Which? assesses boiler brands to reveal the best and worst boilers

24 November 2021

Boiler controls and thermostats

Find out how to use heating controls and thermostats to save money on your heating bills.

24 November 2021