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.

9 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.

Best boiler brands

Discover the best gas and oil boiler brands: which are most reliable and which are likely to let you down? Make sure you choose a boiler from a quality brand.

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.

Top tips to reduce your heating bills

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

7 June 2024

Boiler energy efficiency explained

New gas and oil boilers are all A-rated, but that's only half the picture. Here's why an A rating isn't all you need to think about

4 June 2024

Electric boilers: what you need to know

From the pros and cons of electric boilers to the top two brands rated, we'll help you decide if going for a non-gas boiler is right for you

12 December 2023

How we assess boilers

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

12 December 2023

Boiler controls and how they can save you money

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

12 December 2023

Hydrogen boilers: what you need to know

Hydrogen has been hailed as the 'green' gas that could be heating our homes in the future, but the reality is complicated. We explain how hydrogen boilers would work, the potential costs, and why marketing claims can confuse consumers.

2 November 2023