Boilers advice guides

15 articles

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.

How to buy the best boiler

By Matthew Knight

Expert advice on how to find the best boiler for your home. From picking the right size to the ideal type, we'll help you buy a boiler that won't let you down. Combi, heat-only and system boilers all explained.

2 March 2021

Buying a new boiler

By Matthew Knight

Buying a new boiler is a big and expensive decision. Here are five things you should know before you get a new boiler.

Five things to know before buying a new boiler How much does a new boiler cost?How to get a free boiler or grant?How to get the best boiler installation What are the different types of boiler?What is a condensing boiler?

2 March 2021

Five signs you need a new boiler

By Which?

Boiler faults can be frustrating, costly and dangerous – but they aren't always obvious. Here are the warning signs that your boiler needs replacing

15 February 2021

Getting the best boiler service

By Which?

Find out how you can get the best boiler service to keep your boiler in tip-top condition.

2 March 2021

Common boiler problems and repair costs

By Matthew Knight

Which? reveals the most common problems with boilers, how to fix them, and how much it should cost if you can't do it yourself.

15 February 2021

Five tips to reduce your heating bills

By Which?

Find out how to reduce your heating bills and improve your home's efficiency. So you'll not only save money, but also keep warm and cosy

8 February 2021

Best boiler brands rated

By Matthew Knight

Find out which boiler brand is the most reliable and which is likely to let you down during the cold months. We reveal if a Baxi will outlast a Worcester Bosch so you know if you're investing in a quality boiler brand

2 March 2021

Boiler brand guides

By Matthew Knight

Find out whether we think Alpha boilers are a good investment. Our research reveals how reliable Alpha boilers are, and what their owners and heating engineers think of them

Alpha boilers rated Ariston boilers rated Baxi boilers rated Biasi boilers rated British Gas boilers guide Ferroli boilers rated Glow-worm boilers rated Grant oil boilers rated Heatline boilers rated Ideal boilers rated Intergas boilers rated Johnson & Starley boilers rated Main boilers rated Potterton boilers rated Vaillant boilers rated Viessmann boilers rated Vokera boilers rated Worcester Bosch boilers rated Worcester Bosch oil boilers rated

15 February 2021

Best oil boiler brands

By Matthew Knight

We reveal the oil boiler brands you can trust. Once you know the best oil boiler brands, use our boiler reviews to choose the right one for you

6 October 2020

Best combi boiler brands

By Matthew Knight

If you want to buy the best combi boiler, you'll need to make sure it's the correct size for your home, and from a reliable brand.

15 February 2021

Which boilers are most energy efficient?

By Matthew Knight

Find out which boilers are the most energy efficient and how it's measured.

2 February 2021

Boiler controls and thermostats

By Matthew Knight

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

1 March 2021

How to balance your radiators

By Matthew Knight

Find out how to tell if your radiators are balanced, and how to balance them.

15 February 2021

How to thaw a frozen boiler condensate pipe

By Matthew Knight

Watch our video to find out how to safely thaw your boiler's condensate pipe.

10 November 2020

How we assess boilers

By Matthew Knight

Here you can find out more about how Which? assesses boiler brands to reveal the best boilers that we recommend.

10 November 2020