Boiler Buying Guide

A new boiler is likely to be one of the most expensive household purchases you’ll make – so it’s important to choose the best new boiler for your home, at the right price.

New boiler checklist

First, you need to decide which type of new boiler to go for. Here’s what you should consider: Fuel type Most UK households have a gas heating system equipped with a gas boiler. But if you’re one of the the estimated 4.3m households not connected to the UK’s gas network, there are alternatives. These include fitting an oil boiler, liquid petroleum gas or LPG boiler, or a wood-burning stove fitted with a back boiler. See our home heating systems guide or heating oil guide for more information.

Boiler type

If you have a gas heating system with a gas boiler, you need to choose between: a combination (or combi) boiler, which provides heat for your radiators and domestic hot water on demand or a heat-only boiler, which is connected to a hot water storage system. Our combi boiler guide will help you decide which type of boiler is best for you. Alternatively, ask a professional installer for their opinion.

Boiler efficiency

If you have gas central heating, your boiler will account for around 60% of your home’s CO2 emissions, according to the Energy Saving Trust. This makes your choice of boiler a key priority if you’re looking to cut your energy bills and carbon footprint.

Heating controls

Heating controls let you take charge of when, where and at what temperature your heating is operating. It’s a good way of managing your heating costs, as you can ensure that your heating is only on certain rooms at certain times. When you come to replace your boiler, it may be a good time to install a heating control system. Find out more with our guide to the best boiler controls.

Boiler installation

Don’t attempt to install a replacement boiler yourself – leave it to the professionals. Find a competent heating engineer on the Gas Safe Register (the gas registration scheme previously run by Corgi) to do the work for you. To be sure of a tradesperson’s credentials, ask to see their Gas Safe Register ID card or run a check on the Gas Safe Register website. Always get at least three quotes for boiler installation and make sure they include all costs including any call-out fees. Don’t be taken in by any headline discount figures – look at the total price of the boiler and labour charges. You may find that some installation companies, including services offered through British Gas and other energy companies, will suggest a replacement boiler for you rather than allowing you to choose your preferred model. If you already have a specific boiler model in mind, make this clear to the installer from the outset.