What’s the Difference Between Condensing and Non-Condensing Boilers?

Selecting a brand new boiler can be difficult. Along with picking between a combi, system or conventional model, you’ll also be considering condensing and non-condensing boilers. If you’ve never got a new boiler before, it can be easy to get confused by all your options.

If you’re not sure about the difference between condensing and non-condensing boilers, you’re in the right place. Read on for some help with picking between a condensing and non-condensing boiler.

How are condensing and non-condensing boilers different?

The main distinction between condensing and non-condensing boilers is their efficiency. Non-condensing boilers typically have an efficiency of 55-78%, depending on how old they are. Condensing boilers, on the other hand, can be up to 92% efficient.

Why are condensing boilers typically more efficient?

Condensing boilers are usually more efficient than non-condensing boilers as they retain waste heat and recycle it. They use the heat in flue gas to pre-heat the cold water feeding into the boiler. This reduces waste and increases efficiency, meaning that you’ll buy less fuel and get more heat.

What sort of boiler should I get?

The UK government says that when you buy a new boiler it should be condensing unless there’s sufficient reason why not. This is because, in addition to being more efficient, condensing boilers also produce fewer carbon emissions and are safer than non-condensing boilers.

If you’d like to get a new gas boiler, it’s a good plan to get a new boiler survey. This involves asking a boiler engineer to take a look at your existing system and suggest the best replacements. Your engineer will tell you whether you can fit a condensing boiler or not and help you get permission to install a non-condensing one if you need it.

Make sure that you hire an engineer who is on the Gas Safe register, so their work is legal and safe.

If you want to find a pro to give you some advice or install a new boiler, complete our online form. We’ll connect you with up to 4 local Gas Safe registered boiler engineers.

Looking for a Boiler Engineer?