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New boilers, why you should ditch your old one

There’s a moment when I was a kid that I’ll never forget. 

My family were all in the kitchen when our boiler started making a weird whistling noise.

I’d never paid the metal box on the wall any attention before, but we were all looking at it now.

As the whistling got louder, my mum and dad moved towards it. 

And then, BANG! 

It exploded and spat fire and smoke into the room.

Luckily, none of us were hurt. But as well as buying a new boiler, we had to redecorate the kitchen. 

Your boiler might not go wrong quite as dramatically, but boilers that are over 10 years old could be well past their best.

More efficient

The technology in gas boilers has improved massively in the last decade. One major development in particular is how boilers recycle hot water by condensing it. And since 2005, every new gas-fired boiler fitted must be a condensing boiler.

How it works is pretty technical. The main difference is that it converts more gas into heat for your home than older boilers. 

This new tech means that with an A-rated boiler every £1 you spend on gas at least 90p will go to heating your home.

That’s quite a saving compared to G-rated ‘standard efficiency’ boilers. They’re only able to get to 70% efficiency, that’s 70p for every £1 will heat your home. The rest is wasted.

That might not sound like a lot, but it adds up. Here’s comes the maths:

The average annual gas bill in the UK for 2018 was £676.

20p better efficiency could save you £135.20 each year.

Gas boilers last around 10-15 years (on average) so over 15 years you’ll save...drum roll...


Even with my crude maths, and based on average figures, that’s less than the cost of a new boiler.

But that's not all.

Boilers get less efficient over time. As they age parts get rusty and wear out, limescale and other deposits build up in its pipes and soon your G-rated boiler will make less heat for the same amount of gas. Meaning you'll have to run it longer to warm up your home or heat your water to the same temperature.

Costing you more.

Better for the environment

Better energy efficiency isn’t just good for your bank balance it’s better for the environment too. 

Natural gas is, of course, a fossil fuel (mainly methane). When we burn it in our boilers, we release toxic carbon monoxide (CO) into the air. 

Carbon monoxide doesn’t contribute to global warming in the same way carbon dioxide or methane (the ‘Greenhouse gases’) do. But it does affect how much carbon dioxide and methane is in our atmosphere

That’s bad. 

More efficient boilers will release less carbon monoxide making our air cleaner.

That’s better.

If you need a new boiler, take a look at our boiler replacement page. You could have a brand new, energy efficient boiler installed the next day.

Low carbon heating

Burning natural gas to heat our homes will always be damaging to the environment.

But there are other ways.

Electric heating using renewable and low carbon energy looks like it’ll be the way we heat our homes in a cleaner, greener future.ђ