Fully Insured Gas Safe Registered 0% Finance Available Price Match Guarantee Flexible Payment Options

Gas Safe Registered 0% Finance Available Price Match Guarantee Flexible Payment Options Fully Insured

0% Finance Available Price Match Guarantee Flexible Payment Options Fully Insured Gas Safe Registered

Gas Safe Registered 0% Finance Available Price Match Guarantee Flexible Payment Options Fully Insured

Take advantage of our boiler scrappage scheme and save money.

Welcome to Cosy Boilers, we are a Hertfordshire based company established over 30 years ago, who provide A rated energy efficient boiler installation across Hertfordshire, London and Essex.

If your boiler is ageing, it is likely to be less efficient which could be adding an extra £200 per annum on your energy costs. A new energy efficient A rated boiler can keep your home warmer as well as saving you money.

Replace your boiler with us and you could save up to £300 with our boiler scrappage scheme.

Our boilers come with extended warranties so you don’t need to worry about expensive repairs. They can also be supplied with smart thermostats to enable you to control the temperature in your home wherever you are, therefore turning your home into a Smart Home and reducing your carbon footprint.

Cosy Boilers are a highly accredited boiler installation company who provide a high standard of service and professionalism.

Why choose us?

Happy Customers

Open Daily

Gas Safe

Napit Approved
Electrical Installers


Installed in
24 Hours

One Fixed Price & Price Match Guarantee

No Deposit

Price Match Guarantee

Cosy Boilers will match any like-for-like boiler installation from any reputable Boiler Installation Company. A “reputable” Boiler Installation Company is one that is a registered company in England that uses Gas Safe Qualified Engineers.

Don't just take our word for it

Nick T
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Billy and Joe plus another 3 arrived at 7am as agreed to replace a boiler, pump,6 new radiators, an all round central heating upgrade. The first job was carpet protection to all areas it’s refreshing to have professional tradesmen that respect your property, everyone new exactly the scope of works. The job was totally completed unwanted materials properly disposed of and all relevant documentation completed by 6pm. Billy oversaw every aspect. I was left with a fully commissioned system and our property was spotless. A highly recommended professional knowledgeable top notch company. Brilliant thanks to Billy, Joe the entire team excellent!
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They dealt with an issue at my mums house, came Bill came round 15 mins after first message was sent, understood the issue and arranged a time to come back. Both lads were professional, hard working, tidy and responsive. Would definitely recommend these lads to anyone looking for work to be done. Couldn't have wished for better tradesman.
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As usual bill did an excellent job. We have used him several times from full boiler installation to servicing. Quick, courteous and always on hand to answer questions, I can not recommend him and his team highly enough.
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Billy’s team installed new radiators throughout our house for us with the upmost care and expertise. Incredibly the floorboards afterwards looked almost untouched and the fittings were spot on. Brilliant work, would wholeheartedly recommend.
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Had old boiler, old storage tanks (hot&cold) etc removed and replace with modern combi boiler system. Quick, clean & efficient - 3 guys worked 13hrs and completed job in one day. Excellent service and great heating system.
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Great work very pleased with our new boiler. Guys worked very hard to complete in one day. Very tidy and professional would definitely recommend.
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Cosy boilers installed a new valiant boiler for us. Great service clean and tidy workers. Would use again and have recommended to friends.
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Billy and his team installed a new heating system in our home. Very happy with the work carried out. Will use again.
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