New boiler. Fixed price. Installed fast.

Get an instant online quote and book your installation in minutes.

Local Gas Safe engineers • No surveys • No hidden costs • 0% Finance available

Get my fixed price

Takes 2 minutes • No obligation

Modern Boiler
Baxi
Ideal
Viessmann
Worcester Bosch

Get your new boiler in 3 simple steps

Get your fixed price online

1.Get your fixed price online

Answer a few quick questions and receive an instant, upfront quote.

Choose your boiler & installation date

2.Choose your boiler & installation date

Pick the boiler that suits your home and a date that works for you.

Expert installation

3.Expert installation

A Gas Safe engineer installs your boiler and tests everything before sign-off.

Get my fixed price

Everything you need, nothing you don't

Built by engineers. Designed to be simple, fair and stress free.

Gas Safe & fully vetted

Gas Safe & fully vetted

Trusted professionals

Next day installation available

Next day installation available

Quick, reliable installation

No hidden costs

No hidden costs

Ever

Pay monthly

Pay monthly

Flexible finance options

UK support

UK support

Before and after your install

Up to 10 year warranty

Up to 10 year warranty

Parts & labour included

Mascots

Everything included in your fixed price

  • Boiler supply & professional installation
  • Removal & disposal of your old boiler
  • Controls set-up and full system testing
  • System flush for clean, efficient heating
  • Gas Safe certification
  • Manufacturer warranty registration
  • Clean and tidy finish

No hidden extras. We agree everything with you first.

Only the UK's most reliable boiler brands

All boilers are supplied with manufacturer warranties and long term support.

Baxi

Baxi

Robust value and durability

Ideal

Ideal

Affordable, user-friendly, UK-made quality

Viessmann

Viessmann

Advanced German tech & efficiency

Worcester Bosch

Worcester Bosch

Premium reliability & brand recognition

Combi boilers

Heats your home and hot water instantly from one compact unit, with no tanks or cylinders.

System boilers

Uses a separate hot water cylinder to store water, making it ideal for homes with multiple bathrooms and higher demand.

Regular boilers

Heats your radiators and stores hot water in a separate cylinder, using cold water tanks in the loft and separate controls.

Not sure which type you have? We'll recommend the right boiler for your home and budget.

Spread the cost with 0% interest free finance

0% finance available on all boiler installations.

Apply online in minutes with a decision in as little as 60 seconds.

Finance provided by Kanda Finance Ltd, authorised and regulated by the Financial Conduct Authority. Credit subject to status and affordability. Terms apply.

Meet the people behind BoxHeat

Tony

Tony

Gas Safe registered engineer

Tony is a Gas Safe registered engineer with over 10 years' hands-on experience, installing and replacing boilers across Sheffield and surrounding areas. Working on the tools every day, he saw how unclear pricing and rushed installs let homeowners down - and built BoxHeat to do things properly.

David

David

Customer operations and aftercare

David brings over 20 years' experience in building and running efficient, customer focused operations. He ensures BoxHeat is organised, reliable, and structured around the right people doing the job the right way, from first enquiry through to installation and aftercare.

Together, they built BoxHeat to deliver fixed price installations led by engineers.

Frequently asked questions

Prices vary by home, but you'll see your fixed price instantly online. The exact boiler replacement cost depends on your home size and whether you need a Combi, System, or Regular boiler. At BoxHeat, we provide an instant fixed price quote online so you know what you'll pay, down to the penny—before you book.

Most straightforward boiler swaps are completed in just 1 day. If you are converting from an old system boiler to a modern Combi boiler, the installation may take up to 2 days. Our Gas Safe engineers work efficiently to get your heating and hot water back up and running as quickly as possible.

Yes. All installations are carried out by Gas Safe registered engineers.

Never. We pride ourselves on a transparent fixed-price service. If your installation requires non-standard work, we will identify this and agree on the price with you before any work starts. There are no hidden fees or upsells on installation day.

All our boilers come with comprehensive manufacturer warranties, up to 10 years depending on the brand and model. We also register the warranty for you, giving you total peace of mind for the next decade.

Get your fixed price or speak to a Gas Safe engineer?

Answer a few quick questions for an instant, fixed price — or talk it through with a qualified Gas Safe engineer before you book.

Get my fixed price

Takes 2 minutes • No obligation

Speak directly to a Gas Safe registered engineer: