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Which? Trusted Trader

for 2 years running

Working with the best

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A clear, simple process

We help homeowners access fast, reliable home-energy solutions.

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Answer a few quick questions about your home and current boiler.

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Choose from a range of top-rated boilers that fit your home and budget.

0% APR finance available

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Choose install date

Pick your date, we can install as soon as next day (order before 3 pm).

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Only the best A-rated energy efficient boilers

Boilers that cut your monthly bills.

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Suitable for kitchen cupboards

Glow-worm Compact C24 24kW glow-worm

Glow-worm Compact

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5-Year Warranty

Hand-built in Derbyshire

Glow-worm's compact boiler

5 year warranty

Fixed price (inc. VAT)

£1,879

£1,979

or, monthly from

£39

Shop Glow-worm

Best value

Alpha E-Tec NX 28kW Alpha E-Tec NX 28kW overlay alpha

Alpha Etec NX

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11-Year Warranty

Ideal for small and medium homes

Stainless steel heat exchanger

Compact stylish design

Fixed price (inc. VAT)

£2,029

or, monthly from

£42

Shop Alpha

Budget boiler

Compact

Worcester Bosch 1000 24kW Worcester Bosch 1000 24kW overlay worcester

Worcester Greenstar 1000

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5-Year Warranty

Designed for cupboards

Great design at a lower price

Innovative 'QuickTap' water saving

Fixed price (inc. VAT)

£2,199

or, monthly from

£46

Shop Worcester

Which? Best Buy Boiler

Best seller

Worcester Bosch 2000 25kW Worcester Bosch 2000 25kW overlay worcester

Worcester Greenstar 2000

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7-Year Warranty

Worcester's quietest combi boiler

Big brand budget boiler

New sleek compact design

Fixed price (inc. VAT)

£2,229

£2,279

or, monthly from

£46

Shop Worcester

Modern new design

Worcester Bosch 4000 25kW Worcester Bosch 4000 25kW overlay worcester

Worcester Greenstar 4000

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10-Year Warranty

Our most popular boiler

Innovative 'QuickTap' water saving

Powerful to meet your needs

Fixed price (inc. VAT)

£2,329

or, monthly from

£49

Shop Worcester

Modern but affordable

Viessmann Vitodens 050-W 30kW viessmann

Viessmann 050

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10-Year Warranty

10 year warranty

Compact dimensions & quiet

Fits into kitchen cupboards

Fixed price (inc. VAT)

£2,449

or, monthly from

£51

Shop Viessmann

Why choose us for your new boiler?

We provide more than just a boiler. Compare our fixed-price service with standard local installers to see the difference.

Pricing:

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iHeat:

Fixed Price Guarantee

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Others:

Estimates that often change

Warranty:

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iHeat:

Up to 10-Year Warranty

Cross
Others:

Standard 2-5 year coverage

Engineers:

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iHeat:

Vetted Gas Safe Experts

Cross
Others:

Varies by subcontractor

Finance:

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iHeat:

0% APR & No Deposit

Cross
Others:

High interest or cash only

Installation:

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iHeat:

Next-Day Available

Cross
Others:

1-2 week waiting times

Hidden Fees:

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iHeat:

Everything Included

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Others:

Extra charges for parts

Flexible Ways to Pay

0% Interest-Free Credit icon

0% Interest-Free Credit

Spread the cost without extra fees

Buy Now, Pay Later icon

Buy Now, Pay Later

Nothing to pay for 12 months

Low Monthly Payments icon

Low Monthly Payments

Small installments for up to 10 years

Peace of Mind Guaranteed

We're committed to providing you with the highest standards of service, backed by industry-leading certifications and thousands of satisfied customers.

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Which? Trusted Trader

Independently endorsed for exceptional quality and trustworthy service.

Trustpilot 5 star rating

5★ Trustpilot Rated

Over 10,000 verified 5-star reviews from real customers across the UK.

FCA Authorised logo

FCA Authorised

Approved credit broker offering secure, transparent finance options.

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Gas Safe Engineers

Fully qualified and legally certified for safe boiler installations.

Professional service from
engineers you can trust

Gas Safe registered experts, installing nationwide.

Our vetted engineers ensure a clean, safe, and perfect setup for your home.

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Gas Safe engineer installing boiler
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Professional boiler installation service
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Thousands of happy customers

Watch real stories from homeowners across the UK
who upgraded with iHeat.

Testimonial video

Great experience with iHeat - customer service was excellent and very responsive.

Staylor

Boiler
Testimonial video

Pricing a lot cheaper than competitors - installation completed in less than 2 days from order.

Mr L.

Boiler
Testimonial video
Testimonial video

Replacement costs below average - new boiler was fitted and running within less than 2 days.

David

Boiler
Testimonial video

Booked next day installation - kept updated throughout the process.

Samuel

Boiler
Testimonial video

Very competitive price - staff bent over backwards to help solve issues.

Andy

Boiler
Testimonial video

100% recommend iHeat - very easy and straightforward process.

Emily

Boiler
Testimonial video

Booked install just two days ahead - right before Christmas! Installation was smooth.

Adrian

Boiler

Fantastic from start to finish - online ordering was straightforward and quick.

Gareth

Boiler

Everything you need to know

Find quick answers to our most common questions.

Boiler help & expert guides

Why You Can Trust iHeat

Why You Can Trust iHeat

Over 10,000 reviews and an 'Excellent' rating on Trustpilot, thats some good going!

Rick Hope profile photo

Rick Hope

Managing Director

23 January 2026

News

Boiler Brands To Avoid - Worst Boilers in 2026

Boiler Brands To Avoid - Worst Boilers in 2026

This guide covers the boiler brands most often flagged as higher risk, plus the key warning signs to...

Stephen Day profile photo

Stephen Day

Gas Safe Engineer

16 January 2026

Guides

Best Combi Boiler 2026

Best Combi Boiler 2026

Here’s a quick roundup of the best combi boilers for 2026.

Stephen Day profile photo

Stephen Day

Gas Safe Engineer

15 January 2026

Guides

Best Compact Combi Boilers For Small Homes

Best Compact Combi Boilers For Small Homes

A simple guide to the smallest combi boilers that fit inside kitchen cupboards and tight spaces.

Stephen Day profile photo

Stephen Day

Gas Safe Engineer

14 January 2026

Guides

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