Boiler Installation
New Boiler Fitted in a Single Day
A new boiler from Whitebox Heating means a reliable, efficient heating system fitted by Gas Safe engineers who know your area. We specialise in the Worcester Bosch Greenstar 4000 and Vaillant ecoTEC Plus – two of the UK's top-rated combi boilers – installed across West Sussex, East Sussex, and Surrey, usually in a single day.
Boilers We Install
We supply and fit the UK's most trusted combi boiler brands
Worcester Bosch Greenstar 4000
Vaillant ecoTEC Plus
What to Expect From Our Boiler Installation Service
Free Home Survey
We visit your home, assess your heating requirements, and recommend the right boiler type and output. No obligation, no pressure.
Leading Brands
We supply and install Worcester Bosch Greenstar 4000 and Vaillant ecoTEC Plus combi boilers — two of the most reliable and efficient units on the market, both backed by manufacturer warranties of up to 10 years.
Installed in a Day
Most like-for-like replacements are completed in one working day. We remove the old boiler, install and commission the new one, and leave your home clean and tidy.
System Flush Included
Every installation includes a full central heating system flush with inhibitor to remove sludge and protect your new boiler from day one.
Warranty Registration
We register your new boiler warranty with the manufacturer as standard. You don't need to do a thing – it's all part of our service.
Finance Available
Spread the cost of your new boiler with flexible payment options. Ask us for details when booking your free survey.
How It Works
Free Survey
We visit your home, assess your needs, and provide a detailed written quote with no obligation.
Choose Your Boiler
We recommend the best options for your home and budget. You choose the boiler you're happy with.
Installation Day
Our engineers arrive on time, fit your new boiler, flush the system, and commission everything fully.
Handover
We walk you through your new boiler, register the warranty, and issue all Gas Safe documentation.
Boiler InstallationAcross RH & BN Areas
We provide boiler installation services across West Sussex, East Sussex, and Surrey. Click your area for a location-specific page.
Ready to book?
Call now for same-day availability – no waiting, no fuss.
Boiler Installation – FAQ
How much does a new boiler cost?
A new combi boiler supply and installation typically costs between £1,800 and £3,500 depending on the brand, model, and complexity of the installation. We provide a fixed, itemised quote after the free survey so you know exactly what you're paying.
Which boiler is best for my home?
The best boiler depends on your property size, number of bathrooms, and whether you have a cylinder. We specialise in the Worcester Bosch Greenstar 4000 and Vaillant ecoTEC Plus — both excellent combi boilers with strong warranties and proven reliability. Your surveyor will advise on the right model and output during the free survey.
Can you do a like-for-like replacement?
Yes. A like-for-like replacement – fitting a new combi where an old one was – is the quickest and most affordable installation option, typically completed in one day.
Do I need to move my boiler?
Not necessarily, but sometimes relocating a boiler (for example, to a kitchen cupboard or utility room) makes sense as part of a larger renovation. We can advise on the options and the additional cost involved.
How long is the boiler warranty?
Most of the brands we install come with manufacturer warranties ranging from 5 to 12 years. Worcester Bosch and Vaillant offer extended warranties when installed by accredited engineers, which we are.
Get in touch
Book a Boiler Installation Engineer Today
Call us now for a free quote or to book a same-day visit.
Unsure which brand to choose? Our independent boilers ratings guide compares Worcester Bosch, Vaillant, Ideal, Baxi and more — with honest pros, cons and prices. Want to understand what the efficiency labels actually mean? Read our guide to a rated boilers — including how much you could save by switching from an older model. If you need boiler installations in Gatwick or the surrounding RH6 area, see our dedicated local page for availability and pricing. Need a new boiler in Uckfield or the East Sussex TN22 area? We cover Uckfield, Heathfield, and Crowborough with free surveys and same-day installation.