Boiler Installation SussexDone Right, First Time.
Local Gas Safe engineers, serving Sussex and Surrey since 1988. Over 1,000 homes warmer. Yours could be next.
Gas Safe Registered
Registration No. 575142 — All engineers certified
New Boiler Installation
Combi, system, or regular — we'll recommend the right boiler and have it installed, guaranteed, in a day. Up to 12-year guarantee, finance available.
Boiler Servicing & Repairs
An annual service keeps your boiler efficient, your warranty valid, and your home safe. Something not right? We diagnose fast and fix it properly.
Expert Local Heating Services
Sussex's Trusted Local Heating Company
There's something deeply satisfying about a home that's properly warm. At Boilers On-Demand, that's all we focus on — expert boiler installation in Sussex and Surrey, carried out by engineers who genuinely care about the quality of their work.
We're not a national call centre. We're a local team, based here, serving homeowners across East Sussex, West Sussex, and Surrey with honest advice and installations that last.
As a Gas Safe registered company (No. 575142), every installation is carried out safely, legally, and to the highest standard. With over 36 years of experience and 1,000+ boilers installed, we're the trusted local choice for dependable home heating.
What We Do
Complete Home Heating, All in One Place
New Boiler Installation
Combi, system, or regular — we'll recommend the right boiler and have it installed, guaranteed, in a day. Up to 12-year manufacturer guarantee with finance options available.Right boiler, installed in a day. Up to 12-year guarantee.
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Boiler Servicing
An annual service keeps your boiler efficient, your warranty valid, and your home safe. Carried out by Gas Safe registered engineers.Annual servicing to keep your boiler safe and efficient.
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Boiler Repairs
Something not right? Our engineers diagnose fast and fix it properly. We attend promptly and resolve faults properly, first time.Fast diagnosis and reliable repairs you can trust.
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Power Flushing
Clear the sludge from your system and give your new boiler the best possible start. Improves efficiency and extends the life of your heating system.Clear sludge for better efficiency and boiler performance.
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Heat Pumps
Energy-efficient, low-carbon heating for the modern home. MCS-accredited installation with access to Government Boiler Upgrade Scheme grants up to £7,500.Low-carbon heating with government grants available.
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Landlord Gas Safety
Annual checks and certificates — your legal obligation, handled. Same-day certificate issuance across Sussex and Surrey.Legal annual safety checks and CP12 certificates.
Find out more30+
GOOGLE REVIEWS
1,000+
NEW BOILERS INSTALLED
36+
YEARS EXPERIENCE
Vaillant ecoTEC Plus Remastered
- Smart home-ready for modern living
- Advanced IoniDETECT technology
- Auto-adapts to gas quality
- Up to 12-year guarantee
Vaillant Boiler Installation
Industry-Leading
Boiler Brands
Boilers On-Demand installs, services, and repairs a wide range of leading boiler brands, including Vaillant, Glow-worm, and Baxi, ensuring homeowners have access to reliable, proven heating systems backed by expert care.
One standout option we regularly install is the Vaillant ecoTEC plus remastered, a smart home-ready gas boiler designed for modern living. Featuring advanced IoniDETECT technology, it automatically adapts to gas quality to maintain optimal efficiency and performance at all times.
Why Homeowners Choose Us
Why Homeowners Choose Boilers On-Demand
Gas Safe Registered — No. 575142
Every installation carried out safely, legally, and to the highest standard. Verify our registration directly on the Gas Safe Register.
Premium Brands, Up to 12 Years Guaranteed
We install Vaillant, Glow-worm, and Baxi boilers — chosen for reliability and efficiency, backed by manufacturer guarantees of up to 12 years.
Flexible Finance Available
Spread the cost of your new boiler across manageable monthly payments, so you can choose the right boiler for your home without compromise.
Installed in a Single Day
We arrive when we say we will, work cleanly, and leave your home exactly as we found it — just with a far better boiler in place.
Customer Reviews
What Our Customers Say
Paul Coventry has completed a successful job replacing my old back boiler with a new one in the loft. Also replaced my cold water tank and smartened up pipe work. Really good attitude and attendance etc. Knows his stuff.
Dave Saunders
3 months ago
Prompt, communicative, cost effective and professional.
Adam Knight
3 months ago
Just had Paul from cpl come to instal a new under sink hot water system, sink and vanity unit. Very impressed with professional he is.
Carl Roper
4 months ago
Brilliant customer service, lovely friendly chap that explained everything to us that we were unsure of.
Joe Hayes
5 months ago
Top Service — We have had boiler services, radiator instals and movements, bathroom plumbing. Thoroughly recommend.
Stu MacGarvie
9 months ago
Great communication, speedy install (arrived on time, installed and commissioned boiler in a day) and great tidy up. Very happy.
Robin Howard
6 months ago
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Contact Us
Ready for a Warmer Home?
Call us, email, or request a quote online. We'll get back to you quickly with clear, honest pricing — and no pressure.
We've been keeping Sussex and Surrey homes warm since 1988. We'd love to do the same for yours.
● FAQs
Frequently Asked Questions
Everything you need to know before booking.
What boiler brands do you install?
We install Vaillant, Glow-worm, and Baxi boilers, chosen for reliability and efficiency, backed by manufacturer guarantees of up to 12 years.
How long does a boiler installation take?
We install boilers in a single day. We arrive when we say we will, work cleanly, and leave your home exactly as we found it — just with a far better boiler in place.
Are your engineers Gas Safe registered?
Yes. All our engineers are Gas Safe registered. Our registration number is 575142, which you can verify directly on the Gas Safe Register before we visit.
What guarantee comes with a new boiler?
We install Vaillant, Glow-worm, and Baxi boilers with manufacturer guarantees of up to 12 years, giving you long-term peace of mind.
Can I spread the cost of a new boiler?
Yes. We offer flexible finance options so you can spread the cost across manageable monthly payments and choose the right boiler for your home without compromise.
What areas do you cover?
We cover East Sussex, West Sussex, and Surrey — including Eastbourne, Brighton, Hastings, Lewes, Bexhill-on-Sea, Crowborough, Royal Tunbridge Wells, Uckfield, Hailsham, Seaford, Rye, and surrounding areas. Not sure? Just call us.
Do you offer landlord gas safety certificates?
Yes. We carry out annual landlord gas safety checks and issue CP12 certificates across Sussex and Surrey, often on the same day.
● AREAS WE COVER
Local to You Across Sussex and Surrey
Our engineers are based locally and cover the full breadth of East and West Sussex, as well as Surrey.
Eastbourne · Brighton · Hastings · Lewes · Bexhill-on-Sea · Crowborough · Royal Tunbridge Wells · Uckfield · Hailsham · Seaford · Rye · and surrounding areas.
Not on the list? Call us, we will most likely cover you.