About Boilers On-Demand | Gas Safe Heating Engineers in Surrey & Sussex
36 years. 1,000+ installations. One name Surrey and Sussex homeowners keep passing on to their neighbours.
Call 01903 802395We're Not the Biggest. Just the Most Trusted on Your Street.
Boilers On-Demand was built the old way — on honest work, word-of-mouth, and showing up when it matters.
Paul Coventry founded this business over 36 years ago with a simple idea: do the job properly, treat people well, and the rest takes care of itself. That's still how we run things today.
We're Gas Safe registered (No. 575142), City & Guilds qualified, and fully insured. But more than the certifications, we're the team that actually answers the phone, turns up on time, and doesn't leave until you're comfortable with everything.
Our Story
Who We Are
We're a local heating company based in the BN44 area, covering Surrey, Sussex, and the surrounding towns and villages.
We're not a call centre. We're not a national contractor who sends whoever's available. Every engineer on our team has been trained to the same standard — Gas Safe registered, City & Guilds qualified, and experienced enough to know that every home is different.
When you call Boilers On-Demand, you speak to someone who knows the area, knows the homes, and gives you a straight answer.
Our Services
What We Do
We focus on what we're best at — the big-ticket heating work that makes a real difference to your home and your bills.
Boiler Installation
New boilers supplied and fitted across Surrey and Sussex. Combi, system, and regular — we'll tell you which suits your home, not which suits our margin. Up to 12-year guarantee on every installation.
Find out moreHeating Upgrades
Air source heat pumps, smart thermostats, and modern heating systems. We're MCS-accredited and registered for the Boiler Upgrade Scheme — so if you're eligible for up to £7,500 in government funding, we'll handle the entire application for you.
Find out morePower Flushing
Sludge, rust, and limescale kill boiler efficiency. A power flush clears the system out completely. Most customers notice the difference from the first heating cycle.
Find out moreBoiler Servicing & Repairs
Annual servicing from £80–£120. Same-day repairs available across Surrey and Sussex. All major brands covered — Vaillant, Worcester Bosch, Baxi, Glow-worm, and more.
Find out moreLandlord Gas Safety Certificates (CP12)
We issue the certificate on the day and handle your tenants' copy too. One visit. Sorted properly.
Find out moreWhy Us
Why Homeowners Choose Us — and Keep Recommending Us
36+ Years of Local Experience
We've been doing this since 1988. We know these homes, these systems, and the specific challenges that come with properties across Surrey and Sussex. That experience shows up in every job.
Gas Safe Registered — No. 575142
Every job legal, certified, and done right. You can verify our registration on the official Gas Safe Register before we visit. We'd encourage it.
Up to 12-Year Guarantee
On every boiler installation. Not a sticker on the box — a real, manufacturer-backed guarantee with our workmanship warranty on top.
Price Beat Guarantee
Found a like-for-like quote that's lower? We'll beat it by £100. Same boiler. Same standard of installation.
Flexible Finance Options
Monthly payment plans available so cost doesn't stand between you and a properly working heating system. Deposits from 20%, spread over 3–10 years.
First Year Service Free
Included with qualifying installations. We come back, check everything over, and make sure your new system is running exactly as it should.
Straight, Honest Advice
We'll tell you what your home actually needs — even if that means recommending something cheaper than you expected, or being honest when a repair makes more sense than a replacement. No pressure. No pitch.
Fully Certified
Our Credentials
- Gas Safe Registered — No. 575142
- City & Guilds Qualified
- MCS Accredited — Air & Ground Source Heat Pumps
- Unvented Hot Water Systems Qualified
- Underfloor Heating Specialist
- Boiler Upgrade Scheme Registered
- Fully Insured
By The Numbers
The Numbers That Matter
36+
Years of experience
1,000+
Boilers installed across Surrey & Sussex
30+
Five-star Google reviews
£100
Price beat guarantee
12 Years
Maximum guarantee on installations
£7,500
Maximum BUS grant we've helped homeowners claim
Service Coverage
Areas We Cover
We're based in BN44 and cover a 15-mile radius — reaching homeowners across:
Brighton | Worthing | Horsham | Crawley | Guildford | Eastbourne | Hastings | Lewes | Bexhill-on-Sea | Crowborough | Uckfield | Heathfield | Hailsham | Seaford | Polegate | Battle | Rye | Wadhurst | Chichester | Bognor Regis | Littlehampton | Haywards Heath | East Grinstead | Royal Tunbridge Wells | Woking
Not on the list? Call us. We cover far more than we can fit here.
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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Ready to Talk?
No hard sell. No obligation. Just a straight conversation about what your home needs.