London's Heating, Plumbing and Gas Specialists. Available 24/7.
Gas Safe engineers, same day response across all London boroughs. Upfront pricing, no surprises. 45,000+ jobs completed.
Independently accredited and registered
Joe Jennings
Director, 20 Years Experience
"We're accountable for every job. That's the Heat-Plex difference."
Trusted by 10,000+ Londoners & Institutions
Know the price before we ring the bell.
Every Heat-Plex job is quoted upfront at clear London rates. No surprises on the invoice, no padded hours, no “while we’re here” extras.
- No callout fee
- No fuel or congestion surcharges
- Fixed quote agreed before we start
Heating and Plumbing, Sorted.
Boilers, bathrooms, plumbing and more. Installed and serviced across London.
New Boiler — From £1,950
Worcester Bosch & Vaillant installs with 10-year warranty. Next-day installation available.
Emergency Plumber — 24/7
We’re at your door within 60 minutes. Burst pipes, gas leaks, boiler breakdowns — no call-out fee.
HIU Specialists
Servicing, repairs, installation and compliance for Heat Interface Units across London.
Smart Heating
App-controlled thermostats and zone management. Reduce energy waste by up to 30%.
Care Plans
Priority breakdown cover, annual servicing, and zero call-out fees.
Enterprise Solutions
Mechanical services for offices, hotels and retail. Preventative contracts and plant-room refurbishment.
View Commercial Case Studies
Gold Winner — Apprentice Employer of the Year
Recognised for innovation, sustainability, and apprenticeship development. Finalist for Employer of the Year.
Boiler Installation Pricing
Fixed-price boiler installations with leading brands. All installations include full certification, warranty registration, and a 12-month workmanship guarantee.
Worcester Bosch 24kW
Combi Boiler Package
From, subject to survey
Worcester Bosch Premium
High-Efficiency Range
From, subject to survey
All prices subject to site survey and suitability. Installation includes removal of old boiler, system flush, controls, and full commissioning. Additional costs may apply for complex installations or additional materials.
Track Our Engineers.
Our fleet is always on the move across London. Watch our engineers in real-time as they respond to calls throughout the city.
The Experts.
Our engineers aren't just tradespeople; they are technical specialists vetted for expertise and professionalism.
Joe Jennings
Founder
Miles
Operations Manager
Maddie
Head of Client Services
Ilie Jucatoru
Commercial & Domestic Engineer
Marinel
Heating, Gas & Plumbing Engineer
Vaile Ciocan
Heating, Gas & Plumbing Engineer
Spencer
Plumbing & Heating
Daniel Nitulezcu
Master Builder / Multi Trades
Jackie
Admin Lead
Kim
Accounts
Ryan Crowder
2nd Year Plumbing Apprentice
Albert
Apprentice
Verified Performance.
John Danvers
"HeatPlex installed a new boiler for us. The engineer was very professional and polite. The work was done to a high standard and the price was very competitive. I would definitely recommend HeatPlex to anyone looking for a new boiler."
Sarah Mitchell
"Amazing service! Boiler broke down in the middle of winter, HeatPlex engineer arrived within 2 hours and fixed it on the spot. Fair price too. The tracking link was really helpful so I didn't have to wait in all day."
David Peters
"We use HeatPlex for our rental portfolio in Clapham. The office team is super responsive and the digital certificates make my life so much easier. Best commercial plumbers in London hands down."
Emma Thompson
"Had a leak under the sink that was ruining the floor. They came out on a Sunday evening. Fast, clean, and transparent pricing. No hidden fees. Very happy with the service."
John Danvers
"HeatPlex installed a new boiler for us. The engineer was very professional and polite. The work was done to a high standard and the price was very competitive. I would definitely recommend HeatPlex to anyone looking for a new boiler."
Sarah Mitchell
"Amazing service! Boiler broke down in the middle of winter, HeatPlex engineer arrived within 2 hours and fixed it on the spot. Fair price too. The tracking link was really helpful so I didn't have to wait in all day."
David Peters
"We use HeatPlex for our rental portfolio in Clapham. The office team is super responsive and the digital certificates make my life so much easier. Best commercial plumbers in London hands down."
Emma Thompson
"Had a leak under the sink that was ruining the floor. They came out on a Sunday evening. Fast, clean, and transparent pricing. No hidden fees. Very happy with the service."
John Danvers
"HeatPlex installed a new boiler for us. The engineer was very professional and polite. The work was done to a high standard and the price was very competitive. I would definitely recommend HeatPlex to anyone looking for a new boiler."
Sarah Mitchell
"Amazing service! Boiler broke down in the middle of winter, HeatPlex engineer arrived within 2 hours and fixed it on the spot. Fair price too. The tracking link was really helpful so I didn't have to wait in all day."
David Peters
"We use HeatPlex for our rental portfolio in Clapham. The office team is super responsive and the digital certificates make my life so much easier. Best commercial plumbers in London hands down."
Emma Thompson
"Had a leak under the sink that was ruining the floor. They came out on a Sunday evening. Fast, clean, and transparent pricing. No hidden fees. Very happy with the service."
Expert Guides
Practical advice and maintenance tips from our Gas Safe registered engineers to help you get the most from your heating system.
HIU Service London: What Every Resident and Block Manager Needs to Know
A comprehensive guide to HIU servicing in London — what it involves, why annual maintenance is critical, Ofgem 2027 compliance, and how to choose a qualified heat interface unit engineer.
HIU Maintenance: The Preventative Guide That Saves London Residents Thousands
Learn what goes wrong when Heat Interface Units aren't maintained, the warning signs to watch for, and how planned HIU maintenance protects your heating system and wallet.
How to Choose a Heating Engineer in London: Credentials, Red Flags and What to Expect
A practical guide to finding a qualified, trustworthy heating engineer in London — from verifying Gas Safe registration to understanding fair pricing and avoiding common scams.
Boiler Installation in Chelsea: Navigating Period Properties, Listed Buildings and Conservation Areas
Expert guidance on boiler installation in Chelsea (SW3/SW10) — covering the unique challenges of Georgian townhouses, mansion blocks, conservation area restrictions, and working with freeholders.
Boiler Installation in Battersea: From Victorian Terraces to New-Build Towers
Your local guide to boiler installation in Battersea (SW11/SW8) — covering Victorian terrace upgrades, new-build heating decisions, district heating vs individual boilers, and why our Battersea HQ means faster service.
10 Warning Signs Your Boiler Needs Immediate Attention
Learn to identify the early warning signs of boiler problems before they become expensive emergencies. From strange noises to pressure drops, our expert engineers explain what to look for and when to call for help.