Worcester Bosch, The UK's Most Trusted Name in Heating
- A-rated, bills drop from day one
- Hydrogen-blend ready, built for the future
- Compact fit, no disruption to your home
- Up to 10-year warranty, in writing, guaranteed
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New Boiler Installation & Fitted Next-Day inChelmsford
The only boiler installer in Chelmsford offering a Free Smart Thermostat, £250 Old-for-New Cashback, a 5-year workmanship warranty, and a fixed price that never changes, from the first call to the final sign-off.
5-Year Warranty
0% Finance
2 Year Servicing
Gas Safe
Best Deals
170+ Five-Star Google Reviews Across Chelmsford & Essex. 20 Years Heating Essex Homes
The most reviewed boiler installer in Essex trusted by homeowners and landlords across Chelmsford for over two decades.
Why Choose "Just Boilers"?
Most installers fit a boiler and disappear. We stay with you back in writing, guaranteed from day one.
"Just Boilers"
Other Local Installers
Price
Fixed price locked in from the first call. What we quote is exactly what you pay.
Most give estimates. The final invoice often tells a different story.
Warranty
5-year workmanship warranty backed in writing. Up to 12 years manufacturer warranty.
1-2 years if you're lucky. Nothing in writing.
Finance
0% finance over 1-3 years. No hidden fees. No surprises.
Upfront payment expected. Limited options.
Free Extras
Free Smart Thermostat + £250 Old-for-New Cashback. Every install.
Charged separately. Usually not offered at all.
Aftercare
2 years free servicing included. We don't vanish after the install.
Most move on to the next job. Follow-up is rarely guaranteed.
Certifications
Gas Safe. F Gas. MCS. IPHE. LPG. Unvented Certified.
Standards vary. Subcontractors are common.
Experience
20+ years. 170+ five-star reviews. Essex's most trusted heating team.
Newer. Less proven. Fewer reviews.
Response
24/7 emergency cover. We pick up the phone when it matters most.
Office hours. Voicemail. Call back when convenient for them.
No other boiler installer in Chelmsford offers this as a complete package.
This isn't a special deal. It's just the way we've always done things.
Choose the Boiler That's Right for Your Home
Fixed pricing. Premium brands. Gas Safe certified installation installed as fast as next day.
Vaillant, Europe's #1 Heating Brand
- German-engineered, outlasts everything else
- Whisper-quiet, you'll feel it, never hear it
- Instant hot water, no waiting, ever
- Up to 12-year warranty, our longest available
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Ideal Boilers, Proudly Made in the UK
- Dead simple controls, no manual needed
- Frost-protected, every British winter, no fuss
- Honest value, quality without the premium price
- Built-in diagnostics, catches problems early
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Glow-worm, Nearly 100 Years of British Expertise
- Ultra-compact, perfect for tighter spaces
- Low emissions, easier on the environment
- High efficiency, lower bills, lower footprint
- Built to last, a century of proof behind it
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NOT SURE WHICH IS RIGHT FOR YOU?
We'll recommend the perfect boiler based on your property size, heating demand, and budget simple, honest advice with no pressure.
Old Boiler Is Costing You More Than You Think
You're Paying Hundreds More Every Winter
Old boilers waste up to 35% more energy than a modern A-rated system. That's not wear and tear that's money leaving your pocket every single month for a boiler that's already past its best.
Breakdowns Don't Give You Warning
Boilers over 10 years old don't send a warning. They just stop usually at 11pm in January, with the kids in the house. One call to Just Boilers now is worth a hundred emergency callouts later.
Repairs Are Adding Up Faster Than You Realise
That £200 fix last spring. The £150 callout before Christmas. At some point you stop repairing an old boiler and start funding its replacement anyway just slowly and painfully.
An Ageing Boiler Is A Safety Risk
Carbon monoxide leaks. Pressure faults. Non-compliant ventilation. These aren't rare; they're what happens when an old system is pushed past its limit. Your family deserves better than that risk.
Installation Slots Fill Fast
Every week you wait is a week closer to the rush. Essex engineers get booked out fast when the temperature drops. The families who act now are the ones who aren't left waiting in the cold.
Get Your Fixed Price Quote Today
No hidden costs. No pushy sales. Just honest advice from local experts.
See the Standard We Set Every Single Install
Still on the fence? Take a look at what we leave behind and what we never leave behind is a mess.
Every boiler installation across Chelmsford and Essex is completed to one standard. Ours. Clean, precise, and built to last Just a warm home and a job done properly.
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Tidy Installs, Every Time
Matched to Your Property
Clear Handover
Gas Safe Certified
The Team Behind Your Warm Home
Three engineers. One shared standard. And a rule we've never once broken we don't send anyone to your home that we wouldn't trust on our own.
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John
Lead Engineer
John's been at this for 18 years. He's the kind of engineer who notices the small things, the awkward pipe run, the slightly off pressure, the thing nobody else would bother mentioning. He'll point it out anyway. Not to upsell you. Just because that's how he works.
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Dave
Senior Engineer
25 years in and Dave still turns up like it's his first day. Quietly gets on with it. Leave the place tidy. Explains everything in plain English before he goes. Outside of work he's training for Ironman competitions, which tells you everything you need to know about how seriously he takes the things he commits to.
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Dan
Apprentice Engineer
Dan's 23, from Billericay, and absolutely determined to be brilliant at this. He came to us to learn the trade properly, not just the technical side, but the bit that actually matters: treating people's homes with respect. He's getting there faster than most.
Every apprentice at Just Boilers goes through intensive hands-on training across gas, plumbing, and heating plus full customer service coaching. Because how we treat your home matters just as much as how we fix it.
Real Homeowners. Real Results. Real Trust.
Don't just take our word for it, here's what homeowners are saying about 'Just Boiler'.
Rated 5.0 on Google
"We are absolutely over the moon with our new boiler installation! John, Dave, Dan, and the entire team were professional, efficient, and incredibly knowledgeable. They took the time to explain everything to us and made sure we were completely satisfied before they left. Can't recommend Just Boiler enough!"
Hannah R.
Chelmsford, Essex
Full System Installation
"We are absolutely over the moon with our new boiler installation! John, Dave, Dan, and the entire team were professional, efficient, and incredibly knowledgeable. They took the time to explain everything to us and made sure we were completely satisfied before they left. Can't recommend Just Boiler enough!"
Hannah R.
Chelmsford, Essex
Full System Installation
"I can't believe the difference! We went from a 50+ year old system to a brand new Combi Boiler and a main upgrade—the team handled everything with such care and professionalism. John and his crew were brilliant! Highly recommend if you're looking for a reliable, honest service."
Peter H.
Essex
Boiler Replacement & Gas Upgrade
"John came out on a Sunday to service my boiler—super professional, very friendly, and clearly knows his stuff. He even gave me helpful tips to keep my system running smoothly. I've already recommended him to friends and family. Great service!"
MBC
Local Guide, Essex
Boiler Service
"I seriously can't praise John and his team enough. They were clean, reliable, and totally professional from start to finish. The installation was seamless, and they made sure everything was working perfectly before they packed up. A truly excellent service."
Joann W.
Essex
Boiler Installation
"We had a full boiler replacement and couldn't be happier with the service we received. The team was punctual, polite, and extremely capable. Everything was done to a very high standard—thoroughly recommend!"
Klaudia
Essex
Full Boiler Replacement
"We are absolutely over the moon with our new boiler installation! John, Dave, Dan, and the entire team were professional, efficient, and incredibly knowledgeable. They took the time to explain everything to us and made sure we were completely satisfied before they left. Can't recommend Just Boiler enough!"
Hannah R.
Chelmsford, Essex
Full System Installation
"I can't believe the difference! We went from a 50+ year old system to a brand new Combi Boiler and a main upgrade—the team handled everything with such care and professionalism. John and his crew were brilliant! Highly recommend if you're looking for a reliable, honest service."
Peter H.
Essex
Boiler Replacement & Gas Upgrade
"John came out on a Sunday to service my boiler—super professional, very friendly, and clearly knows his stuff. He even gave me helpful tips to keep my system running smoothly. I've already recommended him to friends and family. Great service!"
MBC
Local Guide, Essex
Boiler Service
"I seriously can't praise John and his team enough. They were clean, reliable, and totally professional from start to finish. The installation was seamless, and they made sure everything was working perfectly before they packed up. A truly excellent service."
Joann W.
Essex
Boiler Installation
"We had a full boiler replacement and couldn't be happier with the service we received. The team was punctual, polite, and extremely capable. Everything was done to a very high standard—thoroughly recommend!"
Klaudia
Essex
Full Boiler Replacement
Common Questions, Clear Answers
Everything You Need to Know
Most new boiler installations with Just Boilers start from £2,000. The final price depends on your property size, the boiler you choose, and any additional work required. What never changes is this, the price we quote on day one is the price you pay on completion. No surprises. Ever.
If your boiler is over 10 years old, breaking down regularly, making unusual noises, or your energy bills keep climbing for no obvious reason, it's telling you something. An aging boiler doesn't get better with time. It gets more expensive. Call us and we'll give you an honest assessment, not a sales pitch.
In most cases, we can have your new boiler installed within 24 to 48 hours of your survey. We know how disruptive it is to be without heating or hot water, so we move quickly, without cutting corners.
There's no single answer, and anyone who tells you otherwise isn't being straight with you. The right boiler depends on your property size, hot water demand, and budget. We'll assess your home properly and recommend exactly what you need. Worcester Bosch, Vaillant, Ideal, and Glow-worm are all brands we trust and install daily across Essex.
Size is about output, not the physical unit. A boiler that's too small will struggle. One that's too large will waste energy. We size every boiler to your property, number of rooms, radiators, bathrooms, and how you actually use your heating. Get it right once and you won't think about it again.
Yes. Just Boilers offers 0% finance over 1 to 3 years, meaning you can get a brand-new A-rated boiler installed without paying everything upfront. Interest-bearing options are also available up to 3 years for larger systems. All finance is subject to status and credit checks.
Every Just Boilers engineer is Gas Safe registered, the legal requirement to work on gas appliances in the UK. Beyond that, our team holds F Gas, MCS, IPHE, LPG, and Unvented certifications. We don't send anyone to your home who isn't fully qualified, full stop.
An A-rated boiler converts at least 90% of its fuel into usable heat, compared to older G-rated systems that waste up to 35%. In practical terms, a warmer home, lower energy bills, and a smaller carbon footprint from the very first day it runs.
The UK government is moving toward hydrogen-blended gas as part of its net zero strategy. Hydrogen-blend ready boilers, like Worcester Bosch and Vaillant, are engineered to run on this future fuel mix without needing replacement. It's future-proofing your home today.
For the right home, absolutely. Heat pumps are highly efficient, environmentally friendly, and increasingly cost-effective, particularly in well-insulated properties. Just Boilers installs heat pump systems across Essex and can assess whether your home is suitable. If it is, we'll tell you. If it isn't, we'll tell you that too. Either way, you'll get the truth.
Still have questions? We're here to help!
Speak With Our Team
We're local, we're qualified, and we actually pick up the phone.
Sales & Enquiries: Monday – Friday, 8am – 6pm | Saturday, 9am – 5pm
24/7 Emergency Support
Fast Installations
Fixed Prices — Always
Gas Safe Certified Engineers