Vaillant boiler installs in Chelmsford
Vaillant Advance approved installers covering Chelmsford. We fit the ecoTEC Plus and ecoFIT pure ranges with extended warranties, and we know the common Vaillant fault codes (F22, F75, F28) by heart for repair work. For full installs in Chelmsford we'll size the boiler against your real demand, not just like-for-like swap whatever's on the wall.
You're not getting a call centre — you're getting Grant.
The same engineer quotes the job, does the work, and answers the phone afterwards if anything's not right.
Gas Safe Registered
Every gas job legally signed off
18+ years on the tools
Grant has been fixing boilers in Harlow since before smart thermostats existed.
Real human on the phone
Most calls answered the same day, often within the hour.
Locally based in Chelmsford
Not a national chain — your local engineer, your local prices.
Vaillant Advance approved installers covering Chelmsford. We fit the ecoTEC Plus and ecoFIT pure ranges with extended warranties, and we know the common Vaillant fault codes (F22, F75, F28) by heart for repair work. For full installs in Chelmsford we'll size the boiler against your real demand, not just like-for-like swap whatever's on the wall.
Why we're a sensible choice for boiler installs in Chelmsford
Three things Chelmsford customers tell us they value: we turn up when we say we will, we explain things in plain English, and we don't try to sell you anything you don't need.
For boiler installations specifically, that means honest advice on whether to repair, replace, or upgrade — not a default sales pitch.
Everything we do is Gas Safe registered, fully insured, and backed by a 12-month workmanship guarantee.
What's included
Combi Boiler Installation
Single-unit installs for most 1–3 bathroom homes — no tank needed.
Learn moreSystem Boiler Installation
For larger homes with multiple bathrooms and high hot water demand.
Learn moreRegular (Heat-Only) Boiler Replacement
Like-for-like swaps for older conventional systems with tank and cylinder.
Learn moreBack Boiler Replacement
Removing fireplace back boilers and replacing with modern combi or system units.
Learn moreAbout Chelmsford
Full mix from Victorian to modern; heavy modern estate development on the outskirts.
- Hard-water scale management
- Modern estate combi servicing
What you get when you book us
- Old boiler removed and disposed of properly
- Fixed written quotes — no surprise extras
- Vaillant Advance approved
- 5-star reviews on Google & Checkatrade
- Family-run, no commission-driven sales
Our boiler installs process, step by step
Free home survey
We come out, look at your existing system, mains pressure and gas supply, and recommend the right boiler for your property — no pressure, no commission-driven upsells.
Written fixed quote
You get a clear written quote covering the boiler, parts, labour and warranty. No surprise add-ons mid-job.
Installation day
Most straight swaps are done in a single day. We protect floors, work tidily, and leave the area as clean as we found it.
Commissioning & handover
Boiler is benchmarked, registered for warranty in your name, and we walk you through the controls before we leave.
Common questions about boiler installs in Chelmsford
Why pick Vaillant over Worcester?▾
Vaillant tends to edge ahead on hot-water performance and very-quiet operation. Worcester edges ahead on warranty length and parts availability outside London. We'll be honest about which fits your situation.
Do you stock Vaillant parts?▾
Common parts (PRVs, expansion vessels, F22 sensors) yes — on the van. Less common parts come next-day from Vaillant directly.
How long does a boiler install take?▾
A straight combi swap is usually one day. A boiler relocation, conversion, or full system change is typically 1–3 days.
How much does a new boiler cost fitted?▾
Most combi swaps run £2,200–£3,800 fitted depending on brand and any system upgrades. We give you a written fixed price after a free survey — no obligation.
What else we can help with in Chelmsford
Boiler repairs in Chelmsford
No heating or hot water? We respond fast — usually same day — diagnose properly, and give you a fixed price before any work starts.
Boiler servicing in Chelmsford
Annual servicing keeps your boiler safe, efficient, and your manufacturer warranty valid. Full inspection, combustion analysis, and a written report.
Heating upgrades in Chelmsford
Cold radiators, noisy systems, sky-high bills? Power flushes, smart thermostats, radiator swaps and full system upgrades that pay for themselves.
Plumbing in Chelmsford
Everyday plumbing done properly — taps, toilets, leaks, washing machines, showers, outside taps and isolation valves.
Other places we work close to Chelmsford
At a glance
- Service
- New Boiler Installations
- Coverage
- Chelmsford (CM1, CM2, CM3) and surrounding areas
- Response time
- Usually within 24–48 hours
- Credentials
- Gas Safe registered, fully insured, 12-month workmanship guarantee
- Pricing
- Fixed written quotes, no surprise extras
Roughly what you'll pay in Chelmsford
These are honest starting prices for jobs we do every week. Final quote depends on your property — we'll always confirm in writing before any work starts. No surprise add-ons.
| Job | Price |
|---|---|
Combi-to-combi swap (like-for-like) incl. magnetic filter, system flush, 2-yr labour warranty | from £1,950 |
Conventional → combi conversion tank removal, full pipework reconfiguration | from £2,800 |
System boiler with new cylinder for 3+ bedroom / 2-bathroom homes | from £3,400 |
Free home survey & fixed quote no commission-driven upsells | £0 |
Prices include VAT. Parts quoted separately and shown on your written quote.
Other ways Chelmsford customers find us for boiler installs
Same engineer, same fixed pricing — different question, different answer.
Vaillant specialists for Chelmsford
Free written quote, no obligation. Real engineer, fixed price, fast response.