Glow-worm boiler installs in Theydon Bois
Glow-worm boilers fitted, serviced and repaired across Theydon Bois. Glow-worm is part of the Vaillant group — strong shared parts availability and a solid budget option for landlord and rental installs. For full installs in Theydon Bois 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 Theydon Bois
Not a national chain — your local engineer, your local prices.
Glow-worm boilers fitted, serviced and repaired across Theydon Bois. Glow-worm is part of the Vaillant group — strong shared parts availability and a solid budget option for landlord and rental installs. For full installs in Theydon Bois we'll size the boiler against your real demand, not just like-for-like swap whatever's on the wall.
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 Theydon Bois
Period village stock with modern detached infill.
- Forest-edge conservation considerations
- Older system replacements
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.
Our approach to boiler installs in Theydon Bois
When you book us for boiler installations in Theydon Bois, you get a real, named engineer turning up — not a sub-contractor.
We know the housing in Theydon Bois and what tends to go wrong with it, which means fewer surprises mid-job.
Fixed prices in writing before any work starts. The number you agree is the number you pay.
What you get when you book us
- Family-run, no commission-driven sales
- Fixed written quotes — no surprise extras
- 5-star reviews on Google & Checkatrade
- Vaillant Advance approved
- Boiler registered for warranty on the day
Things Theydon Bois customers usually ask about boiler installs
Are Glow-worm and Vaillant the same?▾
Same parent group, often shared componentry, but Glow-worm sits at a lower price point with shorter warranties. Good value for rental properties.
Do you take the old boiler away?▾
Yes — old boiler, packaging and any redundant parts are removed and disposed of properly at no extra cost.
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.
Where else we work near Theydon Bois
Related services in Theydon Bois
Boiler repairs in Theydon Bois
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 Theydon Bois
Annual servicing keeps your boiler safe, efficient, and your manufacturer warranty valid. Full inspection, combustion analysis, and a written report.
Heating upgrades in Theydon Bois
Cold radiators, noisy systems, sky-high bills? Power flushes, smart thermostats, radiator swaps and full system upgrades that pay for themselves.
Plumbing in Theydon Bois
Everyday plumbing done properly — taps, toilets, leaks, washing machines, showers, outside taps and isolation valves.
At a glance
- Service
- New Boiler Installations
- Coverage
- Theydon Bois (CM16) 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 Theydon Bois
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 Theydon Bois customers find us for boiler installs
Same engineer, same fixed pricing — different question, different answer.
Glow-worm cover for Theydon Bois
Free written quote, no obligation. Real engineer, fixed price, fast response.