Glow-worm boiler installs in South Street
Glow-worm boilers fitted, serviced and repaired across South Street. 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 South Street 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 South Street
Not a national chain — your local engineer, your local prices.
Glow-worm boilers fitted, serviced and repaired across South Street. 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 South Street 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 South Street
Three things Bishop's Stortford 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.
Hard water in CM23 means we strongly recommend a magnetic filter and limescale inhibitor on every install — heat exchanger failures from scale are common after 4–5 years without one.
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 South Street
Older central Stortford street with period properties and conservation considerations.
Strong mix — Victorian terraces in the old centre, post-war housing in Thorley, and large new-build estates expanding north.
- New-build combi boilers approaching first major service interval
- Victorian terrace flue routing constraints
- Hard water from the chalk aquifer accelerates scale build-up in heat exchangers
What you get when you book us
- Family-run, no commission-driven sales
- Old boiler removed and disposed of properly
- Boiler registered for warranty on the day
- Gas Safe registered (reg. number on every quote)
- 5-star reviews on Google & Checkatrade
From first call to handover — our boiler installs routine
Site visit
We measure up, check radiator output, and confirm the gas pipe size is right — undersized supply pipes are the most common reason boilers underperform after install.
Quote & options
Two or three boiler options at different price points so you can pick what fits your budget.
Install
Old boiler removed, new one fitted, system flushed, controls set up. Usually a single day for a straight swap, two for a full system change.
Aftercare
Annual service reminders, plus a real human at the end of the phone if anything plays up.
Things South Street 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.
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 South Street
Boiler repairs in South Street
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 South Street
Annual servicing keeps your boiler safe, efficient, and your manufacturer warranty valid. Full inspection, combustion analysis, and a written report.
Heating upgrades in South Street
Cold radiators, noisy systems, sky-high bills? Power flushes, smart thermostats, radiator swaps and full system upgrades that pay for themselves.
Plumbing in South Street
Everyday plumbing done properly — taps, toilets, leaks, washing machines, showers, outside taps and isolation valves.
At a glance
- Service
- New Boiler Installations
- Coverage
- Bishop's Stortford (CM22, CM23, CM24) and surrounding areas
- Response time
- Same-day where possible
- Credentials
- Gas Safe registered, fully insured, 12-month workmanship guarantee
- Pricing
- Fixed written quotes, no surprise extras
Roughly what you'll pay in South Street
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 South Street customers find us for boiler installs
Same engineer, same fixed pricing — different question, different answer.
Villages near South Street we also cover
Glow-worm cover for South Street
Free written quote, no obligation. Real engineer, fixed price, fast response.