Service
Gas Safe boiler replacements and complete first-time central heating installations. Warm rooms, quiet systems, honest fixed pricing.
Why this matters
An ageing boiler costs money quietly: through reduced efficiency, poor radiator balance, and the constant threat of a winter breakdown. Or you may be in a property without central heating at all, relying on electric heaters and rising winter bills. Either way, the right upgrade transforms daily comfort. Done well, it is a fifteen-year investment. Done badly, it is a source of problems from day one.
What you get
A correctly sized, high-efficiency boiler matched to your home's actual heat demand
Heating that responds quickly and evenly: no more cold spots and constant thermostat fiddling
Gas Safe install, manufacturer warranty registered the same day, tidy pipework throughout
For first-time central heating: a complete system designed for the property, with radiators, pipework, boiler and controls
Our approach
We assess the whole system, not just the box on the wall. Existing pipework condition, radiator sizing, flue routing, water pressure, and the controls you actually want to use, all checked before we recommend a specific boiler.
Gas Safe registered, personally certified for the gas work they do. Company registration 921521, verifiable on the Gas Safe Register.
Oversized boilers cycle constantly, wearing out faster and wasting gas. We size based on actual room-by-room heat loss, not square-footage rules of thumb.
Hive, Nest, or Tado as standard, properly configured at install so you actually use the features you paid for.
We magnetic-check every existing system before we replace a boiler. Power-flush where it will make a real difference, not as a default upsell.
A five-minute call to understand your current setup, what is going wrong, and whether a survey is worth booking. Sometimes the answer is a repair or a service, not a replacement.
A Gas Safe engineer visits, checks the existing system, tests pressure and flow, reviews flue options, and asks what controls you actually want. Typically an hour on site.
Within two working days: boiler model, flue kit, thermostat, any system upgrades (magnetic filter, power-flush, radiator valves), and the total fixed price. Warranty terms explained in plain English.
One to two days for a straight swap, three to five days for first-time central heating. Dust sheets throughout, Gas Safe certificate issued on completion, manufacturer warranty registered before we leave.
Walk-through of every control, first-year service included as standard, and a named contact for any question afterwards. Servicing reminders sent annually.
Our signature honesty
If your property would be genuinely better served by a heat pump (good fabric, decent emitters, clear outside space), we’ll say so, and we’ll walk you through the BUS-grant route honestly. If the existing pipework is badly undersized and a new boiler would just mask the underlying problem, we’ll scope the remedial pipework into the quote, not shrug. And if a power-flush alone would probably fix what’s wrong, we’ll tell you that before selling you a new boiler. An unnecessary install is a more expensive service call than the honest one.
Worcester Bosch, Vaillant, and Viessmann partners, giving you access to extended warranties not available through online-quote installers.
Modern condensing boilers recover heat from flue gases. But efficiency depends on flow temperature and controls. We commission yours to actually achieve its rated figures.
Thermostat paired, zones configured, schedules set up with you, not just left for you to figure out from the app.
If your boiler has another five good years in it, we will tell you. We do not earn commission from selling boilers you do not need.
For this service specifically, we operate under the following industry accreditations. Each one has passed audit and is verifiable with the issuing body.
Age (over fifteen years), reliability (more than one breakdown per winter), efficiency (SEDBUK below 85%), parts availability, and safety (any amber or red flags on service) are the key factors. We will never recommend replacement over repair when repair is the better long-term value.
Combi boilers suit smaller homes with one bathroom. System boilers with a cylinder suit larger homes or properties with high simultaneous hot water demand (two showers running, for example). Regular (heat-only) boilers suit older properties with existing cold water tanks and gravity-fed systems. We design around your actual hot water demand, not a default.
For a typical three-bed house with no existing pipework, a full first-time central heating installation (boiler, pipework, radiators, thermostat, flue) is usually in the £5,500–£8,500 range depending on property size and complexity. We provide a fixed price at survey. No subsequent surprises.
Only if your system is actually contaminated, which we check with a magnetic filter during survey. Power-flushing a clean system is a waste of your money. We flush where it is warranted and fit a magnetic filter as standard on every install to protect the new boiler going forward.
Yes. We offer 24 or 36 month 0% finance on installations over £1,500, subject to credit check. The finance provider is a regulated UK lender and the process is entirely online. No early repayment penalties.
For most homes with a reasonable EPC and some insulation, yes. A heat pump is the lower-cost, lower-carbon choice in the medium term, and the £7,500 BUS grant makes the upfront gap smaller than you might expect. We will tell you honestly whether your property suits one before taking a boiler order. See our heat pump page for details.
Book a free survey. A qualified engineer will visit, assess your property honestly, and send a written recommendation within five working days. No obligation.
What does this cost?
£2,485–£3,570
for a typical 3-bed family home. Includes the boiler, magnetic filter, smart thermostat (Hive/Nest/Honeywell, your choice), first year's service, up to 10-year manufacturer warranty registered in your name, old-boiler removal, and a standard flue up to 2 metres.
| What moves the price up | What holds it at base | What brings it down |
|---|---|---|
| Premium SKU, e.g. Worcester Bosch Greenstar 8000 Plus (+£1,085 over the mid-tier) | Mid-tier: Worcester Bosch Greenstar 4000 (our bestseller at £2,485) | Budget tier starts at £2,400 if your home needs the lower output |
| Roof flue instead of wall flue (+£395) | Standard horizontal wall flue ≤2m. This is the baseline | n/a |
| Boiler relocation within same room (+£450) or different room (+£750) | Boiler stays in its current position | n/a |
| Floor-standing existing unit → new wall-mounted install (+£245) | Existing wall-mounted unit, same position | n/a |
Premium SKU, e.g. Worcester Bosch Greenstar 8000 Plus (+£1,085 over the mid-tier)
Mid-tier: Worcester Bosch Greenstar 4000 (our bestseller at £2,485)
Budget tier starts at £2,400 if your home needs the lower output
Roof flue instead of wall flue (+£395)
Standard horizontal wall flue ≤2m. This is the baseline
n/a
Boiler relocation within same room (+£450) or different room (+£750)
Boiler stays in its current position
n/a
Floor-standing existing unit → new wall-mounted install (+£245)
Existing wall-mounted unit, same position
n/a
A free survey is how we turn this range into a fixed price. We'll never ask you to commit before the written plan is in your hands.
Prices last updated: 25 April 2026. We update quarterly.
The full picture
| Cost component | Smart Energie | Online Installer A | Online Installer B | National Provider |
|---|---|---|---|---|
| Boiler install (headline) | £2,485 | £3,100 | £2,800 | £4,800 |
| Magnetic filter (industry standard, often charged extra) | Included | £180 | £150 | £200 |
| Smart thermostat (Hive/Nest/Honeywell) | Included | £200 | £180 | Included |
| First annual service (Year 1) | Included | £95 | £90 | £115 |
| Old boiler removal and disposal | Included | £80 | £60 | Included |
| Flue complexity: up to 2m standard wall | Included | £120 | £90 | Included |
| Warranty years included (manufacturer) | 10 years | 7–10 | 5–10 | 10 years |
| Years 2–10 annual service (9 × £95 avg) | £855 | £855 | £810 | £1,035 |
| 10-year TCO (install + consumables + service) | £3,340 | £4,630 | £4,090 | £6,150 |
| Probability of costly mid-term rework1 | Low (own engineer on call) | Medium (subcontractor network) | Medium (online-first model) | Low |
1 Anonymised survey of 200 post-install repair cases UK-wide, 2024–2025. Not exhaustive. Indicative only.
1 Anonymised survey of 200 post-install repair cases UK-wide, 2024–2025. Not exhaustive. Indicative only.
If you're optimising for the lowest possible 10-year cost on a gas combi and your property is simple, an online-first installer may be the right choice. What they won't give you is the same-engineer accountability if something goes wrong in year three, or a written survey before install, or any meaningful advice if a heat pump would have been a better decision. If those things don't matter to you, we're not your best choice. If they do, we are.
When we'd tell you no
Most boiler installs are straightforward. A few aren't. We've learned that when the maths doesn't work, nothing compensates for fitting the wrong kit in the wrong home.
We'd usually advise against a new gas boiler when:
In every case, if we say no to your first ask, we'll say yes to the right alternative.