Boiler (make, model, output kW confirmed)
The main unit itself. Brand and model in writing, not “a modern efficient boiler.”
Often extra elsewhere: —
How we price things
What your quote includes — and what you won't see added on install day.
Most UK trade quotes are deliberately incomplete — enough line items to look comprehensive, missing enough extras to leave room for "surprises" on install day. Ours is the opposite. Here's everything in our standard quote, and everything that might genuinely change on the day.
Always included
The line items you don't need to ask about.
| Item | What it is | Often extra elsewhere |
|---|---|---|
| Boiler (make, model, output kW confirmed) | The main unit itself. Brand and model in writing, not “a modern efficient boiler.” | — |
| Manufacturer warranty registration | We submit the registration in your name directly to the manufacturer on install day. | Frequently not done — many customers discover years later their warranty was never registered |
| Magnetic system filter | Adey MagnaClean Professional 3 or Fernox TF1 Omega+ — catches metal particles that damage boilers. Adds 2–4 years of boiler life. | £150–£200 |
| Smart thermostat | Your choice of Hive, Nest, Honeywell Evohome, or Tado — includes install and setup. | £180–£250 |
| First annual service | Booked for Year 1 anniversary. Maintains your manufacturer warranty. | £90–£115 |
| Gas Safe certificate | Issued by our engineer, registered with Gas Safe Register automatically. You should always get this — verify every installer. | Should always be £0, but isn’t always provided |
| Old boiler removal and disposal | Environment Agency licensed waste carrier. Includes all packaging and old parts. No skip on your drive. | £60–£120 |
| Standard flue up to 2 metres | Covers ~90% of installs. Longer or more complex flues are discussed before install day. | Wall flue extensions £200–£500 |
| Power-flush if required by survey | Cleans the system of sludge and debris before connecting the new boiler. We include it standard because a new boiler on a dirty system voids warranties. | £250–£450 |
| 10-year parts and labour warranty (where manufacturer offers) | Worcester Bosch 4000/8000, Vaillant ecoTEC, Viessmann — 10 years. Some budget brands are shorter. | Manufacturer’s 5–7 year default elsewhere |
| Post-install commissioning report | Written document, emailed within 48 hours of install. Useful for insurance, future sale. | Rare |
| 2-week handover check-in call | Phone call from your engineer, not a call centre. | Rare |
Manufacturer warranty registration
We submit the registration in your name directly to the manufacturer on install day.
Often extra elsewhere: Frequently not done — many customers discover years later their warranty was never registered
Magnetic system filter
Adey MagnaClean Professional 3 or Fernox TF1 Omega+ — catches metal particles that damage boilers. Adds 2–4 years of boiler life.
Often extra elsewhere: £150–£200
Smart thermostat
Your choice of Hive, Nest, Honeywell Evohome, or Tado — includes install and setup.
Often extra elsewhere: £180–£250
First annual service
Booked for Year 1 anniversary. Maintains your manufacturer warranty.
Often extra elsewhere: £90–£115
Gas Safe certificate
Issued by our engineer, registered with Gas Safe Register automatically. You should always get this — verify every installer.
Often extra elsewhere: Should always be £0, but isn’t always provided
Old boiler removal and disposal
Environment Agency licensed waste carrier. Includes all packaging and old parts. No skip on your drive.
Often extra elsewhere: £60–£120
Standard flue up to 2 metres
Covers ~90% of installs. Longer or more complex flues are discussed before install day.
Often extra elsewhere: Wall flue extensions £200–£500
Power-flush if required by survey
Cleans the system of sludge and debris before connecting the new boiler. We include it standard because a new boiler on a dirty system voids warranties.
Often extra elsewhere: £250–£450
10-year parts and labour warranty (where manufacturer offers)
Worcester Bosch 4000/8000, Vaillant ecoTEC, Viessmann — 10 years. Some budget brands are shorter.
Often extra elsewhere: Manufacturer’s 5–7 year default elsewhere
Post-install commissioning report
Written document, emailed within 48 hours of install. Useful for insurance, future sale.
Often extra elsewhere: Rare
2-week handover check-in call
Phone call from your engineer, not a call centre.
Often extra elsewhere: Rare
Air source heat pumps
Full inclusions list for heat pumps — publishing shortly. Our standard heat-pump quote covers the outdoor unit, hot water cylinder, controls, pipework, commissioning, MCS certification, BUS application handled by us, and a 5–7 year manufacturer warranty on the unit.
Solar PV, battery & EV chargers
Full inclusions list for solar — publishing shortly. Our standard solar quote covers panels, inverter, battery (where specified), mounting, DC+AC cabling, G98/G99 commissioning, MCS certification, and a separate consumer-unit connection where needed.
Insulation (cavity, loft, IWI, EWI)
Full inclusions list for insulation — publishing shortly. Every insulation quote starts with a moisture-risk assessment and a borescope where relevant. The survey is itself the gate — if it fails, we don’t proceed.
Underfloor heating
Full inclusions list for underfloor heating — publishing shortly. Our standard wet-UFH quote covers the manifold, controls, screed, commissioning, and integration with your existing or new heat source.
Potential extras
Things we charge for only if they apply.
These are not hidden. They're written into your quote as "potential extras," with clear cost figures. If any of them apply, we tell you before any work starts. You can walk away with no cost.
| Potential extra | When it applies | Typical cost |
|---|---|---|
| Radiator upgrades | Only if survey finds 2+ existing rads undersized for your heat demand | £80–£180 per radiator |
| Pipework rerouting beyond 2m | Only for boiler relocations or significant plumbing changes | £200–£600 depending on scope |
| Asbestos remediation | Only if asbestos is present (relevant for pre-1999 builds) | £350–£1,200 |
| Complex roof flue scaffolding | Only for certain roof configurations (tall, complex geometry) | £200–£400 |
| Structural alterations | Only if chimney work or cavity alterations needed | Quoted per case |
| Gas supply upgrade | Only if existing supply is undersized (rare for replacement) | £400–£800 |
Radiator upgrades
Only if survey finds 2+ existing rads undersized for your heat demand
Typical cost: £80–£180 per radiator
Pipework rerouting beyond 2m
Only for boiler relocations or significant plumbing changes
Typical cost: £200–£600 depending on scope
Asbestos remediation
Only if asbestos is present (relevant for pre-1999 builds)
Typical cost: £350–£1,200
Complex roof flue scaffolding
Only for certain roof configurations (tall, complex geometry)
Typical cost: £200–£400
Structural alterations
Only if chimney work or cavity alterations needed
Typical cost: Quoted per case
Gas supply upgrade
Only if existing supply is undersized (rare for replacement)
Typical cost: £400–£800
All potential extras are surfaced before install day. The Instant Quote tool's five conditions are the hard commitment: if a survey finds one of these, we tell you before any work proceeds.
Air source heat pumps
Full not-included list for heat pumps — publishing shortly. Three named conditions can change a heat-pump quote: BUS grant ineligibility finding, structural issues with outdoor unit siting, electrical supply incapacity. The full list is on every heat-pump quote.
Solar PV, battery & EV chargers
Full not-included list for solar — publishing shortly. Two named conditions can change a solar quote: roof structural concerns found during fixing, DNO application delays for G99 grid connection. The full list is on every solar quote.
Insulation
Full not-included list for insulation — publishing shortly. The survey's moisture assessment is itself the gate; if it fails, we don't proceed. No surprise costs.
Underfloor heating
Full not-included list for underfloor heating — publishing shortly. One main condition can change a UFH quote: existing sub-floor or screed incompatibility requiring remedial work.
Your fixed price, protected
The five things that can change it.
Our fixed price holds unless one of five named conditions applies. They're listed in full on our Honest Total Price page — read them before you book. If any apply, we tell you before work starts and you decide whether to proceed.
Why this page exists
Because most installers won't do this.
If you've read ten installer websites to get here, you've probably seen zero that list exactly what's in and not in a quote to this level of detail. That's not an accident.
Incomplete quotes — "£2,800 for a new boiler!" — leave deliberate space for extras on install day. The extras may be legitimate or may not. By the time they show up, you've committed, the old boiler is out, and the pressure to agree is high.
We publish the full list because pre-empting that conversation makes the whole relationship saner. You know what might change. We know what might change. Nothing is discovered in a stressed hallway conversation at 3pm on install day.