New Boiler Installation
An A-rated condensing boiler chosen for your actual home — surveyed and sized properly by Gas Safe registered engineers, then handed over flushed, filtered, commissioned and registered.
Getting it right
Sized from a survey, not a guess
The most common installation mistake isn't bad pipework — it's the wrong boiler. An oversized combi short-cycles and wastes gas; an undersized one leaves the second shower lukewarm. Before we quote, we look at what actually determines the right machine: how many people live in the home, how many bathrooms it has, the radiator load, and the incoming mains pressure and flow rate that decide whether a combi can genuinely deliver.
From that we recommend a type and output and give you a fixed quote that covers the whole job — flushing, filtration, controls, commissioning and paperwork included, with no extras invented on installation day.
The unglamorous parts matter most. A thorough system flush and a magnetic filter keep the sludge of the old system out of the new heat exchanger — which is precisely the condition most manufacturers attach to their longest warranties.
Every installation includes
- Full site survey and correct sizing for heat and hot water
- System flush plus a magnetic filter to protect the new boiler
- Smart or programmable controls, fitted and explained
- Commissioning with a completed Benchmark record
- Building Regulations notification and certificate
- Manufacturer warranty registered in your name
Choosing a type
Combi, system or heat-only?
| Type | How it works | Best suited to |
|---|---|---|
| Combi | Heats hot water instantly on demand — no cylinder, no loft tanks | Homes with one bathroom (or two with strong mains pressure) and limited space |
| System | Stores hot water in a cylinder fed directly from the mains | Larger households with two or more bathrooms where showers run at the same time |
| Heat-only (regular) | Works with a cylinder and loft tanks on an open-vented system | Older properties keeping their existing tanks, or homes where mains pressure is poor |
Conversions between types — most often heat-only to combi — are perfectly possible; they simply involve more pipework, so the quote spells out exactly what's included. If you're unsure which way to go, we'll give you the reasoning as well as the recommendation.
Boiler Plus: since 2018, every new combi installation in England must have time and temperature controls plus at least one of: weather compensation, load compensation, flue gas heat recovery, or a smart thermostat with automation and optimisation. We build compliance into the specification rather than treating it as an optional extra.
Why replace
What a new boiler actually changes
An old non-condensing boiler sends a substantial share of the heat it generates straight out of the flue. A modern condensing model recovers that heat from the flue gases and puts it into your radiators instead — which is why replacing a boiler that's fifteen or more years old cuts gas use significantly, before you even factor in better controls and thermostatic radiator valves.
For landlords there's a second dividend: heating system efficiency is one of the bigger levers on a domestic EPC, so an upgrade can lift a rating that's drifting towards the MEES minimum of band E. If that's part of your plan, book the new EPC after the installation so the certificate captures the improvement.
Once the new boiler is in, two habits protect the investment. The first is the annual boiler service, which those long manufacturer warranties depend on. The second is making sure the rest of the system keeps up — balancing the radiators after installation so every room heats evenly, and fitting TRVs where rooms are heated that needn't be.
Ready for numbers? Send photos of the current boiler and its location through the quote form, or browse the full range of boiler services first.
Common questions
Boiler installation questions, answered
How much does a new boiler installation cost?
It depends on the boiler type and output, whether it's a like-for-like swap or a conversion, and where the flue and pipework need to go. Send us a few photos of the current boiler and its location via WhatsApp or the quote form and we'll reply with a fixed quote, usually the same working day.
How long does a boiler installation take?
A straightforward like-for-like combi swap is usually completed in a day. A conversion — say from a heat-only boiler with loft tanks to a combi — generally takes two to three days, because pipework changes and removal of the old cylinder and tanks are involved. Your quote will say which applies.
Which boiler type do I need — combi, system or heat-only?
Broadly: combis suit homes with one bathroom and decent mains pressure; system boilers suit larger homes where two or more showers run at once; heat-only boilers suit older properties with existing tanks or weak mains pressure. The survey settles it properly — occupants, bathrooms and measured mains flow rate, not guesswork.
What paperwork should I get with a new boiler?
A completed Benchmark commissioning record, the Building Regulations compliance certificate confirming the installation was notified, and confirmation that the manufacturer warranty has been registered in your name. Keep them together — you'll want all three when selling, letting or claiming.
Will a new boiler improve my EPC rating?
Usually, yes — the efficiency of the heating system is one of the larger factors in a domestic EPC, so replacing an old non-condensing boiler with an A-rated model and modern controls typically lifts the score. That matters for landlords keeping rentals at band E or above under MEES. Book the new EPC after the installation so the certificate reflects the upgrade.