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Gas Boiler Installation

Reliable heating at a fair price

We look at your home, recommend the right boiler, and fit it within days. Gas Safe registered engineers, fixed pricing, and a 2-year workmanship warranty on every install.

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Ideal Logic 2, Worcester Bosch Greenstar 8000 and Greenstar 4000 boilers with up to 10 year warranty
Our customers say Excellent 4.8 out of 5 based on 1,570 reviews
Our Range

Which boiler should we recommend for your home?

Both brands we fit are A-rated and hydrogen-ready, with strong UK service networks. Here is what each one is best at.

Slide 2 of 5: Worcester Bosch Greenstar 8000 Life (black)

Worcester Bosch Greenstar 4000 combi boiler, white casing
Worcester Bosch Greenstar 8000 Life boiler, black front panel
Worcester Bosch Greenstar 8000 Life boiler, white casing
Worcester Bosch Greenstar wall-mounted heat-only boiler, white casing
Worcester Bosch Greenstar wall-mounted heat-only boiler, white casing

Why Worcester Bosch?

Decades of reliable service in British homes, with strong UK support.

  • Built reliably enough to stay common in British homes for decades
  • Quiet enough for open-plan rooms
  • A-rated efficiency keeps running costs down
  • Greenstar 4000 and 8000+ cover standard combi swaps up to high-demand properties
  • Works with Bosch EasyControl and most smart heating systems
  • Hydrogen-blend ready (up to 20%) for changes to the gas grid
  • Up to 10-year warranty with a strong UK service network
Best suited for

Homeowners who want quiet, well-built kit with solid UK support.

Slide 2 of 3: Ideal Logic Max heat-only

Ideal Logic 2 Combi C30 wall-mounted gas boiler, white casing
Ideal Logic Max heat-only boiler, white front panel and controls
Ideal Vogue C40 wall-mounted boiler, minimalist white finish

Why Ideal Heating?

Efficient heating built around real UK homes.

  • Solid performance without paying premium prices
  • Models from the compact Logic 2 combi up to the higher-output Vogue range
  • A-rated across the range, so bills stay lower
  • Simple controls for homeowners, familiar layouts for engineers
  • Parts widely stocked across the UK, so service calls are quick
  • Hydrogen-blend ready (up to 20%) for future fuel changes
  • Up to 10-year warranty on selected models
Best suited for

Homeowners who want efficient heating and solid value without fuss.

Not sure which boiler is right for your home?

Answer a few quick questions and we will recommend the right boiler for your property.

Get a boiler recommendation
EU energy label for Worcester Bosch Greenstar 8000+, A-rated for space heating and hot water

Why efficiency matters

How much can a new boiler save you?

An older boiler wastes up to 40% of the gas you pay for. A new A-rated model uses over 90%, so your bills drop straight away. The Energy Saving Trust estimates you could save around £420 a year in Great Britain by upgrading from a G-rated boiler to an A-rated boiler with full heating controls. Figures based on December 2025 energy prices.

Save up to £0/year Energy Saving Trust estimate for GB (G to A-rated with full heating controls, December 2025 prices)
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Which type

Which boiler type suits your home: combi or heat-only?

Both are Boiler Plus-compliant condensing models. The question is whether you want hot water on demand or a stored cylinder.

  Combi Heat-only (regular)
Best for 1 to 2 bathrooms with good mains pressure Larger homes, low mains pressure, or where the existing cylinder and tank stay
Hot water On demand, no cylinder Stored cylinder with cold-water tank in the loft
Output range 24 to 35 kW typical, up to 50 kW on high-flow combis 12 to 24 kW typical
Multiple showers at once Drops flow rate Steady flow until the cylinder runs out
Space needed Single wall-mounted unit; no cylinder or tank Boiler, hot water cylinder, and cold-water tank in the loft
Installation time on site About 1 day for a like-for-like swap; 1 to 2 days if you are converting from a regular setup (tank removal and extra pipework) About 1 day for a like-for-like swap; longer if the cylinder or pipework needs work
Brands fitted Worcester Bosch Greenstar 4000 & 8000 Life, Ideal Logic 2, Ideal Vogue C40 Worcester Bosch Greenstar heat-only (15 & 24 kW), Ideal Logic Max heat-only

Not sure which type you have, or which is right for your property? Answer a few questions about your home in our quote and we will recommend the best-matching boiler for your needs.

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Your Installation

What is included in your boiler installation price?

Need it now?

No hot water, boiler cutting out, strange noises? We can go from quote to a fitted boiler in 3 to 5 days. You don't need to know what type you have; we work that out from a few photos.

Planning ahead?

If your boiler is 10 to 15 years old, it's losing efficiency every winter. Replacing it before it fails means no emergency, lower bills, and a warranty that starts while everything still works.

  • A-rated boiler from Worcester Bosch or Ideal Heating Matched to your home size and hot water demand
  • Gas Safe registered installation Notified to your local authority on completion
  • Full system power flush and magnetic filter Clears sludge and protects the new boiler from day one
  • Flue, pipework, and all fittings Nothing left off the quote for you to source separately
  • Manufacturer warranty up to 10 years Plus our own 2-year workmanship guarantee, double the industry standard
  • Old boiler removed and disposed of Taken away on the day, nothing for you to arrange
Gas Safe engineer fitting a Worcester Bosch wall-mounted boiler in a modern UK kitchen

Most installs come in between £1,600 and £4,500, depending on the boiler and the work involved. You will see a full breakdown before you commit to anything. Get a quote for your home

How It Works

How do we install your new boiler?

No home visit needed for most installations. From quote to a fitted boiler in around 3-5 days, all carried out by a Gas Safe registered engineer.

  1. 01

    What do we need to know about your home?

    Tell us about your property, your current boiler, and upload a few photos. Takes a couple of minutes; no home visit needed for most jobs.

  2. 02

    What is the all-in price?

    You will see your fixed price straight away, matched to the right boiler for your home and including flue, power flush, magnetic filter, Gas Safe registration, and warranty. No obligation.

  3. 03

    Who fits the boiler, and how?

    A Gas Safe registered engineer installs your boiler, power-flushes the system, fits a magnetic filter, sets up your controls, and walks you through everything before they leave.

On the day

What happens on installation day?

Most boiler swaps take a single day. Here's how long the engineer is on site, what you need to prepare, and what happens before they leave.
How long will it take?
A combi swap is usually done in a single day. System conversions (e.g. removing old tanks) can take 1-2 days.
Do I need to be home?
Someone over 18 needs to be in the property while work is underway, but you won't need to do anything. We just need access to the boiler and any relevant pipework.
Will I have heating and hot water?
Your heating and hot water will be off while the old boiler is disconnected. Everything will be back on and tested before the engineer leaves.
Should I prepare anything?
Clear about a metre of space around your boiler so the engineer can work comfortably. We lay dust sheets and clean up after ourselves.
What does the engineer actually do?
Disconnects and removes the old boiler, fits the new one, flushes the system, installs a magnetic filter, sets up your controls, and walks you through how everything works.
What happens to the old boiler?
We take it away and dispose of it responsibly. You don't need to arrange anything.
Get your boiler quote Takes a few minutes. No obligation.

Ready for a new boiler?

Answer a few questions about your home and get a fixed, all-in price in minutes.

Get my boiler quote Call 0800 222 9494

What do boiler customers say about UKEM?

Verified Trustpilot reviews from homeowners who had their boiler installed by our engineers.

4.8
1,570 verified reviews
  • Trustpilot

    “New combi boiler fitted in a day. The engineer was on time, laid dust sheets everywhere, and left the kitchen spotless. Boiler is whisper-quiet compared to the old one.”

    Boiler
  • Trustpilot

    “Went from an ancient back boiler to a new Worcester Bosch combi. The engineer was here for a day, walked us through the controls, and the house has never been this warm. Should have done it years ago.”

    Boiler
  • Trustpilot

    “Had an old back boiler converted to a combi. Took two days and the team talked us through every step. The 10-year warranty on the Worcester Bosch gives real peace of mind.”

    Boiler
  • Trustpilot

    “New combi boiler fitted in a day. The engineer was on time, laid dust sheets everywhere, and left the kitchen spotless. Boiler is whisper-quiet compared to the old one.”

    Boiler
  • Trustpilot

    “Went from an ancient back boiler to a new Worcester Bosch combi. The engineer was here for a day, walked us through the controls, and the house has never been this warm. Should have done it years ago.”

    Boiler
  • Trustpilot

    “Had an old back boiler converted to a combi. Took two days and the team talked us through every step. The 10-year warranty on the Worcester Bosch gives real peace of mind.”

    Boiler
  • Trustpilot

    “New combi boiler fitted in a day. The engineer was on time, laid dust sheets everywhere, and left the kitchen spotless. Boiler is whisper-quiet compared to the old one.”

    Boiler
  • Trustpilot

    “Went from an ancient back boiler to a new Worcester Bosch combi. The engineer was here for a day, walked us through the controls, and the house has never been this warm. Should have done it years ago.”

    Boiler

1,570 verified reviews on

Trustpilot

Customer video testimonial
One Company, One Plan

What works well with a new boiler?

If you're upgrading your heating, it's worth thinking about what else could cut your bills.

Solar & Battery

A new boiler still runs on gas. Solar panels offset that cost from day one.

Learn more

Heat Pumps

Ready to move off gas entirely? A heat pump could save you more over 10 years.

Learn more

EV Chargers

Upgrading your home? Add a charger while we're there.

Learn more
Ideal Vogue Max gas combi boiler newly installed by UKEM in a UK kitchen, A-rated and up to 10-year manufacturer warranty
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Common Questions

What do people ask us about new boilers?

Straight answers on cost, timing, boiler types, and what's included.

What's included in a UKEM boiler installation?
You get the boiler and flue, full system power flush, magnetic filter, all required pipework, and Gas Safe registration. UKEM Group adds a 2-year workmanship warranty on our labour; the manufacturer warranty is 7 years on Ideal Logic 2 or up to 10 years on Ideal Vogue Max and Worcester Bosch Greenstar models, depending on registration.
How much does a new boiler cost?
A UKEM quote covers the boiler, flue, flush, filter, Gas Safe certification, and both warranties in one figure. The number depends on the model and whether you need a combi swap, a system conversion, or a heat-only replacement. Use the online quote tool and you will see a full breakdown in minutes with no obligation.
Which boiler type is right for my home?
Combi boilers suit most homes with 1-2 bathrooms: they heat water on demand with no cylinder. Heat-only boilers pair with a cylinder and suit larger homes or low mains pressure. We size the output in kW from your heat load and hot water demand, typically 24-30 kW for an average house combi.
How long does a boiler installation take?
From accepting your quote to installation is usually 3-5 days. On site, a combi swap is often 1 day; a regular-to-combi conversion is typically 1-2 days because of tank removal and extra pipework. We confirm the date before we start.
What warranty do I get?
Every job includes a 2-year workmanship warranty on our installation work. Manufacturer cover is 7 years on Ideal Logic 2 or up to 10 years on Ideal Vogue Max and Worcester Bosch Greenstar lines when registered correctly. Keep annual servicing to protect both warranties.
What brands do you install?
UKEM Group installs Ideal Heating and Worcester Bosch only. Combi lines include Ideal Logic 2 (30-35 kW, 7-year warranty), Ideal Vogue Max (26-40 kW, up to 10-year warranty), and Worcester Bosch Greenstar 4000 (25-30 kW) and 8000+ (32-50 kW, up to 10-year warranty). We also supply heat-only models from both brands.
Do you offer finance?
Yes. You can spread the cost with fixed monthly payments, including 0% interest-free credit over 36 months on boilers, or 9.9%APR Representative over up to 15 years. Finance is arranged through our FCA-authorised principal with clear terms. Subject to status and affordability.
Should I consider a heat pump instead of a boiler?
Air source heat pumps use roughly a third of the input energy of a gas boiler for the same heat output and can qualify for up to £7,500 off through the Boiler Upgrade Scheme when the property is eligible. They suit well-insulated homes. A new gas boiler remains sensible where gas is already in place, insulation is limited, or upfront cost is the priority. We install both and can compare options.
Are there grants for replacing a gas boiler?

There is no UK grant for a like-for-like gas-to-gas boiler swap. The Boiler Upgrade Scheme only funds heat pump replacements. If you are on a low income or qualifying benefits, the ECO4 scheme and the upcoming Warm Homes Plan can cover boiler-related upgrades. Our 2026 grants guide walks through every option.

Combi vs system vs regular: which do I actually need?

Quick rule of thumb: combi for 1-2 bathroom homes with decent mains pressure (no tank, hot water on demand). System for 2-3 bathrooms or homes that need stored hot water but want a sealed setup. Regular (heat-only) for larger homes, low mains pressure, or where the existing cylinder and tank layout stays. See our full comparison guide.

How does pay monthly work for a new boiler?

Once your quote is agreed, you apply for finance online with our FCA-authorised lender. You choose a term that fits your budget and pay a fixed amount each month by direct debit. The full installation cost is settled with us by the lender, so your engineer fits the boiler as normal. See our finance page for the full process and eligibility.

Will applying for boiler finance affect my credit score?

The initial eligibility check is a soft search, which is not visible to other lenders and has no effect on your score. If you proceed with a full application, the lender then runs a hard search, which is recorded on your credit file. We always show the soft-search outcome first so you can decide before any hard footprint is left. Full detail on the finance page.

Looking for more detail? Read our boiler advice guides or grants and schemes if you are weighing a heat pump or other funding.

UKEM engineer with a tool bag speaking to a homeowner in a modern kitchen, wall-mounted boiler visible inside a cabinet

Want to see what a new boiler would cost? Get a price in a few minutes.

Answer a few questions about your home and we'll give you a fixed, all-in price.

Get my boiler quote Call 0800 222 9494