New Boiler Installation in Cambridge
Fixed-price combi, system and regular boiler installations by Gas Safe engineers. Vaillant Advance and Worcester Bosch accredited, with guarantees of up to 10 years on selected models. Most like-for-like swaps are fitted in a day.
Get an instant new boiler estimate
Answer a few quick questions for a realistic price range, including VAT. Then book a free survey and we’ll confirm a fixed price in writing.
Typical installed prices including VAT: like-for-like combi swaps from £2,649, regular (heat-only) boilers from £2,797, system boilers from £3,096, and conventional-to-combi conversions from £3,810. Boilers in a loft or with a roof flue cost more. Your final price is fixed after a free survey.
Why Cambridge homeowners choose us for a new boiler
A new boiler is a big decision. Here’s what you get with Cambs Heating.
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Up to 10-year guarantee
As Vaillant Advance and Worcester Bosch accredited installers, we can offer extended manufacturer guarantees on selected boilers.
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Fixed price, in writing
Your quote is fixed after the survey, so the price you agree is the price you pay.
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Most swaps in a day
Like-for-like replacements are usually done in one day. Conversions or moving the boiler take 2–3 days.
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Local and accountable
Our own Gas Safe engineers, based on Coldhams Lane, Cambridge. We’ll always tell you who’ll be working in your home.
What type of boiler do I have?
Not sure what’s in your home? These simple diagrams show the difference. If you’re still unsure, the calculator asks easy questions and our engineer will confirm at your free survey.
CombiMains water inKitchen tapShower
Combi boiler
Heating and hot water from one box. Hot water comes straight from the mains when you turn on a tap, so there’s no hot water cylinder and no tanks in the loft. The pump and expansion vessel are built in.
You probably have one if: there’s no cylinder cupboard and no tanks in the loft.
SystemUnventedcylinderMains water inShower
System boiler
Heats your radiators and an unvented hot water cylinder, fed straight from the mains. The pump and expansion vessel are built into the boiler and the system is sealed, so there are no tanks in the loft.
You probably have one if: you have a cylinder (often unvented) but no loft tanks, and a pressure gauge on the boiler.
Cold tankF&E tankMains water inHeat onlyVentedcylinderVent pipeShowerExternal pump
Heat-only (regular) boiler
Heats your radiators and a vented hot water cylinder, usually in an airing cupboard upstairs, with an external pump. It’s either open-vented, with tanks in the loft and a vent pipe, or sealed, using an external expansion vessel and pressure relief valve (a sealed system kit).
You probably have one if: there’s a separate pump next to the cylinder, and often tanks in the loft.
HeatingHot waterCold waterPumpExpansion vessel
Which type of boiler do you need?
We install all three main types of gas boiler. We’ll recommend the right one after looking at your home, hot water use and number of bathrooms.
Combi boiler
Best for most flats and 1–2 bathroom homes
Heats water on demand straight from the mains, so you don’t need a hot water cylinder or loft tanks.
- Compact, frees up cupboard space
- Hot water whenever you need it
- Usually the lowest-cost installation
System boiler
Best for larger homes with 2+ bathrooms
Works with a hot water cylinder, so several taps and showers can run at once with strong pressure.
- Great for busy households
- Works with unvented cylinders
- Heat pump ready if you upgrade later
Regular (heat-only) boiler
Best for older systems you want to keep
Uses a cylinder plus loft tanks. Often the simplest swap where the existing pipework suits it.
- Good for older properties
- Compatible with existing tanks
- Can be converted to a combi or system later
What’s included in every installation
No hidden extras. Every new boiler we fit includes:
- Free home survey and boiler sizing for your home and hot water use
- Removal and disposal of your old boiler
- New boiler, flue and controls fitted to manufacturer standards
- System clean and inhibitor to protect the new boiler
- Magnetic system filter fitted as standard
- Free carbon monoxide (CO) alarm with every installation
- Gas Safe certificate and Building Regulations registration
- Manufacturer warranty registered for you
- A walk-through of your new boiler and controls before we leave
Signs it’s time for a new boiler
Most boilers last 10 to 15 years. It’s usually worth replacing yours if:
- It’s over 12–15 years old and breaking down more often
- Repairs are getting expensive or parts are hard to find
- Your energy bills keep rising
- Radiators take a long time to heat up
- The pilot flame burns yellow instead of blue (call us straight away)
Not sure? Book a repair visit and our engineer will tell you honestly whether it’s worth fixing.
How it works
From instant estimate to a new boiler, in three steps.
Get an instant estimate
Use the calculator above to see a realistic price range in under two minutes.
Free home survey
We visit, check your system and give you a fixed written quote with no obligation.
Installation day
We fit your new boiler, test everything, register your warranty and leave the area tidy.
What our customers say
Rated 4.8 out of 5 from more than 140 Google reviews.
“We have recently had our boiler replaced and eight new radiators installed by Cambs Heating, and we could not be happier with the service we received. From the initial quotation through to completion, everything was handled professionally…”
Helen N. · Google review
“Best value quote we could find for a boiler replacement, process was very smooth and professional and Ben was highly knowledgable. Would recommend!”
Ross C. · Google review
“Excellent service from Matt & Ben at Cambs Heating on a boiler replacement. Quick and efficient process from beginning to end and did a great job. Highly recommended!”
Ollie D. · Google review
Thinking about a heat pump instead?
We’re MCS certified as well as Gas Safe, so we can quote both and explain the running costs honestly. You could get £7,500 off an air source heat pump, or up to £9,000 for off-grid homes.
New boiler FAQs
Answers to the questions we’re asked most about boiler replacement.
How much does a new boiler cost in Cambridge?
A like-for-like combi swap typically starts from £2,649 including VAT. Regular (heat-only) boilers start from £2,797, system boilers from £3,096, and converting a conventional system to a combi starts from £3,810. Moving the boiler, or fitting it in a loft or airing cupboard with a roof flue, adds to the price, and the estimate shows these extras line by line. Use our instant estimate for a price based on your home. Your price is fixed after a free survey.
Is the survey really free?
Yes. The home survey and written quote are free, with no obligation.
How long does a boiler installation take?
A like-for-like replacement usually takes one day. Converting from a regular or system boiler to a combi, or moving the boiler, normally takes 2–3 days.
Which boiler brands do you install?
We mainly install Vaillant and Worcester Bosch boilers. As accredited installers we can offer extended guarantees of up to 10 years on selected models.
Do I need a combi, system or regular boiler?
Combi boilers suit most flats and homes with one or two bathrooms. System boilers suit larger homes where several showers run at once. Regular boilers suit older systems with loft tanks. We’ll recommend the right type at your free survey.
Can you move my boiler to a different place?
Yes. We can relocate boilers, for example from a kitchen into a cupboard or loft. It adds to the cost and time, and we’ll include it in your fixed quote.
Will I be without heating and hot water?
Only during the installation itself. For most like-for-like swaps that’s a single working day.
Is anything extra included?
Yes. Every new boiler includes a magnetic system filter and a free carbon monoxide (CO) alarm, as well as a chemical system clean and inhibitor.
Do you register the warranty and Building Regulations?
Yes. We register your manufacturer warranty and notify Building Control through Gas Safe, and send you the certificates.
Should I consider a heat pump instead?
It’s worth considering, especially if your home is well insulated. We’re MCS certified, so we can quote both and compare running costs. A £7,500 grant is available for air source heat pumps, or up to £9,000 for off-grid homes.
Ready for a new boiler?
Get an instant estimate now, or call our Cambridge team to book a free survey.
Related: Boiler servicing · Boiler repair · Hot water cylinders · Smart heating controls · Power flushing · Heat pumps