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How much a new boiler costs (with installation) in 2019

The cost of a new boiler installation has been shrouded in mystery for centuries. We've raided the tombs of boiler knowledge and unpacked the baggage of installation prices.

So, how much will a new boiler actually cost in 2019?

New Boiler Cost Question

Finding the true cost of a new boiler is incredibly confusing and anger inducing, like struggling to remove a spider web from your face.

Why do boiler installations range from worryingly cheap three figure deals to mortgage worthy sums from the big energy companies?

Important take home point: You do not have to buy your boiler from the company that provides your gas or energy bills, irrespective of what their sales driven fame hungry penguin ambassador may suggest.

We’ve made boiler quotes more transparent than Ted Bundy’s nice guy persona and as fixed as North Korea's stance on nuclear weaponry – get that boiler quote here.

What are you getting – or not getting – for your money?

We’ll teach you how much is too much, why to avoid anything that looks too cheap to be true and why it’s never just as simple as boiler cost + labour.

The raw bones of pricing structure may well be cost of boiler + labour cost.

But that’s an oversimplification.

Here are the top 10 factors to take into account when calculating the cost of a new boiler (...there's a lot!):

#1 - Cost of the b
oiler (£400£1200)

Cost of boilerProbably the most pivotal aspect to any installation – the actual boiler. Costs for quality boilers will be in the high hundreds/early thousands and vary depending on their quality, model, kW size and brand.

Cost IconTypical boiler cost:
£400  £1200

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#2 - Labour/installation cost (£600£1500)

Cost of labourThe amount of money assigned by an engineer or company to carry out the work. This will vary business to business and person to person but also by property location, how long it takes to install the boiler (combi swaps are a lot quicker than back boiler conversions!) and number of engineers required.

Beware that some energy providers will charge enough commission to cover a regional office party with an open bar, attended exclusively by middle aged divorcees

Cost Icon

Labour cost (swap):
£600  £800

Cost Icon

Labour cost (conversion):
£1000  £1500

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#3 - Vertical flue cost (£300→£600) 

Vertical flue costA boiler flue, simply put is the large pipe that leads from the boiler to outside of your home – ensuring condensation and flue gases are pumped outside and not into your own face – vital.

Most of the time, the flue will leave your property horizontally incurring no extra costs but flues that leave vertically through your roof require much more work and therefore incur more costs. It can be just plain bad luck.

Cost Icon

Typical vertical flue cost:
£300  £600

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#4 - Plume kit cost (£90→£130)

Plume kit costA plume kit is essentially an extension kit that attaches to your boiler’s flue. The plume kit is required in instances where your boilers flue is too close for comfort to a window, door, neighboring property or your wife and is required by law in order to comply with Gas Safe regulations.

Failure to include a plume kit could lead to London standard air purity levels. Unless you already live in London, in which case, boiler fumes may seem a welcome breath of fresh air.

Cost Icon

Typical plume kit cost:
£90  £130

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#5 - Main gas pipe upgrade cost (£250→£400)

Gas upgrade costMany older heating systems are built using gas piping of a certain width (often 15mm). To meet modern regulations, they need to be upgraded to 22mm in most cases which can sometimes incur additional costs.

In some instances, older pipes will also be made from lead, cheddar of the bones of early settlers and these will need to be replaced with copper piping.

Heatable never charge for upgraded pipework, whereas most installation companies will add this to your bill with unnerving pleasure and an evil laugh

Be wary of rogue traders that don’t plan for upgraded pipe work – their installation will be more illegal than the contents of a duffel bag in the back of their uninsured white van.

Cost Icon

Typical gas upgrade cost:
£250  £400

Cost Icon

Our gas upgrade cost:

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#6 - Cost to relocate boiler

Boiler relocation costMoving the location of your boiler is costly and will require a lot of physical labour, additional pipework, emotional robustness as well as various general new fixtures and fittings.

Unless moving your boiler is integral to every hope and dream you have held since you were a child, do try to avoid it.

Here are Heatable's fixed costs to relocate the boiler in your home:

New boiler location Cost (£)   
Within same room + £240
Garage + £500
Loft / attic + £500
Utility room + £350
Kitchen + £350
Airing cupboard + £400
Bedroom + £400

Note: If you’re converting from a traditional boiler with a water tank, these costs will not apply but you will need to discuss viable locations for your new combi boiler beforehand.


#7 - Upgraded heating control costs (£100→£300)

Heating controls costThe days of having a pain staking, back breaking walk to your boiler to switch it on are almost behind us as a species and most new boiler installations will include some form of upgraded controller.

Depending on the type and brand of the controller, it will add varying figures to your new boiler cost.

Cost Icon

Heating controls cost:
£100  £300

Cost Icon

Our heating controls cost:
£0 - that's free!

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#8 - Upgraded warranty costs

Boiler Warranty costExtended warranties, particularly 10-year warranties in most cases are only able to be offered by trusted partners of manufacturers.

They can sometimes rely upon the fitting of additional approved equipment like magnetic boiler filters and will often incur additional costs to that installer, but a longer warranty is certainly a cost worth incurring.

Think you've found a bargain? Check the warranty length has a longer expiry date than the last lot of milk you bought


#9 - Magnetic boiler filter cost (£100→£200)

Boiler filter costFilters are installed inline on the pipework and help to protect your boiler. They use powerful magnets which trap small particles of dirt and metal, stopping them from going in to the boiler itself and causing unecessary damage.

A quality boiler installer will always build the cost of installing a filter in to your quote. We include them, but we don't charge a penny more and fit them as standard throughout the UK.

Cost Icon

Magnetic boiler filter cost:
£100  £200

Cost Icon

Our magnetic filter cost:

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#10 - Chemical flush (£100→£150)

Chemical flush costFlushes help to clear out existing sludge from your heating system. If you don't clear it, sludge will stop the hot heating water from flowing around your radiators efficiently. Not good.

There are various types of 'flushes' available. A hot, chemical flush is most common and pretty standard. But, you can pay upwards of £500 for a 'Powerflush'. Be careful with those, though. If you start forcing high pressure water through an old heating system, they can often do more damage than good.

Cost Icon

Chemical flush cost:
£100  £150

Cost Icon

Heatable's flush cost:
£0 - Free again.

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The above list is to be used as a guide only. To get a fixed, accurate price for your new boiler installation, go here.

How much do combi boilers cost?

What is a combi?

Combi BoilerA combi boiler is simply a ‘combination boiler’ - it controls both your heating and hot water, delivering them both instantly on demand and doesn’t require a hot water cylinder to be heated prior.

Combi boilers are the home heating dream that the human race has been striving towards since the discovery of fire.

Imagine if Usain Bolt was a postman, but he also did your bins. A combi boiler is like that... basically.

How to identify you have a combi boiler

We’ll assume if you purchased the boiler then you’ll be well aware if it’s a combi or not, but if the boiler was present in your home way before your arrival like a keen Boston Strangler then you could be forgiven for not having the first idea what type of boiler it is.


No Hot Water CylinderYou’ll know if you have a combi boiler because you won’t have a water cylinder or tank and the water from your taps and shower will be hot seconds after operating them. That is of course assuming you have a half decent, operational combi boiler.

A staggeringly comprehensive and overindulgent article we wrote on the Best Combi Boiler for 2019 should be your go-to read to find the most suitable new boiler for your property but the below pricing overview of our top two combi manufacturers should suffice.

Our Viessmann Combi Boiler costs (with installation):

Viessmann Combi Boiler Costs

Viessmann Model Our Price   
Vitodens 050-W 29kW £1,795
Vitodens 050-W 35kW £2,175
Vitodens 100-W 26kW £2,247
Vitodens 100-W 30kW £2,404
Vitodens 100-W 35kW £2,639
Vitodens 111-W 26kW £3,180
Vitodens 111-W 35kW £3,421

Our Ideal Combi Boiler costs (with installation):

Ideal Combi Boiler Costs

Ideal Model Our Price  
Logic Combi 24kW £1,650
Logic Combi 30kW £1,845
Logic Combi 35kW £2,245

You could sleep well for years to come having acquired any of the above combi boilers but it is without doubt that the Viessmann comes out on top in almost every comparable dimension.

In particular, the Viessmann Vitodens 050-W - a boiler with a price point an unqualified traveler couldn’t match and features to make a Worcester blush.


How much do regular/system boilers cost?

What is a regular or system boiler?

For reasons of ease and boredom evasion, we’ll combine ‘regular’ and ‘system’ boilers into the one breakdown.

Hot Water Cylinder

From a purchasing point of view, all you’ll need to know is that they aren’t combi boilers, they’ll have a separate water cylinder (usually in an airing cupboard) and/or water tank (often in your loft) and they don’t provide instant hot water on demand.

How to identify you have a regular or system boiler

If you have an agonizing wait for hot water whilst your water tank heats, you’ve ever ‘ran out’ of hot water or you’ve spotted the giant tank in your airing cupboard dressed as Pamela Anderson then you do indeed have a regular or system boiler.

But if you live in a particularly large home, or potentially have several occupants demanding hot water from numerous outlets at one time - then most combi boilers wouldn’t suffice.

As they instantly heat water passing through their system, they would be trying in vain to heat a water supply they just didn’t have, like a desperate gambler asking for a line of credit from a blackjack dealer.

So if your current regular/system setup is adequate for your home, you’re trying to avoid a costly boiler conversion or you just fear change - then here’s a snapshot of regular boiler & system boiler installation prices based on common enquiries.

Our Viessmann Regular Boiler costs (with installation):

Viessmann Regular Boilers

Viessmann Model Our Price   
Vitodens 100-W 13kW £1,995
Vitodens 100-W 19kW £2,295
Vitodens 100-W 26kW £2,540
Vitodens 100-W 35kW £2,879

Our Ideal Regular Boiler costs (with installation):

Ideal Regular Boiler Costs

Viessmann Model Our Price   
Ideal Logic 15kW £1,895
Ideal Logic 19kW £2,095
Ideal Logic 24kW £2,360
Ideal Logic 30kW £2,879

How much does it cost to convert from a regular boiler to a combi boiler?

Boiler Conversion CostUpgrading a traditional boiler to a combi boiler is a bucket list regular for most UK homeowners, sitting seven places above seeing the Pyramids and just one below breaking free from lifelong, crippling debt.

But exactly how much extra will you be paying?

Included in the cost of a boiler conversion, is the full removal of your old boiler & water cylinder, new upgraded pipework fed to the existing or new location of the incoming combi boiler and of course, the new combi boiler itself. And that’s a simplified version.

It can be a big job, requiring two days of work and engineers so in tune with their tools, they can make a crowbar dance.

Putting you out of your misery early, you’ll roughly be looking at at additional £800 - £1200 worth of expense on top the standard costs highlighted above

Typical boiler conversion prices

Here's what we charge (fixed prices) for a conversion on a typical, one bathroom home

Do note that other, much more expensive quotes are available elsewhere. Try your energy provider if you fancy a laugh.

Combi boiler model Our Price   
Ideal Logic 24kW £2,790
Ideal Logic 30kW £2,990
Viessmann Vitodens 050-W 29kW £3,039
Viessmann Vitodens 100-W 26kW £3,370

When converting your regular boiler into a combi boiler, do remember that any boiler manufacturer can be fitted so long as it’s powerful enough for your hot water demands and consider referring to our Best Combi Boiler 2019 article to gain more insight than you ever thought possible.

Back Boiler conversion costs

You can scan over a more comprehensive back boiler description in this article if you’ve ran out of paint to watch dry…

…But a broken back-boiler is an old dog that needs to be put down.

They can no longer be repaired in accordance with modern regulations and you will need to convert your system - most likely to a modern combi boiler.

Back Boiler Conversion Cost

Heatable apply a transparent, and fixed cost of £395.00 on top of our standard conversion costs. This can get much steeper when buying from other national companies so make sure you don’t settle for your first quote.

The work involved in the conversion of a back-boiler is very much similar to a standard conversion in that it includes the removal of your entire existing system and introduction of the new combi and required pipework, however it’s the awkward location of the back boiler behind your fireplace that incurs the sometimes significant extra cost.

Many installers and installation companies hate carrying out this work and will therefore simply price themselves so high they can just about bare it or high enough to discourage customers.

Case study: Converting a Baxi Bermuda back boiler to a combi boiler

Combi boiler model Our Price   
Ideal Logic 24kW £2,790
Ideal Logic 30kW £2,990
Viessmann Vitodens 050-W 29kW £3,039
Viessmann Vitodens 100-W 26kW £3,370

Converting from a Baxi Bermuda - or any brand of back-boiler - can appear costly upfront but the rewards are there to be reaped for years to come.

Replacing your old back boiler will:

  • Significantly reduce your energy bills
  • Slash your carbon footprint
  • Provide you with instant hot water on demand
  • Save your marriage
  • Improve the safety of your home
  • Increase the resale value of your property💸

New boiler cost – Ways to pay

It’s all well and good, casually throwing four figure sums around for new boilers like Greeks throw plates.

But what if you don’t have that cash available, or a credit card at your disposal?

What are your payment options?

Heatable provide monthly payment options for over 80% of customers with Viessmann’s premium 100-W range available with 0% interest proving ever popular.

Fortunately, we offer a finance package on every new boiler installation – allowing for manageable monthly payments taken over loan periods between 1 – 10 years.

Typical Heatable pay monthly boiler options

Combi boiler model Warranty Our price  Deposit APR Cost p/m  
Vitodens 050-W 10 Years! £1,695 0% 9.9% £21.93
Vitodens 050-W 10 Years! £1,695 40% 9.9% £13.16
Vitodens 100-W 10 Years! £2,384 0% 0% £99.33

How you’ll become an inadvertent recouper trooper, recouping money from realms unexplored by the human mind.

Old boilers are inefficient and for every £10 you’re spending on running them, you could be throwing up to £4 of that out of the window, creating a huge mound of pound coins on your patio that poses a risk to the local eco system.

New boilers – particularly combi boilers – are incredibly efficient compared to their older counter parts and come packed with intuitive technology to work smarter for your homes heating needs.

This greatly reduces the amount of fuel used, whether that be Gas, Oil or LPG.

Old boiler rating Semi-detached house Detached house  Detached bungalow Mid-terraced house Mid floor flat  
G (<70% efficient) £205 £315 £160 £180 £100
F (70-74% efficient) £145 £220 £110 £125 £70
E (74-78% efficient) £120 £190 £95 £105 £60
D (78-82% efficient) £110 £170 £85 £95 £55

Feast your eyes on the above typical savings curtesy of the Energy Saving Trust

They’re the most trust worthy name in UK energy savings data collection game – an industry notorious for its untrustworthy, shark filled business waters.

There are no catches with buying a boiler on finance and you will still receive exactly the same service, product and warranty as you would paying in full.

Finance eligibility is subject to a standard credit check. If you have questions at about this, call the Heatable team on 0330 113 1333.

What about boiler grants? 

Truly accessible or an unidentified flying promise?

Boiler grants are becoming harder and harder to come by and qualification for a free – or even part funded boiler – is dependent upon an increasingly stringent list of requirements.

You can find out if you’re able to qualify for any boiler funding here.

In order to qualify for a free or part funded boiler under the current Government scheme, you’ll need to meet some of the below criteria:

  • Receive a particular set of benefits
  • Live in a particular type of property
  • Own a particular type of heating system
  • Be lucky enough to live in an area with installers carrying out grant work

Unfortunately, due to a Government scheme that combines the complexity of a Rubik’s Cube, algebra and chess, even meeting all of these requirements may only get you partial access to boiler funding.

Partial funding would likely require a hefty contribution from yourself, as high as £1,200 – this cannot be offered on a pay monthly plan, leaving you no better off.

An inconclusive conclusion & some key takeaways:

New boilers costs are a financial minefield that you could research until the end of your days.

Prices range staggeringly, from close to £1,000 - £6,000 depending on work required and your chosen installation company.

Always ensure you receive the below, no matter what you’re going to be paying:

  • A fixed price with no surprise extras after work begins
  • A full parts & labour warranty that you’re comfortable with
  • A magnetic boiler filter
  • A system flush
  • Check company reviews before committing to payment

Stick to these key principles, avoid any company sending a salesman disguised as a ‘surveyor’ to your home and put in just a touch of boiler research – do that here, conveniently 😉

You’re now just about as qualified as can be reasonably expected in order to get the most competitive new boiler cost available and avoid cowboys eying you up like an early noughties PPI victim.

Or, for simplicity…

Buy from Heatable.

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Authorised and regulated by the Financial Conduct Authority FRN 805259 for credit broking.

Respresentative finance example: Purchase price: £1,695, Deposit: £847.50, Credit: £847.50, Total repayable: 2.452.30, Duration: 120 months, Rate: 9.9% APR, Cost of credit: £496.11

[1] Price based on a like for like combi swap in a 2 bed, 1 bathroom terraced home with a standard flue

[*] Installation dates are subject to installer availability