Category Archives: Boiler

Combi Boilers

New combi boiler installation

The most popular type of domestic gas central heating boiler in the UK. How much does it cost to install new combi boiler?

How much does a combi boiler cost?

The cost of a new combi boiler can vary depending on boiler brand and kw output, property size, and how much the installer charges for fitting.

Generally you should be paying around £1500-£2000 for a mid range combi boiler.  This price should include boiler installation. However there may be extra costs if you need new pipework, rewiring or you prefer to move your boiler to a new location within your property.

NEW COMBI BOILER
INSTALLATION
APPROX COST OF MID RANGE COMBI BOILER TIME
Install new combi boiler
in the same location
£2000 1 day
Install new combi boiler in a new location £2500 1- 2 days
Get 3 separate quotes for a new combi boiler>>


Choosing the right boiler

Before buying a new combi you there are several things you should check (in addition to the price of the new boiler and any installation costs).

  • Is your new boiler a condensing boiler? This type of functionality is mandatory for any new boiler installations in the UK as they are more energy efficient
  • Will heating controls / room thermostat come as standard?
  • kw output of  new combi boiler – the power output of a boiler is measured in kw (kilowatts).  A larger boiler will cost more than one with a lower kw output

The table below lists the size of boiler and typical kw output needed to heat water and radiators within different property types.

Property Type RADIATORS TYPICAL OUTPUT
Flat / Smaller House Up to 10 24kw
3-4 Bedroom House 15 30kw
Large Detached 20+ 35kw – 42kw
Approximate kw output required

Paying monthly with a combi boiler finance plan

The price of a new boiler can be too expensive for most of us to pay in one go.  However many families are taking advantage of a new method of replacing their old boilers.

Many suppliers have introduced pay monthly boiler plans which allow you to spread the cost of a new central heating system into smaller installments each month.

How do boiler finance plans work?

Subject to qualification you can have a new combi boiler installed with no upfront cost.  Monthly payments are made from the energy you save after your new combi boiler is installed.

A new A rated  boiler means  savings of around £30 per month in the average size family home. This means that your new boiler starts paying for itself right away.

Furthermore, if you choose a longer warranty any boiler cover plan you have will not be needed. This means more savings each year. Your new system can end up paying for itself.

  • flexible finance plans to suit your budget
  • small monthly payments
  • A rated condensing combi boiler
  • No deposit options
  • warranty included
  • No boiler cover required
  • New combi boiler from £20 PER MONTH

Through our network of approved Gas Safe installers Boilers UK can help you find the bests combi boiler deals. Leave a few details and we will put you in touch with 3 individual partners who can give you no obligation quotes .

Cost of a new boiler

Why should I replace my boiler?

It is estimated that during winter months your heating accounts for up to 60% of your energy bills. Therefore it is important that your boiler is heating your home at the lowest possible cost.

Many old boilers have a low energy rating . As a result you may be paying far more than you have to for your hot water and central heating.

Replacing your old one with a new boiler can mean savings of approximately £300 per year in the average UK home. That equates to £25 per month towards the cost of a new boiler.

Furthermore, a new combi boiler will come with a warranty of up to ten years. Therefore any boiler cover plan you currently have will not be needed. This means more savings on energy costs.

What is a combi boiler and how does it work?

A combi boiler is a central heating boiler and a water heater combined into one. It heats water for your  taps and radiators without the need for a storage tank.

This means overall they are more energy efficient than regular boilers because they provide instant hot water on an “as required” basis. As a result there’s no need to heat up a  whole hot water cylinder when you only want to use a little.

Combi boilers are also popular because they are more compact than other boiler types. Conventional gas boilers require extra storage space in your loft or cupboard.

The diagram below provides a simplified example of how a combi boiler generates hot water for your taps or central heating system.

New Combi Boiler Diagram - How a Combination (Combi) Boiler Works
Installing a new combi boiler
  • Cold water enters the combi boiler via the mains tap (Note there is no  water storage tank)
  • A sensor detects that heat is required and the burner inside the boiler is fired up
  • The cold water is passed through a heat exchanger and reaches the required temperature
  • Hot water is fed to your tap from the boiler

Advantages of a combi boiler

  • Energy efficient
  • Lowers carbon dioxide emissions
  • Only heat the amount of water that you need
  • Compact and aesthetically pleasing as they can be placed in cupboards or smaller storage spaces
  • No need for water storage tank or hot water cylinder

 Popular boiler brands

Free boiler grant scheme

If you live in a low income household you may still qualify for a free boiler.  The Energy Company Obligation runs until the Autumn of 2018.

ECO is a Government-led energy efficiency scheme that provides funding to help families on benefits or tax credits with home improvement measures.

If you are eligible you may qualify for a brand new A rated boiler free of charge. Find out if you qualify for an ECO boiler grant >>

What our visitors say

“The cost of paying for a new boiler in one go was outwith my budget. Smaller monthly payments was much easier and i ended up no worse off due to the reduction in my energy bills”

Condensing Boilers

Condensing Gas Boilers
Gas Boiler - Condensing high efficiency combi boiler

Condensing gas boilers function at extremely high efficiency levels because of their design.

Condensing boilers are designed to preheat water from the mains cold water tap before it is heated by the boiler’s burner.

The water is already warm so takes much less time to heat, saving on both energy and heating costs.

The condensing functionality of a boiler is a feature rather than a specific boiler type. As such, both regular boilers and combi boilers can have this functionality.

Conventional Gas Boilers

Regular gas central heating boilers work in a straightforward fashion –  there has to be enough energy generated to heat the cold water in a large tank.

By heating water via a heat exchanger – fuel, or gas, is burned and the heat passes through a compartment where a percentage heat is transferred to cold water.

This hot water is used to heat your radiators or for your hot water taps. The remainder of the heat escapes from the boiler.

This can be very expensive – especially if you only want to heat water for your hot taps, for example, as it means heating up your whole central heating system.

Energy efficient design of condensing boilers

A condensing boiler partially heats cold water before it enters the burner by means of a heat exchanger.  Technically a thermal transfer of heat occurs from the exchanger to the water, warming it up before it reaches the boiler.

Condensing boilers are A rated. This means that they function at 90% efficiency or above. They use less energy, which means that less harmful carbon dioxide emissions are released into the environment, heat your water more effectively so that your gas bills are reduced.

As much as 60% of heating costs are used to heat your boiler for hot water or warmth in the home.

Domestic Gas Boiler Efficiency Grades

SEDBUK (Seasonal Efficiency of Domestic Boilers in the UK) are the

Energy Performance Certificate for Gas Boiler
Gas boiler energy-efficiency ratings

advisory organisation responsible for the grading of boilers in England, Scotland & Wales.

The diagram shows the range of traditional energy-efficiency ratings for conventional boilers and central heating systems.

All gas condensing boilers function at over 90% efficiency, This is also the mandatory level for any new boiler installed in the UK.

Domestic Gas Boilers &  Energy Performance

The body which determines a boiler’s grading is SEDBUK (Season Efficiency of Domestic Boilers in the UK).

Boiler and central heating performance contributes to the overall energy performance of your property and is included in any Energy Performance Certificate (EPC) or Report.

Boiler performance is measured as a percentage although the European Grading method (A-G according to energy usage performance) is also often included for consistency.

The energy efficiency of gas boilers (the free boilers available in the UK are gas boilers) is assessed on a variety of factors including –

  • seasonal conditions
  • heating usage patterns
  • housing occupancy
  • boiler storage conditions
  • where boiler is located
  • boiler insulation

Other factors deemed to affect the energy efficiency of boilers such as climate and the age of a boiler are also taken into account when assessing a boiler’s performance.

The boiler rating system is designed to be a fair and accurate method of determining boiler efficiency, regardless of manufacturer.

If you are unsure about your boiler or its energy rating you can get it surveyed by a Domestic Energy Assessor. The assessor will come to your home and determine its energy efficiency rating.

How much can I save?
Annual savings
Comparison of typical A Grade condensing boilers compared to older less efficient boilers
Boiler Type Boiler
Efficiency
Flat Bungalow Terraced Semi-detached Detached
Condensing A Grade Boiler 99%  £186  £234  £242  £270 £368
Heavy weight 55%  £308  £393  £408  £458  £634
Light weight 65%  £266  £338  £350 £393  £542

Cost of replacing your boiler

Find out if you qualify for a free boiler replacement here – Free Boilers

Information resources

Condensing boilers

Boiler Payment FAQ’s

Pay Monthly Boilers & Free Boilers

Confused by the current boiler finance plans, free boiler schemes, ECO boiler grant schemes, Green Deal Finance, replacement boiler schemes, boiler scrappage, boiler replacement and boiler upgrade schemes currently on offer in the UK?

Hopefully this will clear things up a little.

There are currently two main options for replacing your central heating boiler, if you have mains gas central heating.  An ECO Free Boiler Grant or a  Pay Monthly Boiler Finance Plan

ECO free boiler scheme

The Energy Companies Obligation – or ECO, as it is better known, still provides free boilers and home insulation products. This scheme is for those in more vulnerable sections of society and you have to meet certain benefit / low income requirements to qualify.

Free ECO boiler grant qualification criteria

Pay Monthly Boiler Finance

Boiler Finance  have only recently become available in 2014. There are many deals on new boilers from a variety of suppliers and boiler manufacturers and it can appear quite confusing as to which offer to go for.

All of the boiler payment plans are part of the same scheme and it is really down to individual choice.

All gas boilers installed in the UK must be A-grade condensing boilers which have an efficiency level of over 90%

Find the latest boiler payment plans & new combi  boiler deals in your area

What type of boiler will I get if I apply for a boiler  monthly finance plan?

Any new boiler fitted either via one of the Boiler Finance options or as part of the Free Boiler ECO Grant Scheme will be  from one of the UK’s leading boiler manufactures or suppliers – Vaillant, Glow Worm, Baxi Boilers, Ideal Logic etc.

New boiler Finance Plans

The cost of a new boiler

Powering your boiler and central heating system efficiently is one of the most important factors of home life. The cost of a new boiler can also be expensive if you don’t get sound advice. Here we provide a few tips to help you choose the best boiler at the right price.

How much will a new boiler cost?

Whatever way you look at it a new boiler is going to cost you money. However if you’re careful and do it the right way you can make sure that you don’t pay any more than you have to.

If you use one of the larger energy companies like British Gas you may be charged over the odds for the cost of a new boiler.

It is important to shop around and check what deals and offers are available in your area. Many local installers now offer a variety of low interest finance options which can mean a substantial reduction in the cost of getting a new boiler fitted.

How much should I expect to pay?
The price of getting a new boiler installed depends on the size and type of your property. Boilers come in a range of sizes. The kw output of a gas boiler needed to heat a 5 bedroom detached house will not be needed to heat a one bedroom flat for example.

Therefore it is best to get advice from a Gas Safe approved engineer who will advise you on  the type of boiler required to heat your home and any additional pipes / wiring work that may be required.

Choosing the right boiler

Choosing a new  boiler for your home normally boils down to a choice between a regular boiler or a combi boiler .  They both function in different ways. The type of boiler most suited to your home will depend on a number of factors including

  • type and size of property
  • number of bathrooms
  • hot water usage levels

Conventional boilers

A regular or conventional boiler stores hot water in a storage tank or cylinder (normally in your  loft or  cupboard) which then provides water for your hot taps and radiators.

They normally come with an electric immersion heater and if your boiler system is older, the chances are that it will be this type.

Conventional boiler systems require storage space and can be inconvenient as you have to heat up all the water in the tank even if you only need to use a small amount.

This can be quite expensive – as much as 65% of energy costs are used to heat your boiler for hot water or your radiators.  Excessive energy usage is also  damaging to the environment in terms of carbon emission output levels.

Advantages of a regular boiler

  • Suitable for larger properties
  • Hot water available from multiple taps
NEW REGULAR BOILER
INSTALLATION COST
Approx cost OF mid range boiler Time
Install new regular boiler
in the same location
£1800 1 day
Install  regular boiler in a new location £2100 1- 2 days
Get 3 separate quotes for  cost of a new  boiler >>

Combi Boilers

A combi boiler is combination of a hot water heater and a central heating system.

This type provides on demand hot water for your taps and to heat your radiators without the need for a water storage tank.

Combi boilers require less space to install and are currently the most popular gas boiler choice in the UK.

Advantages of a combi boiler

  • costs less to install
  • heats water on demand
  • no storage tank needed
  • more energy efficient
  • More on combi boilers 
NEW COMBI BOILER
INSTALLATION COST
Approx cost OF mid range boiler Time
Install new combi boiler
in the same location
£2000 1 day
Install new combi boiler in a new location £2500 1- 2 days
Get 3 separate quotes for the cost of a new combi boiler>>

Get a new boiler on monthly finance

If you don’t have the funds available to pay for a new boiler up front you may prefer to spread the cost of installation with a monthly finance plan. This new method of payment is popular in the UK.

How does it work?

  • new boiler installed with no large upfront payment
  • manageable monthly installments
  • 0% interest rates available.
  • a new A rated boiler saves an average of £30  per month off energy bills
  • improved energy rating
  • boiler warranty included
  • no boiler cover required

Most boiler installers now offer pay monthly finance plans.  This method of payment means no large upfront cost for installation.

You can choose a suitable finance option to suit your budget with 0 deposit and 0% interest rates available from most boiler installers.

A new efficient boiler normally means energy savings of around £30 per month.  New boiler finance costs start at £20 PER MONTH. This means that your new boiler starts paying for itself right away.

In addition to lower heating bills you can save more money by scrapping any boiler cover you may have as your new heating system will be fitted with a manufacturer’s warranty of up to ten years.

British gas boiler cover can cost around £12-£18 per month so you may end up paying less to have a new boiler installed.

Get three no obligation quotes from individual installers for a new boiler on a pay monthly basis.
Cost of a new boiler

Condensing Gas Boilers

Condensing boiler diagram
Condensing boiler diagram

Both combi or conventional boilers can have condensing functionality. Condensing boilers function at extremely high efficiency levels because of their design.

A condensing boiler partially heats cold water before it enters the burner by means of a heat exchanger.

Technically  a thermal transfer of heat occurs from the exchanger to the water, warming it up before it reaches the boiler.

The water is already warm so takes much less time to heat your home. This uses less energy and your boiler costs are reduced.

By law, all new boilers installed in the UK now have to be the condensing type.

Advantages of a condensing boiler

  • reduces carbon emissions
  • energy efficient
  • preheats your water
  • if integrated with heating controls it can substantially lower the cost of energy usage
  • more on condensing boilers
 Energy Efficiency

The diagram shows the range of traditional energy grades for conventional boilers and central heating systems.

Energy Performance Certificate
Energy Performance Certificate

The body which determines a boiler’s energy efficiency rating in the UK is SEDBUK (Season Efficiency of Domestic Boilers in the UK).

All gas condensing boilers function at over 90% efficiency, This is also the mandatory level for any new boiler installed in the UK.

Boiler ratings are assessed  by a domestic energy assessor. Boiler and central heating  contributes to the overall energy performance of your property and is included in any Energy Performance Certificate (EPC) or Report.
Efficiency is measured as a percentage although the European Grading method (A-G according to energy usage performance) is also often included for consistency.

The energy efficiency of gas boilers is assessed on a variety of factors including –

  • Seasonal conditions
  • Heating usage patterns
  • Housing occupancy at the time of installation
  • Boiler storage conditions
  • Boiler Location
  • Boiler insulation

Other factors deemed to affect the energy efficiency of boilers such as climate and the age of a boiler are also taken into account when assessing a boiler’s performance.

The rating system is designed to be a fair and accurate method of determining boiler efficiency, regardless of manufacturer.

 Energy savings

Want to know how much you can save each year by replacing your boiler? The table below lists the average annual savings by property type when you upgrade to a more efficient boiler.

Larger homes will benefit more from reduced energy bills after installing a cost effective high efficiency boiler.

Boiler Type Boiler
Efficiency
Flat Semi-detached Detached
Condensing A Grade Boiler 99%  £186  £270 £368
Heavy weight 55%  £308  £458  £634
Light weight 65%  £266 £393  £542
Comparison of typical A rated condensing boiler compared to older less efficient boilers in average properties
Free boiler grant scheme

Some low income households can access Government funding to help improve the energy efficiency of their homes.

The ECO free boiler scheme provides non-repayable grants for families who claim certain benefits or tax credits

The scheme is funded by the UK major energy companies and is part of a UK Government initiative  to lower carbon dioxide emissions. The full eligibility criteria can be found here – free boiler scheme.

Additional information resources

Condensing boilers
Combi boilers
Energy Company Obligation
Gas Safe