James Elston

Published May 15, 2024

A new, efficient boiler can dramatically transform your home or business. Reliable heat, great comfort, and lower energy bills are a few of the benefits.

As domestic and commercial boiler experts serving Calverley and the surrounding area, Eco Happy is dedicated to delivering great heating. We have handled thousands of successful boiler installations and have glowing customer reviews to prove it!

A poorly installed boiler can cause heating miseries, high energy bills, and even safety hazards. We know it can be daunting to choose a new boiler from all the heating solutions on the market. Eco Happy is here to help with expert advice about competitively priced boilers. We will also perform your boiler installation in Calverley, promising prompt, professional, and safe service.

What Type Of Boiler Do You Need?

Buying a new boiler for your home or business premises is a sizeable investment. The right boiler for you depends on factors such as:

  • Your property size and layout.
  • Property insulation.
  • Your heating and hot water requirements.
  • Your budget.
  • Connection to the gas grid (if not connected to gas, alternatives like an electric boiler or LPG must be considered).
  • Mains water pressure (in low-pressure areas, a conventional boiler might be a good choice).
  • Environmentally friendly choices (an electric boiler, powered by renewables, or a biomass boiler are eco-friendly options).

Let’s explore the various boiler types and their suitability in different scenarios.

Conventional boiler

Conventional (or heat-only) boilers still heat most UK homes and businesses. This system includes a hot water storage tank and usually a cold water cylinder. Conventional boilers are fuelled by either natural gas, LPG (Liquefied Petroleum Gas) or oil.

The right-sized conventional gas boiler provides robust heating for both homes and companies. It is well-suited for properties with high hot water demands as it serves multiple taps or showers simultaneously.

That said, traditional boilers are being phased out because of their high carbon emissions. This fossil fuel-burning system is not part of the UK Government’s 2050 net zero drive. Traditional boilers could be excluded from new build properties from as early as 2025. Given the circumstances, a conventional boiler might not be the best long-term choice. 

Combi boiler

A combi (or combination boiler) combines both water heating and central heating into a single, compact unit. Combi boilers draw water directly from the mains supply to provide hot water on demand. Combis are usually gas or electric.

Combi units are space-saving, efficient, and relatively easy to install. On the downside, they battle to provide hot water to more than one tap at a time.

Combi boilers are ideal for apartments, smaller houses, or small offices served by a single bathroom.

Electric boiler

An electric boiler uses electricity to heat water for your property’s central heating and hot water needs. Electric boilers are fairly compact and highly efficient, with many achieving energy efficiency close to 98%.

The boiler’s main disadvantage is high running costs. Per the latest Energy Price Cap (from 1 April to 30 June 2024), the average household’s cost for electricity is 24.50p per kilowatt hour (kWh) compared to 6.04p per kWh for gas. It may be possible to reduce your electricity cost slightly by taking advantage of off-peak Economy 7/10 electricity tariffs to heat water during off-peak hours for later use.

The cost of running an electric boiler falls significantly when electricity is generated from renewables. Connecting your electric boiler to solar or wind power offers cheap, green, low-carbon heating. This system is ideal for small office spaces and up to a medium-sized home.

System boiler

A system boiler is a central heating system well-suited to larger properties with multiple bathrooms, bedrooms, and living spaces. System boilers are also effective for medium-sized enterprises, like a 50-person office, or large businesses, like a 250-room hotel.

This boiler system is directly connected to the mains water supply. This increases efficiency and eliminates the need for a cold water tank. A good system boiler provides comprehensive central heating and handles simultaneous hot water demands well.

System boilers are typically gas, LPG, or electric.

Biomass boiler

A biomass boiler uses renewable organic materials, such as wood pellets, chips, or logs, as its fuel source instead of fossil fuels like gas or oil.

Biomass fuels are often cheaper than other options and the system is considered a low-carbon alternative. However, biomass boilers are the most expensive to install, with larger models costing £20,000.

How Much Does It Cost To Install A New Boiler In Calverley?

The cost of installing a new boiler in Calverley varies depending on the type of boiler you choose and how complicated the installation is. 

For example, if you replace a conventional boiler with a combi, you need to disconnect the piping, remove the tank systems, and establish new connections. These jobs all add to the expense.

Here are the estimated boiler installation costs in your area. Note that every situation is different and exact prices will vary.

New boiler costs for homes 

Type of BoilerCost excluding installationCost with installationAverage cost with installation
Conventional£600 – £3,600£2,000 – £4,800£3,400 
Combi£600 – £3,000£1,600 – £4,500£3,050
Electric£550 – £2,800£1,550 – £4,000£2,775
System£600 – £3,500£1,800 – £4,200£3,000
Biomass£5,000 – £14,000£9,000 – £20,000£14,500

New boiler costs for commercial businesses 

Small business

Type of BoilerCost excluding installationCost with installationAverage cost with installation
Conventional£600 – £2,700£1,800 – £4,000£2,900
Combi£600 – £2,000£1,900 – £3,300£2,600
Electric£550 – £1,750£1,800 – £3,000£2,400
System£600 – £2,900£600 – £3,500£2,050
Biomass£5,000 – £10,000 £10,000 – £16,000£13,000

Medium-sized businesses

Type of BoilerCost excluding installationCost with installationAverage cost with installation
Conventional£1,200 – £5,000 £3,200 – £7,000 £5,100
Combi£1,000 – £4,000£3,000 – £6,000£4,500
Electric£1,200 – £4,000£3,200 – £6,500£4,850
System£1,200 – £5,000£3,300 – £7,000£5,150
Biomass£6,000 – £12,000 £11,000 – £20,000£15,500

Large businesses

A standard commercial boiler typically goes up to 70 kW. Those with greater power output are classified as ‘industrial’ boilers. Some bigger businesses often need boilers with power outputs of 100 kW or even 200 kW. Boiler costs in this sector range widely; installations sometimes take weeks and cost over £20,000. 

Type of BoilerCost excluding installationCost with installationAverage cost with installation
Conventional£5,000 to over £10,000 £12,500 to over £20,000 Ranges widely
CombiNot suitable for large commercial properties. 
Electric£5,000 to over £10,000£12,500 to over £20,000Varies
System£5,000 to over £10,000£12,500 to over £20,000Varies
Biomass£15,000 to over £30,000 £20,000 to over £40,000Varies

What Size Boiler Do You Need?

Boilers come in different sizes, ranging in power outputs from under 10 kW to over 70 kW. A building with more rooms, bathrooms, and radiators requires a larger boiler. A poorly insulated building similarly needs a more powerful boiler since it loses significant heat due to ‘leakages’.

Note that you may need a higher kW output combi boiler since they deliver hot water as soon as a tap is turned on (it doesn’t have hot water stored in a tank).

For homes 

Here are common boiler outputs for various-sized residential properties.

BedroomsBathroomsRadiatorsBoiler SizeType of Boiler
111-69 kW – 24 kW (30 kW for combi)Combi, electric, conventional
211-1012 kW – 25 kW (30kW for combi)Combi, conventional, electric
3-42-310-1627 kW – 35 kWSystem, conventional, 
5 and more4 or more15 to over 2035 kW – 45 kWConventional, system, biomass

For commercial businesses

Commercial boiler sizes vary from business to business, depending on factors like the building size, layout, and insulation. Here are common boiler outputs for different-sized commercial properties.

SizeHot water pointsRadiatorsBoiler SizeType of Boiler 
Small11-99 kW – 24 kW (30 kW for combi)Combi, conventional, electric
Medium 3 or more10 – 2035 kW – 45 kWConventional, system, biomass, electric
LargeSeveralOver 2055 kW to over 100 kWConventional, system, biomass

What Are The Best Boiler Brands?

The following brands are consistently rated among the best in the UK according to consumer reviews, engineers, industry experts, and the authoritative Which? survey results.

  • Alpha: Backed by 50 years of experience, Alpha Heating Innovation brings Italian style to the UK market at competitive prices. Headquartered in Sevenoaks, Kent, Alpha offers a comprehensive range, from sleek combis for home use to powerful commercial boilers. 
  • Ideal: Ideal is a UK company with a manufacturing base in Hull that has been in the heating business for over 100 years. Ideal is known for stylish, modern boiler units that are quiet and reliable.
  • Vaillant: Vaillant is a 150-year-old business, started in Germany. Today, it’s one of the largest heating companies in Europe with a strong presence in the UK.
  • Viessmann: Viessmann is another German manufacturer founded over 100 years ago. The company prides itself on pioneering innovation. Like other leading brands, Viessmann’s range includes smart boilers with sensors, zone heating, and other features.
  • Worcester Bosch: Worcester Bosch is a UK-based company founded in 1962. It has collected an impressive 14 Which? Best Buy awards in recent years. The company provides extended warranties (10 years, even 12) – a sign of top quality.

When Should You Install A New Boiler?

Generally, you should consider installing a new boiler if your current unit is 15 years or older. 

Ongoing boiler maintenance, including regular servicing, will help keep your boiler in sound nick. However, there comes a time when boiler faults occur more regularly despite dedicated upkeep.

Here are some indications your unit may be on its last legs:

  • Your radiators are taking a long time to heat up.
  • Your heating bills are increasing without any rational explanation (like a unit price increase, for example).
  • Unexplained and unusual noises like knocking, grinding, hissing, and whistling are coming from your boiler.
  • The boiler gives off a strange smell. If you smell gas, turn the boiler off immediately and consult a technician.
  • You are spending upwards of £150 annually on boiler repairs.
  • Outside of the normal boiler service, you have to call out the technician every few months to resolve problems.
  • The pilot light of your gas boiler often burns a dirty yellow or orange instead of a clean blue. 
  • The boiler pressure keeps dropping or rising without obvious cause.

Generally, if you have a reliable boiler bought in the past decade and maintain it well, it should provide 15 years of solid service. 

Traditional gas boilers installed after 2006 are known as condensing boilers and are designed to achieve energy efficiency of over 90%. Many boilers installed before this time deliver efficiency under 65%. In this case, upgrading to a more efficient unit is advisable.

When is the best time of year to install a new boiler? 

Summer is a good time to get your new boiler installed. Boiler engineers are usually less busy in this off-peak period and you may benefit from better pricing deals.

Why Choose Eco Happy?

Even the best boiler will deliver sub-par performance if it isn’t correctly installed and configured. Eco Happy’s strict vetting procedures ensure our certified engineers in Calverly are qualified to provide top-notch installations and advice. Safety is also non-negotiable, particularly when it comes to gas safety.

Gas Safe registered engineers

By law, a gas boiler must be installed by a Gas Safe registered engineer. At Eco Happy, all our engineers are Gas Safe registered, qualifying them to perform safe installations and gas boiler servicing and maintenance. 

Professional and reliable

Eco Happy aims to deliver a world-class customer experience. Our highly qualified team will advise you about buying a new boiler, arrange all aspects of the installation, and provide reliable, professional support throughout the process. 

Fast response times

We pride ourselves on quick responses to queries and prompt installations. You can expect your boiler to be installed by an engineer in your area within days of your order – no matter what time of year.

Installation of all boiler types

Whether your boiler is gas or green, a sleek combi or a 64 kW system unit, Eco Happy’s engineers can handle the installation. Our experienced engineers are trained on all boiler types. Once you choose the boiler that meets your home’s or business’s needs, we will fit it safely for optimal efficiency.

Get Your Boiler Installation Quote In Calverley Today

Take the first step towards greater home and office comfort! Get a free quote for a new boiler installation today. Just complete a short form and we will provide a fast, competitively-priced quote.

Our friendly team of professionals is here for you every step of the way, from initial enquiry to successful installation and aftercare support.


How much does an eco-boiler cost?

Electric boilers (when fueled by electricity from renewables) and biomass boilers are eco-friendly boiler options. Electric boilers, including installation, cost between £2,000 and £4,250. Biomass boilers, including installation, cost around £7,000 to over £20,000.

Is Eco Happy’s pricing competitive?

Thanks to Eco Happy’s established relationships with major boiler manufacturers and our extensive engineer network, we offer very competitive pricing for new boiler installation, starting from as little as £2,355.

Can Eco Happy advise how to improve the insulation of my property in Calverley?

Eco Happy’s heating professionals and door and window experts can certainly advise and develop a strategy to improve the insulation of your Calverley home or commercial building. 

Other Areas We Service Near Calverley

Our boiler services cover the following areas:

ClaytonOssettWood End

James Elston

Boiler Expert

James Elston is the top boiler replacement and heating expert at Eco Happy. He has over 20 years of experience in the industry, focusing on Gas Safe boiler installations and offering home-heating and energy-saving solutions to homeowners across the UK. From sourcing the most energy-efficient combi boiler to providing specialist heating advice, James ensures that Eco Happy maintains the highest standards and best customer service.

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