James Elston

James Elston

Published June 26, 2024

Expert Boiler Installation in Rothwell

How many bathrooms do you have?

How many bedrooms do you have?

How many Radiators do you have?

How soon do you need your boiler?

What Type Of Boiler Do You Need

A boiler is a big investment for your property, so making the right choice is important. Below are the various boiler types to consider for your home or business.

Combination (combi) Boiler

Combi boilers are single-unit boilers fueled by natural gas, electricity or oil. They heat water for taps and showers and provide central heating for your home. 

A combi boiler draws water from the main water supply and heats water on demand once a hot water outlet or central heating system is turned on. It does not need a hot water cylinder or storage tank, making it a very compact unit. 

These boilers have little to no standby heat loss. They are highly energy efficient and will ensure lower energy bills.

Combi boilers are best for smaller properties like apartments or townhouses with one or two bathrooms and low to medium hot water and central heating demands. Their compact size also suits homes with limited space.

combi boiler
system boiler

System boiler

System boilers use a heat exchanger, where water is heated by a burner fueled by gas or oil. 

The heated water is stored in a separate hot water cylinder, which takes up considerable space.

System boilers can heat a large amount of water, providing hot water and heat to multiple outlets. Additionally, their simple design makes them easy for heat engineers to fix when maintenance is needed. They are also quite energy efficient and can integrate with renewable energy sources like solar panels.

System boilers are best for large homes or small commercial properties as the hot water storage tank requires sufficient space.

Conventional boiler

Conventional boilers are the most widely used in the UK.

These boilers work almost identically to system boilers, except that they also have a tank where cold water is stored – typically in the loft. They also use a heat exchanger, where water is heated by a burner fueled by gas or oil. The heated water is then stored in a separate tank, ready for use.

They are very durable, so with proper maintenance, conventional boilers can provide reliable heating for well over a decade. However, It is important to note that conventional gas boilers are currently being phased out in the UK due to their carbon emissions. This means they aren’t going to be a good long-term investment. 

Conventional boilers are best used in large households or commercial properties with lots of bathrooms and high demands for heat. They produce a high heat output and can heat multiple water sources simultaneously.

conventional boiler
electric boiler

Electric boiler

Electric boilers use electricity to heat water. They are an energy-efficient option and are also an excellent choice for properties where boilers fueled by gas or oil are not permitted, or the property isn’t connected to the gas grid.

Electric boilers are a great option for apartments, smaller homes, and small-scale commercial properties because they are small and don’t require additional space for a flue or chimney because they don’t use gas or oil as a fuel supply, and therefore, don’t require ventilation.

Biomass boiler

Biomass boilers are fueled by burning natural materials, the most common being wood, in the form of pellets, logs, or wood chips. These boilers are the most environmentally friendly option seeing that they don’t use fossil fuels. Biomass boilers are suitable for medium- or large-sized homes and businesses.

Something to note is that these boilers have a high upfront cost to install. However, the materials used to run a biomass boiler will be cheaper than those fueled by gas, oil, or LPG.

biomass boiler

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

The costs of installing a new boiler in Rothwell will vary depending on the type of boiler you choose and the complexity of the installation. 

Factors that determine the installation cost include: 

  • Whether you are replacing your current boiler with the same or different type of boiler
  • Property size 
  • Upgrading your pipework 
  • Location change of your boiler placement 

Below are the estimated costs of installing a new boiler in your home or commercial business.

New Boiler Costs For Homes

One-bedroom home

Boiler typeCost (excluding installation)Cost  (including Installation)Average cost (with installation)
Combi boiler£600 – £2,500£1,600 – £3,500£2,550
System boiler£600 – £2,500£1,800 – £3,400£2,600
Conventional boiler£600 – £2,500£1,800 – £3,500£2,650
Electric boiler£550 – £2,500£1,450 – £3,500£2,475
Biomass boiler £4,000 –  £8,000£6,000 – £10,000£8,000

Two bedroom home

Boiler typeCost (excluding installation)Cost  (including Installation)Average cost (with installation)
Combi boiler£600 – £2,500£1,700 – £4,000£2,850
System boiler£600 – £3,000£1,800 – £4,000£2,900
Conventional boiler£600 – £2,800£2,000 – £4,000£3,000
Electric boiler£600 – £2,600£1,600 – £3,900£2,750
Biomass boiler £5,000 –  £10,000£8,,000 – £12,000£10,000

Three to four-bedroom home

Boiler typeCost (excluding installation)Cost  (including Installation)Average cost (with installation)
Combi boiler£1,400 – £3,000£2,600 – £4,500£3,550
System boiler£1,500 – £3,700£2,600 – £4,700£3,650
Conventional boiler£1,500 – £3,700£2,700 – £4,900£3,800
Electric boiler£1,400 – £3,300£2,500 – £4,500£3,500
Biomass boiler £7,000 –  £14,000£10,000 – £18,000£14,000

Five or more bedrooms

Boiler typeCost (excluding installation)Cost  (including Installation)Average cost (with installation)
Combi boiler£1,500 – £3,500£2,600 to over £4,500£3,550
System boiler£1,600 – £4,300£3,000 to over £5,000£4,000
Conventional boiler£1,600 – £4,500£2,900 to over £5,000£3,950
Electric boiler£1,550 – £3,500£2,500 to over £4,500£3,500
Biomass boiler £8,000 –  £15,000£10,000 to over £20,000£15,000

New Boiler Costs For Commercial Businesses

Below are tables showing the estimated boiler costs for small, medium, and large businesses.

Small Businesses

Boiler typeCost (excluding installation)Cost  (including Installation)Average cost (with installation)
Combi£600 – £2000£1,900 – £3300£2600
System£600 – £2900£600 – £3500£2050
Conventional£600 – £2700£1800 –  £4000£2900
Electric£550 – £1750£1900 – £3000£2450
Biomass£5000 – £10000 £10000 – £16000£13000

Medium Businesses

Boiler typeCost (excluding installation)Cost (including Installation)(Average cost with installation)
Combi£1000 – £4000£3000 – £6000£4500
System£1200 – £5000£3300 – £7000£5150
Conventional£1200 – £5000 £3200 – £7000 £5100
Electric£1200 – £4000£3200 – £6500£4850
Biomass£6000 – £12000 £11000 – £20000£15500

Large businesses

Large businesses will likely need much larger boilers. They have a significantly higher demand for hot water and heating, so they will require industrial boilers with 100 to 200 kW power outputs.

For this reason, boilers for large businesses are often exponentially more expensive than for small or medium-sized businesses. The table below shows the estimated costs of installing a new boiler for large businesses.

Boiler typeCost (excluding installation)Cost  (including Installation)Average cost (with installation)
System£5000- £10000 £12500- £20000Varies widely
Conventional£5000- £10000 £12500- £20000Varies widely 
Electric£5000- £10000 £12500- £20000Varies widely
Biomass £15000- £30000£20000- £40000Varies widely 

What Size Boiler Do You Need?

Like the types of boilers available, boiler sizes also vary. Usually, boilers range from 10kW to over 70kW. Your boiler size will depend on the property’s size and insulation. A larger property with a higher hot water and heating demand will need a much larger boiler than one with a lower demand.

Insulation is also important when deciding what size boiler you need. A well-insulated property means less heat loss, and you can get away with a smaller boiler for your central heating needs. The number of radiators on a property will also impact the size of the boiler you need, with more radiators needing a larger heating output.

Below are the estimated boiler sizes you will need for homes and commercial businesses.

For homes

Number of bedroomsNumber of bathroomsNumber of radiatorsSize of boilerType of boiler 
1-210-1018- 27kWCombination, conventional, electric
3-42-310-1528-34kWSystem or conventional
5 or more4 or more15-2035-43kWConventional, biomass, system

For commercial businesses

The size of your boiler will depend on the size of your commercial business. Small and medium-sized businesses will require smaller boilers than large-scale businesses. This is due to hot water demand, the number of rooms on the property, and the number of radiators the property contains.

Below is a table with the estimated boiler sizes that your commercial property will need.

Size Number of hot water pointsNumber of radiatorsSize of boilerType of boiler 
Small11-918- 24kWCombi, conventional, electric 
Medium3 or more10-2035-45kWConventional, system, electric, biomass 
LargeOver 2020 or more55kW and more Conventional, system, biomass

 What Are The Best Boiler Brands?

According to industry experts, these are the top 5 boiler brands in the UK.

alpha boiler image


Alpha boilers have gained an excellent reputation regarding affordability and quality. Their most stand-out boiler is the E-Tec Plus combi boiler which is one of the most highly recommended boilers on the market. Alpha’s boilers come with a 7 to 10-year warranty.


The Viessman boiler range is affordable and of exceptional quality. Their most popular boiler is the Vitodens, which comes with a 7-year warranty. Most of Viessman’s other boilers also come with a 7 to 10-year warranty.

viessman boiler image
vaillant boiler image


Vaillant is one of the UK’s oldest, most reliable, and most affordable boiler brands. The brand supplies combi, system, and conventional boilers. Vaillant is also committed to an environmentally friendly approach.

Worcester Bosch

The reason Worchester stands out on the market is because of the length of its warranty. With a warranty of 12 years, it pays tribute to the brand’s quality. On top of that, they are also highly affordable.

worcester bosch boiler image
ideal boiler image eco happy


Ideal boilers have an excellent reputation for efficiency. They offer conventional, system, and combi boilers of all sizes. This means that they cater to everyone’s needs. Ideal boilers also come with a warranty of 10-12 years.

When Should You Install A New Boiler?

Whether you need a boiler service or opt for a complete boiler replacement will depend on several factors. Generally, you should replace your boiler if it is over 10- 12 years old or needs constant servicing, which will cost you more money to fix than buying a new one.

Below are some signs to look out for when you need to replace your boiler:

  • You need help finding parts to repair it, which could indicate it is too old
  • Constant leaking
  • Making abnormal sounds
  • Low water pressure
  • Rancid smells
  • Your water and energy bills are abnormally high (despite no change in usage behaviour)

The best time of year to install a new boiler is in summer.

Boiler companies and heating engineers will be less busy during summer. Winter months are chaotic regarding boiler emergencies, so it is not a great idea to try to schedule an installation then.

Why Choose Eco Happy?

We are your trusted, reliable and professional boiler installers in Rothwell, West Yorkshire.

Get Your New Boiler Installation Quote Today

For boiler installations for your home or business, visit our website to get your quote today. Simply fill out our form; it’s free and quick to complete. We will email your quote shortly after!


When having your boiler installed, you should use a professional gas or heat engineer. They will be certified as Gas Safe, so you can trust your installation will be safely and expertly done. Some plumbers are Gas Safe registered and may be able to assist you as well.

Installing a new boiler will decrease your energy bills, make your home and business more energy efficient, and ensure that your property has reliable heating in the colder months.

If you are doing a boiler swap, meaning you are replacing your old boiler with the same type, it should take 4-6 hours. A more complex installation, where a completely new system is installed, could take 1- 4 days.

James Elston

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.

Leave a Reply

Your email address will not be published. Required fields are marked *