Domestic Boiler Installers

Nobody enjoys being left in the cold, which is why it’s wise to choose an expert like Cinergi for independent advice, boiler maintenance, repairs and replacement. We can also provide advice on a new sustainable heating system when the time comes.

Welcome to cinergi, domestic domestic heating and boiler installers

With over 40 years of experience, Cinergi is arguably the most experienced team of heating engineers covering the South of England, including counties such as Hampshire, Dorset, Wiltshire, Berkshire, Surrey, West Sussex and Oxfordshire.

We can safely extend the life of your current boiler and supply you with a reliable and affordable replacement heating system when the time comes.

Our knowledgeable engineers can offer advice on moving to a more sustainable energy source, such as an air source heat pump or a hybrid system.

Types of boilers include...

  • Natural Gas

  • Oil

  • LPG

  • Combination boilers

  • Conventional boilers

  • System boilers

How does a domestic boiler work?

Domestic boilers are the most common heating and hot water systems for homes in the UK. They generally run on gas from the mains, but some use oil or LPG. A valve in the boiler allows the fuel into a combustion chamber where it ignites. That then powers a heat exchanger, which heats the water as it passes over it. The hot water is then distributed by an electric pump to taps and radiators.

All new boilers installed since 2005 are condensing boilers. They cleverly recycle the vapour produced by the exhaust fuel so that it isn’t lost. A modern, condensing model, therefore, is a far more energy-efficient boiler.3

Domestic Boiler Installers

Renewable energy alternatives, such as air source heat pumps are increasing in popularity and will no doubt become more commonplace once the ban on gas boilers comes into effect for all new builds in 2025

When should a boiler be replaced?

Like all appliances, a gas boiler has a finite lifespan. So how do you know if your boiler is ready to be replaced? You can expect your boiler to last around 10-15 years, but there are warning signs that it’s time to invest in a new heating system.

Gas smell: needless to say, if you smell gas, then you should turn the boiler off and call an expert straight away. The time has likely come to have a new boiler installed.

Poor performance: if your gas boiler is becoming unreliable, for example, your water is taking longer to heat, then it may be time to get a shiny new model.

Constant repairs: If your boiler is breaking down frequently, it may be on its last legs. As your boiler ages, parts start to become obsolete, so it’s harder to repair them.

Increased bills: If your bills are creeping up (even more than they should be), then it may be that your boiler is losing efficiency.

Our boiler installation service

At Cinergi, we offer a comprehensive boiler installation service to ensure your home or business stays warm and comfortable throughout the year. With our expertise and dedication to quality, you can trust us to provide efficient and reliable boiler installations tailored to your specific requirements.

Discover Your Boiler Options

Explore a range of boiler options with Cinergi to find the perfect fit for your property. Whether you're looking for a gas boiler or, perhaps a hybrid solution with a heat pump, we have the knowledge and experience to guide you through the selection process.

Pick the right boiler for you

Choosing the right boiler is essential for optimal heating efficiency and performance. Our team will assess your heating needs, property layout, and budget to recommend the most suitable boiler size to meet your requirements.

We Install and Maintain

We offer a fast and efficient service on an installation date to suit you, with ongoing support and maintenance. Our skilled technicians handle every aspect of the installation process with precision and care, ensuring that your boiler is installed correctly and functions at its best for years to come.

Cinergi boiler installers near you

Our local engineers serve customers across Hampshire, West Sussex, Wiltshire, Dorset, Somerset, and beyond with top-quality boiler installation services. Whether you’re in Southampton, Brighton, Salisbury, Bournemouth, Taunton, or anywhere in between, you can count on Cinergi for all your boiler installation needs.

Contact us today to schedule your installation or request a consultation.


Cinergi is your trusted partner for boiler installations in Hampshire, offering reliable and efficient heating solutions for homes and businesses across the county. With our extensive experience and expertise, we ensure that your boiler is installed to the highest standards, providing optimal heating performance and energy efficiency for years to come. Whether you're in Southampton, Portsmouth, Winchester, or any other part of Hampshire, you can rely on Cinergi for top-quality boiler installations and exceptional service.

West Sussex

Cinergi provides professional boiler installation services to meet the heating needs of residential and commercial properties throughout West Sussex. Our team of skilled and Gas Safe registered technicians is committed to delivering reliable and cost-effective heating solutions tailored to your specific requirements. Whether you're in Crawley, Worthing, Chichester, or any other area of West Sussex, Cinergi is your trusted partner for all your boiler installation needs.


Cinergi offers comprehensive boiler installation services in Wiltshire, delivering top-quality heating solutions for homes and businesses across the county. From Swindon to Salisbury and everywhere in between, our experienced team ensures that your boiler is installed with precision and care, providing reliable and efficient heating for your property. With Cinergi, you can trust that your heating needs are in good hands.


For residents and businesses in Dorset, Cinergi provides professional boiler installation services to keep your property warm and comfortable year-round. Whether you're in Bournemouth, Poole, Dorchester, or any other part of Dorset, our skilled technicians will install your boiler with expertise and efficiency, ensuring optimal heating performance and energy efficiency.


Cinergi is your go-to partner for new boiler installation in Somerset, offering reliable and efficient heating solutions for residential and commercial properties across the county. From Taunton to Yeovil and beyond, our experienced team ensures that your boiler is installed to the highest standards, providing reliable and cost-effective heating for your property.

Is it time to make the switch to a greener heating system?

As the world grapples with the challenges of climate change, and home and business owners face growing energy costs, many are left wondering whether it’s time to ditch the boiler.

For the majority of households and businesses, an air source heat pump is the natural progression from a boiler. Heat pumps are an efficient and eco-friendly solution, converting outside air to provide heat and hot water, even in cooler climates.

To find out more, visit our air source heat pump and ground source heat pump pages.

Why use Cinergi for your domestic boiler

You can rely on the experts at Cinergi for honest, independent advice, quality workmanship and excellent customer service. We offer free, no-obligation consultations to understand your unique requirements, and then we can offer our professional recommendations as to what is right for your home.

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Frequently Asked Questions about boiler installations

The duration of a boiler installation can vary depending on factors such as the type of boiler, the complexity of the installation, and any additional work required. In general, a straightforward boiler replacement can typically be completed within a day, while more complex installations or upgrades may take longer.

Our team at Cinergi works efficiently to minimise disruption to your home or business during the installation process, providing timely and professional service to ensure your new boiler is up and running as quickly as possible.

New boiler installation can be a significant undertaking, particularly if it involves replacing an older boiler system or upgrading to a different type of boiler. The process typically involves assessing your heating needs, removing the old boiler (if applicable), installing the new boiler, and ensuring that the system is properly connected and functioning correctly.

While the size of the job can vary depending on the specifics of your installation, our experienced technicians at Cinergi are well-equipped to handle boiler installations of all sizes with expertise and efficiency.

Yes, installing a new boiler can improve the warmth and comfort of your home by providing a more efficient and effective heating system. Newer boilers are designed to operate more efficiently than older models, which means they can heat your home more effectively while consuming less energy.

Additionally, upgrading to a new boiler allows you to take advantage of modern heating technologies and features, such as programmable thermostats and zoning controls, which can further enhance comfort and efficiency.

At present, there is no legislation to say you have to replace an existing gas boiler. However, gas boilers will be banned from new-build properties from 2025, with heat pumps likely to be the most common replacement.