CENTRAL HEATING

Central Heating Installations Gas, LPG & Oil - Hampshire & Southampton

A properly designed central heating system is essential for comfort, efficiency and long-term reliability. Whether you are installing heating for the first time or upgrading an older system, correct design and installation make a significant difference to performance and running costs.

At Harrison Heating, we provide complete central heating installation services for homes, landlords, commercial properties and churches across Southampton and the surrounding areas.

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Complete Central Heating System Installation

We install full central heating systems from the ground up, as well as upgrades and replacements of existing systems.

Our services include:

  • New central heating installations
  • Replacement of outdated or inefficient systems
  • Full pipework and radiator replacement
  • Partial upgrades and system improvements

Each installation is designed specifically for the property, taking into account layout, usage and heating demand.

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Heating Systems & Fuel Types

We install central heating systems powered by:

  • Gas boilers
  • LPG boilers
  • Oil-fired boilers

All systems are installed by Gas Safe registered engineers and fully compliant with current UK regulations.

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What’s Included in Our Central Heating Installations:

A typical installation may include:

  • New boiler installation (where applicable)
  • Radiators (panel radiators, towel rails, designer radiators)
  • Pipework installation or replacement (copper or plastic)
  • Thermostats and heating controls
  • Smart heating controls (where requested)
  • Zoned heating systems for improved efficiency
  • Full system filling, testing and commissioning

We ensure every system is balanced, tested and correctly commissioned before handover.

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Designed for Efficiency & Long-Term Performance

Every central heating system we install is:

  • Correctly sized for the property
  • Designed with heat demand and efficiency in mind
  • Configured for reliable, even heat distribution
  • Built to meet current and future heating requirements

This approach helps reduce energy waste, improve comfort and support lower running costs.

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Central Heating for Homes, Landlords & Commercial Properties

We install central heating systems for:

  • Domestic homes and apartments
  • Rental properties and HMOs
  • Commercial buildings and offices
  • Churches and community buildings
  • Renovation projects and new builds

We understand the importance of reliable heating in public and occupied buildings, including churches where consistent comfort is essential for congregations and visitors.

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Our Installation Process

  • Initial assessment Review of the property, existing system and heating requirements.
  • System design & recommendations Clear explanation of suitable system options.
  • Professional installation Careful, tidy installation carried out to a high standard.
  • Testing & commissioning Full safety and performance checks.
  • Handover & documentation User guidance and compliance documentation provided.

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Why Choose Harrison Heating?

  • Gas Safe registered engineers
  • Experience with full and partial heating installations
  • Domestic, landlord, commercial and church clients
  • Systems designed specifically for each property
  • Honest advice and professional workmanship
  • Local service across Southampton and surrounding areas
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Get in touch to arrange an assessment or request a quotation

CALL US NOW

Get a Quote for Central Heating Installation in Southampton


If you are planning a new central heating installation or upgrading an existing system, contact Harrison Heating today.

We provide clear advice, tailored system design and professional installation, suited to your property and heating needs.

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Frequently Asked Questions

If this happens, it might be a result of low pressure or blockage in the system, which is restricting the flow of water. In some cases, there could be a fault with a closed valve, thermostat or aa pump causing the water not to circulate properly. We recommend contacting us for assistance in diagnosing and repairing the fault by a Gas Safe registered engineer.
The most common causes of leaks and boiler dripping water are faulty internal components, this includes but is not limited to issues with corrosion, broken pressure valves, pump seals, or loosen pipe connections. We recommend calling out our Gas Safe registered engineer, who will diagnose and fix the problem for you and stop any potential dangers. You should never try to fix a boiler yourself, always call out for professional help.
Kettling sound from your boiler ( similar to a boiling kettle ) is usually caused by limescale or sludge buildup inside the system. It often happens in areas with hard water. The deposits build up in your boiler or pipes can block or restrict the flow of water inside the system, which can result in overheating and weird noise. It is best to treat this as soon as possible because it might result in more severe boiler damage and higher costs if your boiler needs replacing. We recommended calling our team as soon as you notice kettling sounds from your boiler. Our engineer will drain your central heating system and remove limescale and sludge buildup. For more information on this method, please visit our Power Flush section.
Worrying noises from the boiler are usually caused by low water pressure, a faulty pump or air buildup in the system. The type of sound in your system can narrow down the source of the problem. Banging noise could be a result of imminent pump failure, and this happens most often in old systems that have not been serviced regularly. We highly recommend contacting us to book our Gas Safe registered engineer for a professional diagnose of the problem as soon as possible.
The blue flame that always stays lit is called a pilot light. If this pilot light keeps turning off, it will stop your boiler from working. It can be caused by a broken thermocouple, which would stop the supply of gas to your boiler. Sometimes also the problem could be a draught blowing the pilot light out or a deposit built up in the pilot light. Always remember that you should never carry out any work on your central heating system. There is one thing that you could check yourself before calling out an engineer: Check if your other gas appliances are working and that your gas stopcock is on. You can always give us a call, and we will be more than happy to help you.
The most common causes for this to happen are faulty airlocks, diaphragms, motorised valves, thermostat or low level of water in the system. Your heating system might require a new part fitted to be working correctly again. Give us a call today for professional advice. If necessary, we will book a Gas Safe registered engineer for a professional diagnose of the problem as soon as possible.
It is straightforward to check the pressure of your central heating system; just take a look at the pressure gauge on your boiler. Low pressure ( below 1 ) will cause your central heating system not to work properly. It can be a result of a few potential reasons. Some of the reasons for this to happen could be a water leak in the system, recently bled radiators or a faulty pressure relief valve. We recommend contacting us for assistance.
All condensing boilers ( combi, system or regular ) have a condensate pipe transporting excess water away from the boiler. During winter it is common for the water to freeze and cause a blockage. If this happens, your boiler will most probably display a warning or a fault code. Feel free to give us a call; we will be happy to assist.
It might be a sign of a faulty thermostat when the heating is turning on and off when it is not supposed to. If your thermostat starts to malfunction or loses its accuracy, it will probably need to be replaced. Give us a call today for professional advice.
If some of your radiators are not getting hot, then they might need balancing. This procedure can also be done without the help of an engineer, but only if you feel confident doing it. If only the bottom of your radiator is getting hot then it might need to be bled, it is not a difficult task, and it does not require an engineer. In some other cases, there could be a build-up of sludge or air in your central heating system. Our professional engineers can remove this build-up by a process called Power Flush, and this is something that you should not try yourself.
All of our installers are fully trained, and qualified Gas Safe registered professionals.
We will recommend the best possible boiler for your needs, in terms of brands we mostly recommend Valliant and Worcester Bosch.
Harrison Heating has a team of professional engineers covering all of Hampshire. Most of our work so far has been carried out in the following areas: Southampton, Eastleigh, Fareham, Chandlers Ford, Whiteley, Winchester, Portsmouth, Winchester, Hedge End, West End, Botley, Romsey, Totton, Lyndhurst, New Forest, Hythe, Marchwood, Netley, Gosport, Twyford, Hamble, Holbury, Wickham, Titchfield, Nursling, Ringwood, Salisbury, Cosham, Waterlooville, Fair Oak and Lee-on-the-Solent.
Yes, we provide free quotes without obligation from your side to accept our quotation.
To give you the best and optimal solution we will need to know few details. For example, we will ask how many rooms and bathrooms you have currently or if you are planning any future extensions of your house.
In most cases, we can install your new boiler in the next working day. It depends on the current workload, so please give us a call as soon as possible if you are in a rush.
It usually takes one day to fit a new boiler by our professional installation team.
It is required by law that all servicing and gas safety checks are made by a Gas Safe registered engineer. It is also a condition of the warranty if your boiler is still under one.
We will do all possible safety checks, inspection and test all critical components to make sure your boiler runs safely, reliably and efficiently.
Please feel free to use our website to leave us a short feedback message. We are always happy to hear from customers about the outcome of our work. You can also read other customers reviews in the feedback section of our website.
Underfloor heating can be installed in most houses under almost any type of flooring. It gives you the option to have different zones heated and controlled independently. It comes very convenient in terms of managing heat distribution depend on which rooms are being used at the time.
Of course, you can! It is even recommended if the room is big enough, the area of heating can be split into sections. This approach works great with open-plan areas like kitchen diners.
Underfloor heating gives you the ability to warm up naturally cold ceramic or stone floors efficiently. It distributes the heat throughout the heated areas more equally compared to the radiators. Once installed, the underfloor heating requires less maintenance compared to central heating.
The underfloor heating gives you more control, increased comfort, better heat distribution, and it costs less to run. Underfloor heating provides a cleaner radiant heat causing less discomfort to asthma and dust allergies sufferers.