NEW BOILERS IN SOUTHAMPTON

Choosing a New Boiler in Southampton

A new boiler is a big purchase and one you will live with for many years. This page explains when a new boiler makes sense, how to choose the right type for your home and what happens between your first quote and the day your heating comes back on.

Harrison Heating has been fitting boilers for homeowners in Southampton and across Hampshire since 1982. Every new boiler installation in Southampton is carried out by Gas Safe registered engineers. If you already know you want to swap your current boiler for a similar one, our boiler replacement page covers that in more detail.

New Worcester Bosch combi boiler fitted on a kitchen wall

When Is It Time for a New Boiler?

People usually start looking at new boilers for one of these reasons:

  • The boiler is getting old and parts are harder to find
  • Breakdowns are becoming more frequent and the repair bills are adding up
  • Heating bills feel high for the size of the home
  • You have moved into a property and the boiler does not suit the way you live
  • You are extending, adding a bathroom or converting the loft, and the current boiler cannot keep up

If you are not sure, ask us. Sometimes a boiler repair is the sensible option, and we will tell you when it is.

Combi, System or Regular: Which New Boiler Do You Need?

Combi boiler. A new combi boiler heats water straight from the mains when you turn on a tap, so there is no hot water cylinder and no tank in the loft. It suits most flats and small to medium homes with one bathroom, and it frees up the cupboard space a cylinder would take. The trade-off is that two hot taps running at once share the flow.

System boiler. A system boiler works with a hot water cylinder, usually in an airing cupboard, but does not need a tank in the loft. It is a good fit for homes with two or more bathrooms where several people need hot water at the same time.

Regular boiler. Also called a conventional or heat-only boiler, it uses a cylinder plus a cold water tank in the loft. It is often the right choice for older properties whose pipework was designed around it.

You do not need to work this out on your own. We look at the size of your home, the number of bathrooms and how your household uses heating and hot water, then recommend a boiler type and size that fits.

Floor-standing heating unit next to a hot water cylinder

Accredited Worcester Bosch, Vaillant, Viessmann and Glow-worm Installers

We are accredited installers for Worcester Bosch, Vaillant, Viessmann and Glow-worm, four of the best known boiler manufacturers in the UK. Each new boiler comes with a manufacturer-backed warranty.

We explain the differences between models in plain terms and recommend one based on your home and budget, not on pushing a particular brand.

Worcester Bosch boilers in white and black finishes

What a New Boiler Installation Includes

  1. Quote. Start with our instant boiler quote for an idea of cost, or call us to talk it through.
  2. Survey. An engineer visits to look at your existing heating system, the layout of your home and how much heating and hot water you need.
  3. Recommendation. You get a clear recommendation and price, with the reasons behind it, so you can compare options properly.
  4. Installation. We remove the old boiler if there is one and fit the new one, keeping the work area clean and tidy.
  5. Commissioning. The boiler and heating system are tested and set up before we leave.
  6. Handover. We show you how to use your new boiler, register the manufacturer's warranty and leave you the compliance paperwork.
Gas Safe engineer installing a new wall-mounted boiler

Warranty

Every installation we carry out comes with a 2 year warranty covering parts and labour. On top of that, new boilers come with a manufacturer warranty of up to 10 years, depending on the model.

To keep the manufacturer warranty valid, the boiler needs to be registered and serviced every year. We register the warranty for you when we fit the boiler, and we offer annual boiler servicing across Southampton. Full details are on our boiler warranty page.

Glow-worm Energy combi boiler

Areas We Cover


We fit new boilers in Southampton and the surrounding area, including Eastleigh, Chandler's Ford, Totton, Romsey, Hedge End, Winchester, Portsmouth and Fareham. If you live nearby but your town is not listed, give us a call.

New Boiler FAQs


How long does it take to fit a new boiler?

It depends on the job. Fitting the same type of boiler in the same place is quicker than changing boiler type or moving it to another room. We give you a timescale with your quote.

Can I switch to a combi boiler?

In many homes, yes. We check your hot water demand and the number of bathrooms first, and we tell you if a combi is not the right choice.

Which boiler brand is best?

No single brand is right for every home. As accredited installers for Worcester Bosch, Vaillant, Viessmann and Glow-worm, we can recommend the model that suits your property.

Do I need to service my new boiler?

Yes. An annual service keeps your boiler safe and efficient, and it is usually required to keep the manufacturer warranty valid. We offer annual boiler servicing across Southampton and Hampshire.

What warranty do I get?

Our installation work is covered by a 2 year parts and labour warranty, and the boiler itself comes with a manufacturer warranty of up to 10 years, as long as it is registered and serviced every year.

How do I get a price for new boilers in Southampton?

Use our instant boiler quote calculator, or call 02380 000050 to arrange a survey.

Thinking about a new boiler? Get in touch today.

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Get a Quote for Your New Boiler


Call us on 02380 000050, send a message through our contact form or try the instant boiler quote calculator. If you would rather talk things through first, we are happy to answer questions before you book anything.

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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.