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Boiler Installation Southampton

Fixed-price boiler installation in Southampton (SO15, SO16 and SO17), serving Shirley, Bassett, Portswood and Freemantle. Start with an online quote for boiler replacement today.

Next-day installation slots
Up to 12-year warranty
Gas Safe registered engineers
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Reliable Boiler Installation & Replacement in Southampton

Southampton’s Victorian terraces in Portswood and Freemantle, interwar semis in Bassett and Shirley, and dockside flats near Ocean Village shape the boiler installations we carry out across SO15, SO16 and SO17. Many boilers sit in tight kitchen cupboards, so we survey flue routes, access and shared walls first and avoid costly relocations.

Southampton sits on Southampton Water, so salt-laden winds and a hard, chalk-based water supply from Southern Water both affect boilers. On every installation in SO18 and SO19 we flush the system, fit a magnetic filter, use durable flue terminals and recommend scale protection, so your new boiler stays efficient for years.

Whether you’re replacing an old boiler in a Highfield student house, a Shirley terrace or a Bitterne semi, our Gas Safe engineers commission every installation and register the warranty, so your new Southampton boiler runs efficiently from day one.

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Why Replace Your Old Boiler in Southampton

Many of the boilers we replace in Southampton are 12 to 15 years old or more, fitted when terraces were converted and rarely upgraded since.

Solid-wall Victorian terraces and older dockside homes lose heat quickly, so an inefficient boiler burns far more gas to keep rooms warm through damp, windy south coast winters.

Highfield and Portswood have a large student rental market, so heavily used boilers in SO17 are among the most common breakdown call-outs we attend each winter.

Salt-laden air around Woolston, Weston Shore and Sholing corrodes external flues and fittings, so we specify durable components and check exposed rear walls carefully on every installation.

Many older Southampton terraces still use regular boilers with loft tanks that can freeze or leak in cold snaps. Switching to a combi removes those tanks, frees up loft and cupboard space and gives instant hot water whenever you turn on the tap.

A modern A-rated boiler uses less gas, works with smart heating controls and carries a manufacturer warranty of up to 12 years, keeping Southampton households warmer with fewer repairs.

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Our Best-Selling Boiler Packages in Southampton

Browse our most popular boiler installation packages, selected to suit different property sizes, hot-water requirements and budgets in Southampton.

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Areas We Cover

We provide home energy installations nationwide, helping families across the UK upgrade their heating and energy systems. With next-day installation slots often available, getting started couldn’t be easier.

We have major hubs in Wales, London and the Midlands. Our accredited engineers deliver a fast, reliable service wherever you live. You can get a quote online today using our streamlined system, and we’ll match you with an engineer in your local area.

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How Much Does a New Boiler Cost in Southampton?

In Southampton, a like-for-like combi replacement usually costs between £1,800 and £3,500 fully installed, depending on the brand and output. This covers most terraces in Portswood, Freemantle and Shirley, where the new boiler stays in the same position.

For a system or regular boiler, found in larger homes in Bassett, Highfield and Bitterne Park, expect around £2,200 to £4,000, particularly if the cylinder or loft tank also needs replacing.

Converting from a tank-fed system to a combi, removing a back boiler or working in a dockside flat or listed building with restricted access typically costs £3,000 to £5,000. EazyHeat provides a fixed, itemised quote before any work begins.

Your Southampton quote shows every cost clearly, from the boiler and flue to controls, labour and commissioning, and because the price is fixed before work starts, there are no surprises when the installation is finished.

Choosing the Right Boiler When Replacing Your Old Gas Boiler in Southampton

When it comes to replacing an existing gas boiler, you have several options depending on your home, lifestyle, and budget in Southampton.

Combination Boilers (Combi) Southampton

  • Heat your central heating and hot water directly from one compact unit.
  • No separate hot water cylinder needed.
  • Best suited to Portswood or Freemantle terraces and households with one bathroom.
  • Highly energy-efficient, with minimal heat loss.

Ideal for: compact terraces, flats and small to medium homes in areas like Freemantle and Ocean Village.

System Boilers Southampton

  • Take water directly from the mains and store it in a hot water cylinder.
  • Provide a constant supply of hot water to multiple taps at once.
  • More suited to larger Bassett or Bitterne Park homes with higher hot water demand.

Ideal for: Families with multiple bathrooms in larger SO16 and SO18 homes and households with heavy daily hot water use.

Regular Boilers (Conventional) Southampton

  • Also known as traditional or heat-only boilers, still common in older Southampton terraces and semis.
  • Use a separate hot water cylinder and cold water storage tanks, typically in the loft space.
  • Best for homes with an existing tank-fed setup in Shirley or Bassett.

Ideal for: Larger detached homes in SO16 or SO17 already configured for a regular boiler, or with high hot water needs.

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Flexible ways to pay

Choose from a range of convenient payment options, including flexible finance plans or paying for your installation in full.

Flexible Monthly Repayments

Representative APR 11.9% (fixed)

Spread the cost of your installation over a longer repayment term with manageable monthly payments.

As long as your scheduled monthly payments are maintained, you can make additional payments at any time. Overpayments may help reduce the total interest charged and shorten the length of the agreement.

You will also receive the additional protections provided by the Consumer Credit Act 1974.

Representative example: Cash price £2,000. No deposit required. Total amount of credit £2,000. Interest rate 11.9% per annum fixed. Representative APR 11.9%. Agreement term 60 months. 60 monthly payments of £43.78. Total amount repayable £2,627.08.

Cash, Card or Bank Transfer

Pay for your installation in full

Choose from several convenient ways to pay for your installation:

  • Make an online bank transfer to Eazy Heat Ltd. using the bank details shown on your invoice. This is our preferred payment method.
  • Make a card payment over the phone through our office.
  • Make a cash payment after your installation has been completed.
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We act as an introducer appointed representative of Vendigo, we’ll never quote you real time rates. We’ll simply send you a link to apply for finance from them.

EAZY HEAT LTD (FRN: 1020736)] is an Appointed Representative of Koze Group Ltd, a credit broker, not a lender. Koze Group Ltd is authorised and regulated by the Financial Conduct Authority (FRN 811281) and registered in England (08357963). We offer finance products from a panel of lenders. Credit is subject to age and status.

Why Choose EazyHeat?

At EazyHeat, we don’t just install systems. We provide a complete, customer-focused experience that puts speed, simplicity, and service first. Homeowners across the UK choose us for:

Fast Turnaround Times

Choose your install date, and we’ll do the rest. No drawn-out processes or unnecessary delays.

12-Year Warranty as Standard

All boiler installations come with a market-leading 12-year parts and labour warranty.

Highly Rated Service

We’re proud of our reputation. From initial quote to final handover, we deliver consistently top-rated service across the UK. That’s why we’re rated Excellent on Trustpilot!

Gas Safe Registered Installers

Every job is carried out to the highest safety standards by our fully qualified, experienced engineers.

UK-Wide Coverage

No matter where you’re based, we’ve got expert installers ready to help – from major cities to rural towns.

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What Our Customers Are Saying

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Boiler Installation FAQs

Yes. Victorian terraces across SO14, SO15 and SO17 are a regular part of our work. We plan the flue route through a rear wall or roof, size the boiler for a compact kitchen and protect your home throughout, keeping disruption to neighbours to a minimum.

Yes. Shared houses in Highfield and Portswood need reliable boilers with clear commissioning records, and landlords must arrange annual gas safety checks. We fit robust boilers, provide paperwork for letting agents and explain the controls to tenants, so the property stays compliant and warm all winter.

Salt-laden air can corrode external flue terminals and fittings around Woolston and Weston Shore. We specify durable, corrosion-resistant components, position terminals away from the worst exposure where possible and recommend annual servicing, which also helps protect your manufacturer warranty.

A like-for-like combi swap in a typical Southampton terrace or semi takes 4 to 6 hours. Removing a back boiler or converting a larger Bassett house from a regular system usually takes a full day, occasionally running into the next morning for commissioning. We tidy up fully and explain your new controls before we leave.

Alongside Southampton city centre, we install boilers in Portswood, Shirley, Freemantle, Bassett, Bitterne, Woolston and Sholing, as well as Eastleigh and Totton. If you are just outside the SO postcodes, we also cover nearby Portsmouth, Winchester and Salisbury. We regularly work across Hampshire.

Speak With Our Boiler Experts

For personal guidance about your property or installation, call EazyHeat on 0330 133 5170.

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