A new boiler typically costs £1,800 to £4,000 installed and takes one to two days to fit. This guide explains the main boiler types, how to choose the right size, why Worcester Bosch boilers carry up to 12 year warranties, and how finance can spread the cost. All gas work must be carried out by a Gas Safe registered engineer.
A new boiler is one of the bigger purchases you will make for your home, and it is not one you make very often. Get it right and you have a warm house, reliable hot water, and lower bills for the next decade or more. This guide walks you through the choices in plain English, from the different boiler types to what actually happens on installation day, so you can plan the job with confidence. We fit boilers across Southampton and the wider Hampshire area, and we are always happy to talk it through before you commit to anything.
Types of Boiler
There are three main types of boiler, and the right one depends on the size of your home, how much hot water you use, and the space you have available.
- Combi boilers (combination): The most popular choice by a good margin. A combi heats your home and provides hot water on demand, straight from the mains, without a separate hot water cylinder or a cold water tank in the loft. That means less clutter, more cupboard space, and a tidy install. Ideal for flats and small to medium homes where one bathroom is the norm.
- System boilers: These work alongside a hot water cylinder, so hot water is stored ready to use. They suit larger homes and busy households where two bathrooms might be running at once. You get a steady flow to several taps and showers at the same time without the drop in pressure you can get from a combi.
- Regular boilers (heat only): The traditional setup, needing both a hot water cylinder and a cold water tank in the loft. We tend to fit these where a property already has the pipework for it and the household prefers to keep the same system, often in older or larger homes.
If you are not sure which suits your home, that is exactly what our survey is for. We look at your existing setup, your water pressure, and how your household actually uses hot water, then recommend the type that will serve you best.
Getting the Sizing Right
Bigger is not better when it comes to boilers. A boiler that is too powerful for your home wastes gas and money. One that is too small will struggle to keep up on cold mornings and when several taps are running. Correct sizing, measured in kilowatts, is one of the most important parts of a good installation.
Sizing comes down to a few things: the number of radiators, the size and age of your property, how well insulated it is, and the number of bathrooms. As a rough guide, a two bed flat with one bathroom might need a 24 to 28kW combi, a typical three bed house around 28 to 34kW, and a larger home with two or more bathrooms 35kW and up, or a system boiler with a cylinder. We do the calculation properly rather than guessing, so your boiler is matched to your home and runs efficiently from day one.
Thinking About a New Boiler?
Call Becketts on 07963 314937. We provide free, no-pressure quotes and honest advice on boiler installation across Southampton and Hampshire.
Call for a Free QuoteWhy We Fit Worcester Bosch
We fit boilers from a range of manufacturers, but for most homes we recommend Worcester Bosch, and there are good reasons for that.
- Reliability: Worcester Bosch boilers are consistently rated among the most reliable on the market and regularly come out top in independent trade surveys. When you rely on your heating every winter, that track record matters.
- Accredited installer: As a Worcester Bosch accredited installer, we can offer extended manufacturer warranties of up to 12 years on qualifying models. That level of cover is only available when the boiler is fitted by an accredited engineer, which gives you real long term peace of mind.
- Parts and support: Parts are widely available and the manufacturer support is excellent, which means faster repairs and less time without heat in the rare event something goes wrong.
- Efficiency: Modern Worcester Bosch condensing boilers are highly efficient, which keeps your running costs down and helps recover the cost of the new boiler through lower bills over time.
We will always give you an honest recommendation for your home and budget, but the combination of reliability, the extended warranty, and strong support is why Worcester Bosch is our first choice for most installations.
What Installation Day Involves
A professional boiler installation is a planned, tidy process. Here is what you can expect from start to finish.
- Pre-installation survey: Before anything is ordered, we visit to survey your existing system, check your property is suitable, and agree the right boiler and location. This is when you get a clear, fixed price with nothing hidden.
- Installation day: Most installations take one to two days. We remove the old boiler safely, prepare or upgrade the pipework, fit the new boiler and controls, and connect everything up. A straightforward like for like combi swap is often done in a single day.
- Commissioning and testing: Before we finish, the system is commissioned properly: pressure tested, safety checked, and every control verified. We flush the system where needed and often fit a magnetic filter to protect your new boiler from sludge and keep it running well.
- Paperwork and handover: You receive your Benchmark installation record, Gas Safety documentation, and your warranty registration. We walk you through how to run the boiler and set the controls, and we clear up and protect your floors so we leave your home as we found it.
Cost and Finance
As a guide, a new boiler supplied and fitted typically costs between £1,800 and £4,000 depending on the type of boiler, the model you choose, and whether any extra work is needed such as new pipework, a system flush, or moving the boiler location. Most installations take one to two days.
- Combi installation: Usually the most cost effective option, especially on a like for like replacement.
- System boiler installation: A little more involved as it works with a hot water cylinder.
- Additional work: Removing the old boiler, upgrading pipework, a magnetic filter, or relocating the boiler can affect the final figure. We set all of this out clearly in your quote.
We know a new boiler is a significant outlay, so finance is available to help spread the cost into manageable monthly payments rather than paying it all up front. It is a straightforward way to get a warm, efficient home now and pay over time. Just ask us about it when we quote and we will explain the options.
Whatever route you choose, remember that all gas work must by law be carried out by a Gas Safe registered engineer. It is not optional. It protects your safety, your warranty, and your insurance. I'm Gas Safe registered with over 16 years in the trade, so you can be confident the job is done right.
Frequently Asked Questions
Most installations take one to two days, depending on the type of boiler and whether any extra work is needed. A straightforward like for like combi swap is often completed in a single day, while a system boiler with a new cylinder, or a change of boiler location, may take a little longer. We give you a clear timescale when we quote.
As a guide, a new boiler supplied and fitted usually costs between £1,800 and £4,000. The final price depends on the boiler type, the model, and any additional work such as new pipework or a system flush. We provide a free, fixed quote with no hidden charges, and finance is available to spread the cost.
Because we are a Worcester Bosch accredited installer, we can offer extended manufacturer warranties of up to 12 years on qualifying models. That level of cover is only available when the boiler is fitted by an accredited engineer. Keep your installation paperwork safe, as you will need it to register and support the warranty.
Yes. We offer finance so you can spread the cost into manageable monthly payments rather than paying up front. It is a simple way to get a warm, efficient home now and pay over time. Just ask us about it when we quote and we will talk you through the options.
