If you’re looking for a new boiler installation in East Sussex, West Sussex or Surrey, County Plumbers Ltd offer a second to none bespoke installation service, from the very first phone call, to ongoing servicing and after-care.
Gas safe registered
All of our engineers are gas safe registered (formally known as CORGI registered) with years of experience and all of the necessary up-to-date qualifications needed to fit gas boilers.
Combination boiler specialists
We’re combination boiler specialists, but we also fit regular boilers, heat only boilers and system boilers too. Check out our FAQs below to learn about the differences between these three types of boiler. We’re also one of very few companies in Sussex who are qualified to install swimming pool boilers.
Vaillant , Glow-worm, Baxi, Worcester and Ideal boilers
Quality boiler installations
The quality of the boiler installation is the most important part of the job. It’s incredibly important to securely make the water and gas connections, to fit the flue correctly and fully flush the system until it reaches the suitable turbidity standards.
Boiler manufacturers have reached a pretty level playing field now where all the boilers are very much of the same quality and most of the companies outsource all of the parts, so it really just boils down to suitability of the boiler manufacturer that you like and the length of the warranty or guarantee that comes with it, which typically range from two to twelve years.
How much is a new boiler?
This question is a bit like asking ‘how much is a new car?’ There’s no simple answer because there are several variables, for example, type of boiler (combi, system or regular) as well as the make and model of the boiler.
So in addition to the costs, here is some basic information about the different types of boiler found in households nowadays and which our experienced engineers are fully qualified to install and repair.
Note: the costs shown below are indicative only and do not include the installation fee. For an accurate quote from us, please use our boiler installation quoting tool.
Prices start at approx £600 for a budget combi boiler, £900-£1200 for a mid-range combi boiler and £1000-£2000 for a premium model. Which one you’ll need depends on the number of radiators and bathrooms in your house, as it is these factors that determine the size of the boiler.
At County Plumbers, we do a lot of combi boiler installations as they are simply the most popular boiler choice for a regular household. They ensure hot water on demand and also control the central heating. There is no need for a hot water cylinder or a storage tank so you just need to find space for the compact rectangular casing which typically fits inside a wall cupboard in the kitchen, bathroom or a bedroom.
Prices start at around £500 for the entry level and can go up to £1600 for a premium model.
These require a large cylinder for storing the hot water (often located in the airing cupboard) and also a storage tank for the cold water (often located in the attic or loft for the required gravity).
Regular boilers work by feeding hot water directly to the radiators from the hot water storage cylinder for on-demand use. If the hot water runs out, you’ll need to wait for it to heat up again. Unlike combi boilers, water flow rates aren’t reduced when two or more outlets are being used at the same time, so they are often a good choice for larger homes or businesses where there is high demand for hot water from several outlets at the same time.
Budget models of system boilers start at around £600, a mid-range will cost £900-£1300 and a premium model between £1300 – £2500.
System boilers are really an upgraded version of the regular boiler, so again, are often the preferred choice for homes or businesses where there is a high demand for hot water. Like regular boilers, they do require a cylinder with cast iron heat exchangers for heating and storing the hot water but as all the parts like the pump and expansion vessel are internal and they use mains supplied water, meaning that they don’t need a storage tank.
What is a combi boiler?
The combi boiler is without doubt the type of boiler we are most often asked to install. ‘Combi’ is short for ‘Combination’ because the hot water cylinder and cold water storage tank found in a regular traditional central heating system are all combined in just one compact casing unit. This is a huge bonus for smaller homes where any form of space saving is welcome.
Possibly the most important feature of a combi is that hot water is produced on demand (unlike the older style immersion heater which needs to be turned on in advance). The only slight downside is that the water flow is significantly reduced if the boiler tries to provide hot water to two or more places (e.g. showers) at the same time.
How does a combi boiler work?
The water for a combi boiler is supplied directly from the mains cold water feed.
Essentially, a combi boiler senses a request for hot water (for example when a hot tap is turned on) which then switches on the burner inside the boiler, which heats up the water required.
The central heating temperature is controlled by a room thermostat so that if the temperature falls below the desired level (which is set by you) a signal is sent to the boiler to fire up.
It’s worth mentioning that good water pressure from the mains is important with combis. Some people choose an electric shower because they bypass the need to take water from the boiler, meaning that two showers can easily run simultaneously. Power showers cannot be used with combi boilers however, as they need to take water from a hot water cylinder.
How much is a combi boiler?
The answer to this question depends on which make and model of combi boiler you choose. A budget combi boiler of the smallest size is around £600 – £900, with an additional cost for installation by a Gas Safe engineer, like all of our friendly team. The size of boiler you will require for your home depends on factors such as the number of radiators you have and the number of bathrooms. Give us a call or send us an email if you would like specific (free) advice and/or a boiler quote for your home.
Another consideration for the modern homeowner is whether to purchase smart radiator valves (at a cost of around £50 each) and/or a smart thermostat. All boilers come with a free thermostat which will provide you with all the basic functionality you need to operate your boiler, so an upgrade to a smart thermostat (for example a Google Nest) isn’t essential. They do however allow you to control your central heating remotely (potentially saving you energy and money) as they are designed to work with your smartphone or tablet. There are several on the market ranging in cost from £50 to £200.
How long does a combi boiler last?
A new combi boiler is usually guaranteed for at least 5 years although it should last at least 10 years and very often a lot longer. Of course all boilers come with a parts and labour warranty, usually for anything from 5 to 15 years but it’s not unreasonable to assume, the longer the warranty, the better the boiler.
After around 10 to 15 years, a boiler starts to become less efficient so this is when you may start to lose heat and money. There are however several factors that could alter your boiler’s lifespan; boiler servicing certainly plays a part, as does your annual usage which affects its overall wear and tear. If your boiler has needed a lot of repairs or your bills are unexpectedly creeping up, it might be time to consider getting a new boiler. And if you are thinking about extending your home or making significant changes to the layout of your home, you might find your current boiler becomes unsuitable for your needs and needs replacing too.
Who qualifies for a boiler grant?
You may be able to save money by claiming a government grant towards the cost of a new boiler and some may even be entitled to a free boiler under the nationwide ECO (Energy Companies Obligations) scheme.
The largest energy suppliers (e.g. British Gas, EDF, NPower, Scottish Power) are obliged to help make British households energy efficient with the obvious knock-on of reduced energy bills. It’s a scheme which is available to both homeowners and private tenants and is designed to benefit those on the lowest incomes. If you’re on a very tight budget or low wage, you may qualify, so it’s certainly worth checking out but in short, you need to be in receipt of one of the government income related benefits and your current boiler needs to be at least 7 years old.
What size boiler do I need?
There are several factors which need to be considered when determining what size boiler you will need for your home. Our qualified boiler engineers can help you determine the correct size, if you give us a call, or you can use our handy tool which will also provide you with a quote.
Heating and hot water capability and therefore boiler size is measured in kilowatts (kW). The more heating and hot water you need, the bigger the boiler you will require.
In a nutshell it all depends on the size of your house, your household and the number of radiators you have.
As a very rough guide, you’ll need the following power outputs for a combi boiler:
Up to 10 radiators: 24–27 kW (flats, apartments and smaller houses)
10 to 15 radiators: 28–34 kW (medium to large houses with a couple of bathrooms)
15 to 20 radiators: 32–40 kW (larger houses with higher demands)
And for a system or heat only boiler:
Up to 10 radiators: 12–15 kW
10 to 15 radiators: 18–24 kW
15 to 20 radiators: 30–40 kW
Combi boilers need more power because they heat up the hot water instantly. System and heat only boilers do this more slowly via the hot water cylinder so the size of boiler required is determined by the number of bedrooms, the age of the property and insulation levels. Only the heat production needs to be considered, not the hot water production.
How long does it take to install a boiler?
One of our engineers will be able to advise you on the installation time required for your home, as this all depends on the type of installation.
A straightforward installation, for example replacing an old combi boiler with a new one in the same location can usually be completed in 4-6 hours.
If you’re upgrading your existing system boiler that has an external water tank to a new combi boiler, this is going to take longer; usually a couple of days. Your water tank will need to be removed and there will be some pipe work involved too, probably involving the lifting of floorboards.
Some people want to install their new boiler in a different location, perhaps following a house refurbishment or a new extension. This is likely to take at least another half day although much depends on where you want the new boiler to be fitted in relation to your existing system.
In a nutshell, the further the boiler is being moved, the more time, effort and materials it’s going to cost the engineer, especially when you remember that gas pipes are usually hidden away under floorboards and behind walls.
“Richard is very helpful and friendly, and explains everything. Installed a new replacement boiler in 2021, and serviced and pressurised in 2022. Both professionally done, good work.”
“Very professional would recommend to anyone who’s looking for a new boiler installation at a great price. Thanks Richard and the team……”
“Great service! Really impressed with Richard and Jake. They attended promptly as planned, diagnosed the problem quickly and replaced the old boiler all in 24 hours, thank you.
Professional, amiable guys and a good price. Thoroughly recommend.”