There are three main types of boiler – combi, system and conventional – each with their own pros and cons. We can advise which one will suit you best, or you can take a look at this quick guide.

What is a combi boiler?
Combi boilers are the most popular type of boiler in the UK. A combi boiler provides unlimited heat and hot water right when you need it, with no need for cold water storage tanks or cylinders. They’re suitable for almost any home, but they’re best for houses where lots of people won't require a lot of hot water at the same time, as the water pressure might be reduced if you run hot water from more than one tap at a time.

What is a system boiler?
Also sometimes referred to as a sealed system, a system boiler requires a water cylinder, which most people place in an airing cupboard. There’s no need for a water tank and it enables you to get hot water from multiple taps at the same time. However, it doesn’t provide instant hot water – once the hot water has run out, you’ll have to wait for it to reheat. This boiler is best for homes that need to have hot water in more than one place at the same time.

What is a conventional boiler?
Also known as an open vent or regular boiler, a conventional boiler requires a cylinder, a tank and a feed and expansion tank. Like the system boiler, once the hot water has run out, you’ll have to wait for it to reheat, but it’s suitable for homes that need to have hot water in more than one place at the same time. Conventional boilers are often found in older homes and today have been made almost obsolete by combi and system boilers.

Which brand of boiler is the best?
There’s a great deal of choice out there and prices can vary widely. Manufacturer's warranties can play a big part in decisions too. Think about your budget and speak to an expert gas engineer to discuss the available options.

How long should a boiler last? 
Most boilers should run for around 10 to 15 years. Getting a regular boiler service is the best way to ensure it stays in good working order, running safely and efficiently for as long as possible.


How much does a boiler cost?
Boilers can cost anything from £500 to £2000 but it’s important to remember there may also be additional costs depending on the condition of your existing radiators and pipework. The mains water pressure, flue, filter, roofing, and any potential electrical work also needs to be factored in, but rest assured the price we quote you will always take these things into consideration.

How often should a boiler be serviced?
We recommend getting your boiler serviced by a professional gas engineer once a year. Failure to do so will most likely result in your warranty being invalidated and can turn small problems into large, costly ones.

How do you know how efficient a boiler is?
All modern boilers come with an Energy Star rating; a well-rated boiler will run much more efficiently than a poorly-rated boiler which will prove more costly in the long-run.