Boiler Types Explained
Deciding which boiler will make an efficient and practical fit with your home and lifestyle can be confusing.
The information below explains the main system types, how they work, their advantages and what kind of homes they work best in.
A combination or ‘combi’ boiler is both a high efficiency water heater and a central heating boiler in a single compact unit. Combi boilers heat water directly from the mains when you turn on a tap, so you won’t need a hot water storage cylinder or a cold water storage tank in the roof space.
- Compact sizes make combi boilers perfect for smaller properties
- Ideal where there is little or no loft space
- No need for a hot water cylinder
- No cold water storage tank
- No risk of loft pipework freezing
- Less pipework in the home makes installation typically cheaper
System boilers require a cylinder for storing hot water, however the major heating and hot water system components are built into the boiler itself, making it quicker and easier to install. In addition, there is no need for a tank in the loft, so it can be an option in a home with little or no loft space or where the space is earmarked for a conversion.
- Ideal for homes with more than one bathroom
- Constant supply of hot water to any number of taps at the same time
- No need for a loft tank, freeing up space and eliminating worries about leaks or frost
- Economical to run
- Built-in components makes installation quicker and neater
Regular boilers (sometimes known as traditional, conventional or heat only boilers) are ideally suited to homes that already have a traditional heating and hot water system which is linked to a separate hot water cylinder. These boilers also need a cold water storage tank in the loft to feed the hot water cylinder as well as a tank that maintains the water level of the central heating system.
- Perfect for homes where a lot of hot water is used at the same time
- Ideal where there are two or more bathrooms
- A good option in areas where water pressure is low
- Compatible with solar water heating systems for a lower carbon footprint and lower energy costs