A combi boiler is a type of boiler that combines both a central heating system and a hot water system in one unit. This type of boiler is a great choice for homeowners who want to save space and money. With a combi boiler, there is no need for a separate hot water cylinder or cold water storage tank, as the boiler can provide both hot water and central heating from one unit. This makes it a very efficient and cost-effective solution for heating and hot water needs. The combi boiler is also very easy to install and maintain, making it a great choice for those who want to save time and money. Additionally, the combi boiler is very reliable and can provide hot water on demand, making it a great choice for busy households.