There are honestly many types of boilers, combi, regular, & system. While conventional boilers are fed a supply of cold water from the good sized feed & expansion tank in your attic, a combi boiler pulls its water supply from the mains, delivering a truly powerful pressure similar to a regular system boiler. While both system & regular boilers must have a warm water cylinder to store warm water, combi boilers are able to deliver warm water on demand every single time you turn on your tap. Combi boilers work to combine a water heating machine & a central heating boiler in a single compact machine. Combination boilers are available in all types; gas combi boilers, oil combi boilers, LPG combi boilers, & electric boilers. Natural gas combi boilers are rather common amongst homeowners. If your new home is linked up to a gas network, it is genuinely the best alternative to keep running costs relatively low. For residences that are not hooked up to a gas network, an oil combi boiler is a truly popular choice. These Heating & Air Conditioning machines require a tanker of oil to be placed outside your building which must be topped up by your oil supplier as or when it runs out. Liquefied petroleum gas combines gaseous hydrocarbons manufactured from gas & oil extraction 66% & oil refining 34%. This setup is easily the same as oil boilers. For instance, the boiler needs to be supplied with fuel from a tank & refilled when it is actually running low. Electric combi boilers are entirely different from the rest because these systems do not burn fuel to heat water, rather, they pass the water over an electric part.