What is the difference between a combi boiler and a multipoint heater?

Instantanoous multipoint water heaters : These provide hot water to multiple taps or appliances at the same time. when the hot tap is turned on, a powerful gas burner in the heater ignites. The incoming cold water is heated as it flows through a large heat exchanger located above the gas burner. The heat ecchanger heats up a large volume of water very rapidly. They do not supply hot water to a cental heating system. Combination boiler : These provide hot water to the central heating system and instantanious hot water to the tap. when the hot water tap is turned on all the heat is diverted to the heat exchanger to give a rapid responce. hope this is of some use. austin mod 6