Rafal Kaczynski
Hi Rory Combi boilers are for heating domestic water to your taps and for central heating and they are very efficient as a heating elements in propertys. Combi boilers installed after 2005 are condensing boilers what means they are using 30% less gas than old boilers . Electric shower is a water heater just for a shower and works by cold water mains pressure heating water by electricity( inside is a small heating tank with immersion heater which heat water during operation) tumble druers are for drying cloths only not for anythink else
