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I am looking at creating more space in our bathroom so the space taken up by an airing cupboard has come under scrutiny. Currently, all of our household hotwater comes from an indiect vented "Economy 7 " cylinder with two immersion heaters. Therre is no gas in the village. A small additional boost is given from an internal copper coil fed by a copper "boiler" in our multifuel stove. The dimensions of the boiler are approximately 300mm x 150mm x 25mm. It has its own FE supply. The world has moved on since I installed all of this 35 years ago! Poking around on the internet, I have come accross tankless/instant water heaters and thought that they would be worth having a look at. The airing cupboard and cylinder would go and be replaced by some more modern water heating system. The things that I am looking at are as follows. Are the instant water heaters more efficient than the system that I have at present? Do I supply an instant system from my loft FE supply, currently conected to my immersion cylinder or is it a rising main that would do this job? Would all of the instant hot water come from one heatingappliance or would I be better of finding the approriate instant heaters for each outlet such as a bath, shower, hand basin, kitchen sink etc? I have seen some very neat appliances that fit under a bathroom hand basin. The house has three bedrooms, one bathroom and currently three occupants. Any reccomendations, experience or advice would be welcome.