This has both a water cylinder and a tank, so you will need to find room to store both like system boilers, hot water can run out so you will need to wait for it to reheat they suit large households because they can send hot water to lots of taps at the same time. What does a landlord gas safety inspection include? A very nice man came, cleared the drains and was gone within minutes of phoning happy drains! very impressed!”. I am truly thankful, that you.