hi kev, u will not get anywere near enough heat of a mytee heater running from cold water it be luke warm at best , u got to fill up water tanks with hot water,dont buy the water tanks from scorpion place they are so over priced and only hold about 125ltr ,buy a 400ltr tank from cleantech for about 120 pounds ,
although the mytee is a good machine and good price its not as good as the ninja , i know this as i hav two mytees and ninjas,and the mytee has two switches for the heater but it is really only one heater it has two switches because of the way it is wired