We have a Kitchen Queen 480 that cooks our food in an oven and stove top. This spring, we will be plumbing it so that it will also heat our water for the house. The Kitchen Queen 480 has a stainless steel heat exchange inside the firebox. The heat exchange uses thermal syphoning (No Motors) to our glass lined hot water tank which then will feed into our electric water tank. We're pretty excited about this setup due to it’s dual purpose cooking and water heating for an off grid homestead.