I have a 20 year old hot water heater 40 gallon gas .that has a insulating wrap on it in a basement room that is about 10x10 unheated but has a hot water heater boiler (I guess) in it that is my main house heater and keeps this one room at a temperature about 40 or 50 degrees with the water piping extending under the main house that is just dirt and is unheated. Not technical language here for I do not know much in the way of this type of language or equipment. Can I get some suggestions on buying a new hot water heater that would be a more modern one that would supply the plumbing in my house (sinks and toilets)? Thanks... clancey.