my water heater is crapping out on me. I am looking into getting a tankless heater because I have a huge whirlpool tub and the tank I have runs out when it gets a little over half full. can some of our whackbag plumber type friends give me an idea about what to expect for installation prices? I am pretty sure it won't be able to go where the current tank is because it is not on an outside wall. it will probably have to move about 20 feet or so to get to the outside wall, wich would be in the crawl space side of the house. the crawl space is about 4 feet tall so I am guessing it would be ok there. the crawl space is insulated on the foundation walls. not sure what other info would be needed. thanks for any help or insight.