I have a small ranch home in NE PA. I had my elect hot water heater in a bedroom closet. I have an unheated crawl space in which all the plumbing runs through. Every pipe is insulated and some have pipe warmers. No pipes have frozen before. I wanted more room in my closet so i had the tank moved to the crawl space. I have a vapor barrier and dehumidifier down there so moisture is not a problem. All new pipes to the hot water heater have been insulated. Do i need to insulate the hot water heater itself? Should i get a hot water heater jacket? Should i add a heater to the crawl space itself? This is a weekend home so we previously shut the cold water (well pump) and hot water heater off when we weren't there during the winter and drained the pipes. I realize this left water in the hot water heater, but the heat was on 45 in the house so there were no issues. Now, with the hot water heater in the crawl space, am I able to still turn it off when i am not there? Or should i leave it on? If i have to leave it on, can I still turn the cold water off and drain the pipes? Please help.