Should I Insulate My Water Heater? 3 Ways to Improve Water Heater Efficiency Very few homeowners would guess that their biggest energy expense is water heating. But once you think about it, it’s not all that surprising to find that heating water for showers (those long, hot showers you love), and washing dishes, doing laundry, […] The post Should I Insulate My Water Heater? appeared first on Admiral Propane.