Customer service by any means is questionable, no answer to phone calls, email only, than you are given a ticket number they call you at there convenience, purchased 3, first one froze was not told to keep it plugged in during winter months so would not freeze when cabin was unoccupied, second one would not ignite, 3rd one ingnited but water would only stay warm. Would not recommend this company. Go with a propane water tank save the trouble, have hot water consistently without interruptions, And easy to drain when residence is an occupied