I bought 1 for bedroom and 1 for living room to supplement household heat for extra cold night. (Not many because I live in de.) 1 was purchased last Feb. Used part of feb and stored in original box. When we pulled it out this year it keeps clicking back off before it heats. The other purchased a week earlier and used about the same amount stays turned on but never heats! Expensive heater for under a month of use! Only gave 1 star because I had to post a review! Didn't want to give any stars!