Was very skeptical at first, but these are not ordinary heaters. And despite what others say 1500watt heaters are NOT all the same. This uses the 1500 watts to power 5 Infrared quartz lamps. They produce short wave Infrared and then when hitting the copper chambers are converted to long wave which produce a lot more heat. It's the same difference between AM (short wave) and FM (long wave). Amazing technology and I ran it over night for only 7 cents to keep my store heated to 65 degrees in the winter in Minnesota. This is something you may hear pros and cons about. You cann't please everyone I suppose. This is something you HAVE to try for yourself. I looked at the three companies making them and Edenpure and Cozy are made of plastic and partical board with plastic on top with an almost non exsistant warranty on the Whole unit. Sunheat is made really well and they cover everything for 3 years! Needless to say I went with Sunheat. Good luck in saving money on heat, it's going to be a long winter.