I purchased this heater for my medical practice to provide additional heat for an average sized room. I was excited after reading the advertisement for it. I read the manual and followed every step before operating the unit. I turned it on and waited for it to work. After 30 mins....nothing, After 1 hour.....nothing, After a full work day.....absolutely nothing! All you feel is a small breeze. It struggles to blow out a considerable amount of heat. I asked my patients whether they felt warmer and they asked if the unit was even on. I then plugged in a small Lasko space heater that I borrowed from another room and it out performed the Vornado heater. I was going to return the unit backmbut am too busy running my business to take time out of my day to ship it back. Atleast it's a tax write off.