I've kept the heater rather than the hassle of returning it, because it does work. But as the third oil-filled heater bought over 25 years, this one leaked oil from the start at high temperature settings. At lower temperatures it isn't consistent with heat. Also, something rattles inside near the controls when the unit is touched or moved, I don't know if that's a defect or by design.

Update: I was happy with this heater when it was fall. It was a cool season and I needed it. But now its getting down to 12 degrees at night and even when the heater is on high, it can’t keep up with the cold. I know my house is drafty, but I bought another unit from a different company and that one heats the room x2 better. I’m sorry, but it’s only going to get colder and I needed something that worked better. On the bright side, it might work in a house that isn’t drafty, like if you just wanted to heat a bathroom before showering, cut the chill in a small office space, or if you live in a warmer climate. Not ideal for heating average sized bedrooms in northern climates though.

This heater works on the concept of convection. Rising heat draws in cooler air from the sides. This is a passive radiator. It creates a vertical column of luke warm air. But it fails to 'heat' a room (30-40 degree F outside temperatures). For the amps/watts being consumed, a slow speed circulating fan would likely make this a MUCH better buy. I would not recommend this style heater to anyone. I was very hopeful. :(