I personally would avoid the fan ones. I use radiating oil filled radiator types and they work good. I use http://www.homedepot.com/p/1-500-Wat...218H/202295910 and it heats my whole basement where I keep my snakes. I keep it under half setting as anything above that and it gets too hot for comfort. And it's a full size basement like 20'x20'. I also keep my house set to 77F though but it works nicely.