The footprint alone would be a non-starter for me. The cost would be pretty high for the unit.
I think electric heat with a fan is the best way to go.
Rowdy sure likes our built in one, it throws out heat 3 feet or so. Animals will find the safe spot to lay in front of it, The heater won't tip over and has a built in safety high limit switch. (Graniger's)
http://i112.photobucket.com/albums/n...1/100_0740.jpg