I've been doing some research and think I'll be going with this heater for the 28x28 attached. Anyone have any first-hand experience with this model or feedback on whether this would be a good option?
Ceiling-Mount Industrial Electric Heater - 7500 Watt, 31.3 Amp, 25,600 BTU
http://ecx.images-amazon.com/images/I/316fI%2Bd02nL.jpg
http://www.amazon.com/dp/B000A6H1IS/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=3KT9SPPICUV9K&coliid=I2LBRF2G3H1KL4