I'm building a 384 sq foot shop. 2/3rds of the ceiling will be 8 ft with a 5ft loft up above. The shop will be sealed but not insulated. Do you guys think a jotul 602 will be sufficient enough to heat? I live in central Georgia so our winters don't get below 20 degrees on a cold day. Space is limited as I will be working in it. Any suggestions? Thanks!