Was in Cary and Garner (Hwy 70) Lowes on Friday. They are clearancing seasonal heating devices - half off. I have one of the infa-red plaque heaters in my shop and love it. They have both 18,000 BTU and 30,000 heaters. I have the 30K in my shop. Both have a thermostat built in. Smaller unit says heats up to 600 square feet, and larger one does 1000 square feet. Original price on smaller was $198, and larger was $267. These heaters come in either natural gas, or propane. Cary store has more natural gas ones, while Garner store has more propane units. We also have one of the 30K units in our addition for emergency heat. A twenty pound bottle of propane last me about three weeks in the shop. With natural, you would have to run a gas line. This may be better done by a plumber. With the propane, you could use a flex line and regulator, along with a propane tank. Regulator and flex line can be bought at Agri-Supply. But Lowes may be cheaper due to seasonal merchandise clearance.