I'm running a Modine Hot Dawg in my shop and it works very well. Love it. Very consistent and very quiet. Thermostat is always on 50 throughout the winter, and I bump it up in the evenings and weekends when I'm spending time in there. My shop is 32x44 with 12' cielings. I have a 100 gallon propane tank feeding it, and I go through 200-300 gallons a year depending on the severity of the winter.