Mr. Heater 30,000 BTU Propane Blue Flame Vent Free Heater MHVFB30TBLP
Product Review (submitted on October 1, 2013):
Bought it to replace a 30k btu radiant heater that worked well. This one seems to be better. It has not been cold yet, with outside temps in the mid50s to low 60s, but at position 2 it adds 4 to 5 degrees inside a 2500 sqft house in a couple of hours. The fan is a bit noisy so I leave it off and use a ceiling fan in reverse.