Comments about Coleman Sportcat Perfecttemp Heater: Coleman Sportcat Perfectemp Catalytic Propane Heater With Instastart Technology:

I used the heater two nights when the temp. was around 39 degrees outside my tent. The heater changed the temp. inside my tent very very little. I'm not real sure what the lowest temp. the heater is effective at, but I can tell you lower then 40 degree it didn't work for me.