Pishta, I'm going to respectfully disagree. I've had my CO detector go off when running some of my Mopars in the garage, even with the doors open, but I've never had the detector go off when running my kerosene forced air heater, even with the doors closed.
I've found that in only about 5 minutes my kerosene forced air heater will warm the air up so it is comfortable to work on my cars, but if you really want to warm up all that 5/8" gypsum drywall on the walls and ceiling and the concrete floor, so the room will stay warm for awhile after you turn the heater off, you've got to leave it on for about 3 hours. That's about $7.50 or so in of kerosene.
