Kind of funny....started reading this post yesterday about Catalytic heaters. Went to a big community garage sale at the campground we are staying at and got a nearly new 9,000 btu DynaGlo for 40 bucks. On the box it noted that you can use indoors or outdoors, but that you should have adequate ventilation. Will be nice on cooler evenings outside or to help warm up our living area on cool mornings.............Les
