Day 7: Inspiration Point, Bryce Canyon National Park. Paula is holding our little Coleman SportCat catalytic heater, which was a very welcome and well-used item that I bought before we left. We left it on all day in the car, so we never had to fight off the chill before the car heater warmed up. It runs for over 17 hours on one little bottle of propane, and puts out a good amount of heat without an open flame.