You could be ice fishing or you might be having a winter bbq and need some supplemental heat.
Perhaps you need some heat to get the old tractor going on a cold day.
The One Stop Gardens 30,000 BTU Tank Top Propane Heater uses radiant heat, making it less susceptible to wind dissipation. The propane heater mounts directly to a standard 20 lb. liquid propane tank and uses a standard POL tank connection. Features include a variable heat control valve so you’ll always have the perfect temperature and a high-efficiency heat reflector so none of the heat is lost. No electricity needed and it has an easy-start feature.
This heater is rated for outdoor use only and should provide around 60 hours of heat from a full 20 lb. tank.