I have a hose to connect each heater to a 20 lb bottle. Works great for heating my hunting camper overnight or longer when needed. For sits at the ball field or shooting house I prefer the 1 lb bottles. They last around 4 hours and are much lighter, and easier to carry already attached to the heater than lugging around a bottle that's the size of a 5 gallon bucket and weighs 30 lbs or maybe more in addition to the heater and all of my other gear.
