When setting up your patio heater, it should be placed on a flat, solid surface to minimize the risk of tipping. You’ll also want to keep it at least three feet away from combustible items like plants, fabrics, and even propane tanks. In general, arrange the heater fairly close to your outdoor seating or dining area—this will allow you to get the most heat from it, and if it’s too warm, you can simply turn it down, which will also help you save fuel.