With a larger tank, the propane delivery company may be willing to sign a contract with you to sell you fuel at one price for the whole year. Then when a truck is in your neighborhood, they can top off your tank. This prevents drivers from having to haul half a tank of propane to their shop because your neighbor with the small tank ran out of propane overnight. This brings us to another advantage of a large propane tank. You never have to worry about running out of propane. If snow and ice make it impossible for the propane truck to get to your house, you are good for another two months. This is one aspect of life with gas heaters that many people don’t miss if they ever make the switch to electric heating.