120 gallons
These tanks are for homes that use propane for two or more propane appliances, such as ranges or cooktops, clothes dryers, water heaters, space heaters or fireplaces. You’ll need something larger for whole-house heating.
330 gallons and 500 gallons
If you’re using propane for whole-house heating, one of these is the size you’ll need.
1,000 gallons
These are often used in commercial or industrial settings. But if you have a very large home and use high-Btu propane appliances, such as pool heaters, you may need this size.