Propane services across the United States can be found on Propane.com under Find a Propane Retailer. The tool allows a user to enter a ZIP code and select the types of services that are needed.
Propane tanks used in portable space heaters for the home typically utilize a 20-pound gas cylinder that can be purchased at hardware stores such as The Home Depot or Lowe's. Once purchased, the owner can refill the tank for a fee by trading in an empty cylinder for a full one.
Home furnaces that contain a propane tank must use a special service to refill the propane when it has been depleted. The tool at Propane.com can help identify what services are needed and what company in the area provides them.