http://www.firepitsoutdoors.com/Deluxe-Patio-Heaters Our outside patio heater is designed with a convenient wheel assembly for your convenience and mobility even with the propane tank installed. Deluxe patio heaters use a standard twenty pound propane tank that is hidden neatly in the base. With all of the quality and conveniences these deluxe patio heaters have to offer we are sure you will be happy with this outside patio heater for many years.