This portable propane heaters stand at about 8′ High and radiate a 9′ diameter heat. This AEI Patio Heaters are the most reliable units in the market and the first choice of event professionals. Patio heaters are recommended for outdoor events. The heater will last between 5-8 hours on a single full propane thank. Heaters may also be covered with a flame retardant vinyl if a different color is required-additional charges will apply.