Top best answers to the question «How long does 9kg gas last in a heater»
A 9kg gas bottle (patio gas) will last about 15 hours, when cooking with a small 2 burner compact BBQ used on high. It will last even longer on lower settings or if only one burner is turned on. Patio gas (4.5 kg) will last 6 hours with a 35 MJ patio gas heater.
According to Bruce Wilson of Midgas, a 9kg canister of gas lasts around 30 hours. So to run a gas heater at full power for 3 hours a day for 30 days could cost nearly R735.