Russell Hobbs RHGH02 Gas HeaterRussell Hobbs Gas Heater The three ceramic plates rapidly increases the temperature in a standard sized room. Select from 1, 2 or all 3 ceramic plates to effectively warm up your space and make the most of your 9kg cylinder by only letting a small amount of gas through rather than opening up your hose gauge entirely. The built in automatic oxygen depletion sensor is a safety device that immediately shuts off the gas flow should the oxygen in the air