Look for the money-saving stars on gas heating systems
Electrical goods are not the only appliances with energy-rating stars. Gas heating systems such as ducted heating and gas space heaters have them too (they’re also on gas water heaters).
Gas labels give you a 
star rating for energy efficiency – they also give you the annual energy consumption of the product with a MJ (megajoules) per year figure.
Look out for gas heating appliances that have a maximum number of energy-rating stars and the lowest MJ figure.
Each extra star on a gas heater will save you around 10% on running costs. If your business is investing in a gas space heater or a ducted gas heating system, make sure that it has a minimum 4-star rating.[1] Super-efficient systems are now available that have a 6-star rating.[2]
If you are buying a ducted gas heating system, you can maximise the cost efficiency of the system by insulating the ducts.
Further advice on gas heating
You can also download a gas heater advice leaflet from Sustainability Victoria here: EnergyCut.info/heating-flyer
Each extra star on a gas heater will save you around 10% on running costs.[3] Look out for gas heating appliances that have a maximum number of energy-rating stars and the lowest MJ figure.