Heaters do not last forever. Some older heaters cannot be repaired for safety reasons and sometimes spare parts are not available. If your heater is very old (around 15 to 20 years), it may be worthwhile having a chat with your service agent, to get their recommendation. Replacing an older heater will give you access to the latest technology, which is also more energy efficient (up to 7 star equivalent1 energy efficiency rating), saving you significant money on the running costs. ¹ Star rating equivalent. Based on Australian Gas Association’s results calculated in accordance with the testing methodology in AS/NZS5263.1.6:2020.