A gas hot water system burns natural gas in a storage tank or uses a continuous-flow burner that heats water as it passes through. A heat pump uses a refrigeration cycle to transfer heat from the air into a tank; experts say many models use about 30% of the energy of a conventional electric storage unit. Not all units are designed for very cold sites, and compressors create some sound, so climate suitability and siting matter. Visit : https://energypeople.com.au/the-great-debate-gas-vs-heat-pump-hot-water-in-2025/