The ban on high GWP small multi-head systems follows similar restrictions on small single-head split system, portable and window/wall air conditioners that started on 1 July 2024. These bans mean that new equipment of these types using R-410A (GWP 2,088) or R-134A (GWP 1,430) cannot be imported, except under a licence exemption or in certain limited cases when a licence may be issued. Most equipment in these categories is now using R32 (GWP 675), or for small portable air conditioners, R-290 (propane). The bans support the HFC phase-down by reducing future demand for higher GWP HFCs to service equipment, and remove outdated, climate damaging air conditioning models from the Australian market. The ban starting in July 2025 applies to outdoor units for multi-head split systems, including variable refrigerant flow systems, if the equipment: • is designed to be used to cool or heat, or both, a stationary space primarily for human comfort • has a standard refrigerant charge of 2.6 kg or less (based on the compliance/rating plate) • is designed to operate with an HFC refrigerant with a GWP of more than 750 (whether or not the unit is charged with refrigerant when imported). Technicians working with air conditioning equipment don’t need to do anything differently. Existing installed equipment won’t be affected, and equipment imported or manufactured before 1 July 2025 may be sold and installed after that date.