R290 Charge Limit – Progress & Next Steps

Amidst increasing regulatory pressures at the state and federal levels, a growing number of US food retailers are looking to natural refrigerants – including carbon dioxide, ammonia, and propane – as future-proof options. Propane solutions offer opportunities for new and existing stores, but innovation has been limited due to the current allowable charge size of 150g per circuit in self-contained cases. Much of the industry is anxiously awaiting the approval of higher charge sizes for propane through codes and standards due to potential energy, capacity, and cost benefits.