What is the maximum refrigerant charge for small systems typically recognized?

In the context of small refrigeration systems, the maximum refrigerant charge is typically recognized as 3 kg. This standard is important for several reasons, primarily focusing on safety and regulatory compliance.

For systems that contain refrigerants, exceeding a charge of 3 kg requires adherence to more stringent regulations regarding installation, servicing, leak detection, and maintenance. A limit of 3 kg makes it easier to manage these requirements for smaller systems commonly found in domestic and light commercial applications. It simplifies the operation and minimization of environmental impacts associated with refrigerant leakage.

This threshold also reflects common industry practices and is consistent with guidelines set forth in various safety and environmental regulations, which aim to protect both human health and the environment by controlling the use of refrigerants.