Type 2 certification primarily relates to which type of units?

Type 2 certification under the EPA 608 guidelines specifically pertains to the servicing and repair of high-pressure systems, including residential and light commercial air conditioning and heat pump units. This certification is essential for technicians who work with appliances that use refrigerants classified as high-pressure, ensuring they understand the safe handling and proper management of these systems.

Technicians with Type 2 certification are equipped with knowledge about the unique considerations involved in managing refrigerants in these types of systems, including recovery and recycling practices that meet EPA regulations. This is crucial, as the improper handling of refrigerants can lead to environmental damage and health risks.

While the other options refer to various types of equipment and appliances, they either fall under different certification types or are not specifically categorized as high-pressure systems. This makes Type 2 certification uniquely focused on residential and light commercial units.