RSES is one of the longest-standing education and certification bodies in the HVACR industry, founded in 1933 when commercial and domestic refrigeration was still in its infancy. The society offers a tiered certification pathway designed specifically for field HVAC technicians: the Certificate Member (CM) credential validates broad technical knowledge in refrigeration and air conditioning theory, and the Certificate Member Specialist (CMS) credential recognizes mastery of a specialty discipline such as commercial refrigeration, heat pumps, controls, or dynamic compression. RSES also administers EPA Section 608 certification, R-410A safety testing, and the Low GWP/A2L refrigerant credential covering next-generation refrigerant handling.
Beyond certification, RSES operates a network of local chapters that meet regularly for hands-on training nights, guest-speaker sessions, and continuing education units (CEUs). Members gain access to the monthly Service Application Manual technical library, the RSES Journal, eLearning courses, live webinars, and the annual Technical Institute that preps technicians for the CM exam. The combination of peer-to-peer chapter learning and structured curriculum makes RSES a go-to resource for HVAC shops that want to build a credentialed, continuously educated technician bench without sending crews off-site for extended periods.
For HVAC contractors, RSES offers a low-cost way to formalize technician training, satisfy state and utility CEU requirements, and give techs a clear progression from apprentice to specialist. Membership dues are modest compared to coaching-heavy alternatives, and the study materials, practice exams, and chapter mentorship help techs pass EPA 608, NATE, and manufacturer-specific exams. Shops use RSES credentials as a hiring signal and as a component of internal career ladders for service technicians.