R-4 Boilers, Including Solar (Residential)

R-39/C-79 (CR-79) Air Conditioning and Refrigeration, Including Solar (Residential/Commercial)

C-77 (CR-77) Plumbing, Including Solar (Commercial)

C-74 (CR-74) Boilers, Steamfitting and Process Piping, Including Solar (Commercial)

C-4 (CR-4) Boilers, Steamfitting and Process Piping (Commercial)

C-58 (CR-58) Warm Air Heating, Evaporative Cooling and Ventilating (Residential/Commercial)

C-49 Industrial Refrigeration (Commercial)

R-37R Plumbing (Residential)

R-37 Plumbing, Including Solar (Residential)

C-37 (CR-37) Plumbing (Commercial)

R39R/C39 (CR-39) Air Conditioning and Refrigeration (Residential/Commercial)

R-4R Boilers (Residential)

National Standard Journeyman Mechanical 671

National Standard Master Plumber with Gas 674

C-77S Solar

R39/C79S Solar