Certifications for Heating, Air Conditioning, and Refrigeration Mechanics and Installers
121 certifications are listed for Heating, Air Conditioning, and Refrigeration Mechanics and Installers (O*NET 49-9021.00) in the U.S. Department of Labor's CareerOneStop Certification Finder. 112 are tied directly to this occupation; the other 9 are related.
The order is CareerOneStop's, not ours: in demand first, then NCCA- and ANAB-accredited, then the rest. Downloaded July 2026. Records marked confidential or withdrawn at source are not published here. Listing is not endorsement, and this page is not advice about which credential to pursue.
- Certified Chimney Journeyman(CCJ)ANAB (ANSI) accredited
- Certified Chimney Professional(CCP)ANAB (ANSI) accredited
- Certified Chimney Reliner(CCR)ANAB (ANSI) accredited
- Certified Industrial Refrigeration Operator(CIRO)ANAB (ANSI) accreditedMilitary occupational specialty
- NITC Journey Level HVACANAB (ANSI) accredited
- STAR HVACR MasteryANAB (ANSI) accreditedMilitary occupational specialty
- Title 24 Mechanical Acceptance Test TechnicianANAB (ANSI) accredited
- UA Energy AuditorANAB (ANSI) accredited
- Certified Assistant Refrigeration Operator(CARO)ANAB (ANSI) accreditedMilitary occupational specialty
- Certified Refrigeration Service Technician(CRST)ANAB (ANSI) accredited
- Air Conditioning Service CertificationMilitary occupational specialty
- Air Distribution Installation CertificationMilitary occupational specialty
- Air Distribution Service TechnicianMilitary occupational specialty
- Air to Air Heat Pump InstallationMilitary occupational specialty
- Air to Air Heat Pump Installation Specialty CertificationMilitary occupational specialty
- Gas Heating (Air) InstallationMilitary occupational specialty
- Gas Heating (Air) ServiceMilitary occupational specialty
- Hydronics Gas ServiceMilitary occupational specialty
- Hydronics Oil ServiceMilitary occupational specialty
- Light Commercial Refrigeration ServiceMilitary occupational specialty
- Oil Heating (Air) ServiceMilitary occupational specialty
- Principles and Practice of Engineering - Mechanical: HVAC and Refrigeration(PE-M:H&R)Military occupational specialty
- Section 608 Technician Certification (Type I)Military occupational specialty
- Section 608 Technician Certification (Universal)Military occupational specialty
- STAR Residential-Light Commercial HVACR MasteryMilitary occupational specialty
- Solar Heating Installer(SHI)Military occupational specialty
- HVAC TechnicianIndustry-endorsed
- Air Conditioning and Heat Pump Professional
- Air Leakage Control Installer
- Air Systems Cleaning Specialist(ASCS)
- Basic Refrigeration and Charging Procedures Certification
- Carbon Monoxide & Combustion Analysis Certification
- Carbon Monoxide Safety Certification
- Certified Duct and Envelope Testing
- Certified Electrical Safety Technician(CEST)
- Certified Master Specialist Hands-On - Residential Gas Furnace(CMS)
- Certified Master Technician
- Certified National Appliance Service Technician - Refrigeration and Air Conditioning
- Certified Refrigeration Compliance Manager(CRCM)
- Certified Refrigeration Energy Specialist(CRES)
- Certified Residential Heat Load Analyst
- Certified Subject Matter Educator - Gas Heat(CSME)
- Certified Technician
- Certified Ventilation Inspector(CVI)
- Cleanroom Testing Engineer
- Combustion Appliance Zone Certification
- Crew Leader
- Electrical Certification
- Energy Storage Installation Professional(ESIP)
- EPA Section 608 Certification(EPA608)
- EPA Section 608 Certification - Refrigerant Handling
- Fuel Oil Combustion Certification
- Gas Heat Certification
- Geothermal Heat Pump Certification
- Green Awareness Certification
- Ground Source Heat Pump Loop
- Heat Pump Certification
- Heat Pump Installer Certification
- Heat Pump Service Certification
- Heating Professional
- HVAC Efficiency Analyst - Senior
- Infiltration and Duct Leakage
- Instructor Certification(EPIC)
- Light Commercial Air Conditioning Certification
- Light Commercial HVAC Design
- Light Commercial Refrigeration Certification
- Master Oil Heat Specialist Certification(6149)
- Master Specialist Hands On Air Economizer Controls
- Master Specialist Hands On Building Automation Systems Set-up and Commissioning
- Master Specialist Hands On Calculating Indoor Air CFM
- Master Specialist Hands On Combustion Analysis Certification
- Master Specialist Hands On Commercial TEV Metering Device Troubleshooting
- Master Specialist Hands On Constant Air Volume, A/C and Heat Pump Systems Set-up and Commissioning
- Master Specialist Hands On Demand-Controlled Ventilation Set-up and Commissioning
- Master Specialist Hands On Duct Leak Testing
- Master Specialist Hands On Economizer Set-up and Commissioning
- Master Specialist Hands On Envelope Leak Testing
- Master Specialist Hands On Fault Detection & Diagnostics for Packaged DX Units Set-up and Commissioning
- Master Specialist Hands On Hydronic System Variable Flow Control Set-up and Commissioning
- Master Specialist Hands On Light Commercial Air Conditioning Certification
- Master Specialist Hands On Light Commercial Refrigeration Certification
- Master Specialist Hands On Outdoor Air Set-up and Commissioning
- Master Specialist Hands On Residential Air Conditioning
- Master Specialist Hands On Residential Energy Auditing Certification
- Master Specialist Hands On Residential Heat Gain and Heat Loss Calculation
- Master Specialist Hands On Residential Heat Pump
- Master Specialist Hands On Supply Water Temperature Reset Controls Set-up and Testing
- Master Specialist Hands On System Charging and Start-up
- Master Specialist Hands On Variable Air Volume Set-up and Commissioning
- Master Specialist Hands On Water Valve Leakage Testing
- Master Specialist Residential Electric Heat
- NAFA Certified Air Filter Specialist(NAFA-AFS)
- NAFA Certified Technician(NCT)
- NC3 Trane BAS - 1: Intro to HVAC Systems, Building Control
- NC3 Trane BAS - 3: Set Points, Scheduling, Area & VAS, Points
- NC3 Trane BAS - 4: Chiller Plant Control, Alarms, Events
- Oil Heat Certification
- Principles of Electrical and Refrigeration Theory
- Residential & Light Commercial Hydronic Heat Certification
- Residential Air Conditioning Certification
- Residential and Light Commercial Low Pressure Hydronic Heat Certification
- Residential Heat Load Analyst
- Residential HVAC NC3 Certifications - Air-to-Air Heat Pump
- Residential HVAC NC3 Certifications - Airflow
- Residential HVAC NC3 Certifications - Refrigeration Diagnostics
- Residential HVAC NC3 Certifications - Variable Speed Motors
- Residential HVAC Design for Quality Installation
- Retrofit Installer Technician
- Section 608 Technician Certification (Type III)
- Section 609 EPA Certification(EPA609)
- STAR Commercial Refrigeration Mastery
- System Diagnostics & Troubleshooting Certification
- System Diagnostics and Troubleshooting
- Test and Balance Technician
- Universal R-410A Certification
- Certified Indoor Air Quality Manager(CIAQM)
- Certified National Appliance Service Technician - Universal Technician
- Certified Service Manager
- Combustion Analysis Certification
- Electrical System Installation 1(C-206)
- Test and Balance Engineer(TBE)
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Certification data from CareerOneStop, sponsored by the U.S. Department of Labor, Employment and Training Administration (DOLETA) and the Minnesota Department of Employment & Economic Development (DEED).
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