| Requirements: |
Applicants must be at least 18 years old and have at least 36 months of practical experience with the tools of the trade in the preceding five years.
Class A licenses must provided liability insurance in the amount of $300,000 and $600,000 for aggregate.
Class B licenses must provided liability insurance in the amount of $100,000 and $200,000 for aggregate.
An air conditioning and refrigeration contractor license must be endorsed with one or both of the following endorsements:
- An environmental air conditioning endorsement; or
- A commercial refrigeration and process cooling or heating endorsement.
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| Services: |
A Class A license entitles the license holder to engage in each type of air conditioning and refrigeration contracting that is endorsed on the license in relation to a system, a product, or equipment of any size or capacity.
A Class B license entitles the license holder to engage in each type of air conditioning and refrigeration contracting that is endorsed on the license in relation to a system, a product, or equipment of not more than:
- 25 tons cooling capacity; or
- 1.5 million British thermal units per hour output heating capacity.
An environmental air conditioning endorsement entitles the license holder to engage in air conditioning and refrigeration contracting for environmental air conditioning within the class of license held.
A commercial refrigeration and process cooling or heating endorsement entitles the license holder to engage in air conditioning and refrigeration contracting for commercial refrigeration and process cooling or heating within the class of license held
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| Exam: |
Pre-approval is required to sit for the examination. After you have been approved to schedule your exam, contact PSI at 1-800-733-9267.
- Class A examinations have 120 question while Class B exams have 100 questions.
- All exams have a time limit of 3 hours.
- A 70% is required to pass.
Topics on the commercial refrigeration exams include absorption systems, basic refrigeration components, boilers, business and law, combustion air, controls, design and responsibility, equipment requirements, heat loads, HVAC systems, piping, pressure relief protection, refrigeration principles, service, testing, ventilation, and venting.
Topics on the environmental air exams include basic refrigeration components, boilers, business and law, combustion air, controls, design and responsibility, equipment requirements, heat loads, HVAC systems, piping, pressure relief protection, refrigeration principles, service, testing, ventilation, venting, air properties, air distribution, and exhaust.
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