Make becoming a journeyperson the next step in your Refrigeration and Air Conditioning career. Applicants to the Refrigeration and Air Conditioning Systems Mechanic Algonquin College Certificate program must: be currently employed in the trade. be formally registered as apprentices with the Ministry of Training, Colleges and Universities (MTCU). have a valid Offer of Classroom Training from the Ministry of Training, Colleges and Universities that includes your Ministry Client ID and approved Class Number. Eligibility is determined by the Ministry of Training, Colleges and Universities. The Refrigeration and Air Conditioning Systems Mechanic trade is a compulsory trade in Ontario and requires Certification. To practice outside of Ontario, a Red Seal Endorsement is required.