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and maintenance of new and existing plumbing systems
2018 - Updated 2020
Approved Production Facilities
and Residential Contractor (GC/BC/RC) Exam with this 100 Question Practice Test for the Walker's
please try out the Gypsum Contractor Online Home Study course
PSI D-1 Limited Warm Air, Air Conditioning & Refrigeration System Contractor HVAC and maintenance of new andPSI D 1 Limited Warm Air, Air Conditioning & Refrigeration System Contractor PSI Connecticut D 1 Limited Warm Air, Air Conditioning & Refrigeration System Contractor license allows individuals to install, repair, replace, maintain, or alter warm air, air conditioning, and refrigeration systems, including necessary piping and pumping equipment, but not oil burners. Approved References International Mechanical Code or International Mechanical Code
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