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Education: Secondary (high) school graduation certificate. Tasks: Install ventilation, air handling and air conditioning systems. Measure and lay out reference points for installation. Read blueprints or other instructions to determine work requirements. Troubleshoot heating systems. Troubleshoot ventilation, air handling, refrigeration and air conditioning systems. Assemble and install refrigeration or air conditioning components. Perform maintenance such as, recharging system with refrigerant, checking and testing regulators or calibrating system. Experience: 1 year to less than 2 years.