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Install expansion and control valves, using acetylene torches and wrenches.
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Install dehumidifiers or related equipment for spaces that require cool, dry air to operate efficiently, such as computer rooms.
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Repair or replace defective equipment, components, or wiring.
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Install, connect, or adjust thermostats, humidistats, or timers.
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Cut or drill holes in floors, walls, or roof to install equipment, using power saws or drills.
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Comply with all applicable standards, policies, or procedures, such as safety procedures or the maintenance of a clean work area.
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Repair or service heating, ventilating, and air conditioning (HVAC) systems to improve efficiency, such as by changing filters, cleaning ducts, and refilling non-toxic refrigerants.
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Braze or solder parts to repair defective joints and leaks.
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Inspect and test systems to verify system compliance with plans and specifications or to detect and locate malfunctions.
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Estimate, order, pick up, deliver, and install materials and supplies needed to maintain equipment in good working condition.
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Supervise and instruct assistants.
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Schedule work with customers and initiate work orders, house requisitions, and orders from stock.
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Test pipes, lines, components, and connections for leaks.
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Lay out reference points for installation of structural and functional components, using measuring instruments.
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Keep records of repairs and replacements made and causes of malfunctions.
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Connect heating or air conditioning equipment to fuel, water, or refrigerant source to form complete circuit.
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Discuss heating or cooling system malfunctions with users to isolate problems or to verify that repairs corrected malfunctions.
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Adjust system controls to settings recommended by manufacturer to balance system.
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Perform mechanical overhauls and refrigerant reclaiming.
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Measure, cut, thread, or bend pipe or tubing, using pipe fitter's tools.
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Study blueprints, design specifications, or manufacturers' recommendations to ascertain the configuration of heating or cooling equipment components and to ensure the proper installation of components.
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Recommend, develop, or perform preventive or general maintenance procedures, such as cleaning, power-washing, or vacuuming equipment, oiling parts, or changing filters.
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Install or repair self-contained ground source heat pumps or hybrid ground or air source heat pumps to minimize carbon-based energy consumption and reduce carbon emissions.
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Install or repair air purification systems, such as specialized filters or ultraviolet (UV) light purification systems.
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Lift and align components into position, using hoist or block and tackle.
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Test electrical circuits or components for continuity, using electrical test equipment.
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Lay out and connect electrical wiring between controls and equipment, according to wiring diagrams, using electrician's hand tools.
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Mount compressor, condenser, and other components in specified locations on frames, using hand tools and acetylene welding equipment.
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Install auxiliary components to heating or cooling equipment, such as expansion or discharge valves, air ducts, pipes, blowers, dampers, flues, or stokers.
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Record and report time, materials, faults, deficiencies, or other unusual occurrences on work orders.