Heating, cooling & air distribution — the equipment and control logic behind HVAC systems.
Compare two fin-and-tube coils, adjust airflow/fouling/frost and read the condenser's heat-balance deficit.
Watch a reciprocating compressor's piston/reed valves and read the ideal P–V indicator cycle.
Balance a variable-speed fan curve against a filter and three damped duct branches.
Compare dry-bulb vs. enthalpy economizer control while mixing outdoor and return air.
Inspect a counterflow induced-draft cooling tower — spray distribution, fill, fan, drift eliminators, basin, makeup and blowdown — and see how fan speed, fouling and wet bulb shift range, approach and water balance.
Trace airflow pickup, damper, actuator, reheat coil and thermostat in a pressure-independent VAV terminal, with automatic PI control, manual override and a stuck-actuator fault.
Operate a chiller, centrifugal pump, throttling valve and building coil in a closed chilled-water loop, and test what happens when the pump or chiller fails.