A male heating and cooling techinican performs maintenance on a residential furnace. The furnace is open and exposing its inner wires. The technician holds a calibration device in his hands to check performance levels of the equipment.
A male heating and cooling techinican performs maintenance on a residential furnace. The furnace is open and exposing its inner wires. The technician holds a calibration device in his hands to check performance levels of the equipment.
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