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A worker is fixing the ventilation ducts in an attic filled with insulation material. The setting is a residential home during the cold winter months.
Air purification fan ventilation system
Aerial view of multiple cooling units situated on a rooftop. The system features a series of large HVAC units and extensive piping.
air conditioning compressor outdoor unit cleaning service with water spray
Front view of air conditioning wall mounted ventilation system, installed on narrow ceiling above the entrance door in the white hotel room background. Hotel room air ventilation grill on the wall.

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