HVAC System Diagram: How Air Handling Units Work #3458852 (License: Personal Use)

This technical illustration reveals the internal layout of a large-scale air handling unit (AHU), including steam humidification, UV-C germicidal lamps, multi-stage filtration, cooling and after-cooling coils, heat recovery wheels, and exhaust pathways. Arrows indicate the flow of supply air, return/relief air, outside air, and exhaust air, demonstrating integrated energy recovery and air purification strategies. The design supports high-efficiency climate control in commercial or institutional buildings.

Used on HVAC educational pages, engineering guides, or product documentation to help technicians, architects, and facility managers understand system architecture and component interplay; matches user intent for learning or troubleshooting air handling systems.