Video: Introduction to AHU and RTU in HVAC Systems

Air Handling Units (AHUs) and Rooftop Units (RTUs) are both essential components of HVAC (Heating, Ventilation, and Air Conditioning) systems. However, they differ in terms of their location, design, and functionality.

AHUs are typically installed indoors and are responsible for conditioning and distributing air throughout a building. They consist of a housing unit containing a blower, heating and cooling coils, filters, and other components necessary for air treatment. AHUs are designed to operate in a controlled environment, where they can maintain temperature, humidity, and air quality parameters.

On the other hand, RTUs are self-contained units that are installed on the rooftop of a building. They are designed to condition and distribute air to a single zone or multiple zones within a building. RTUs typically contain a compressor, condenser, evaporator, and air-handling components, and can be configured for cooling, heating, or both. They are suitable for buildings with limited indoor space or where indoor air quality is less critical.

In an HVAC system, AHUs and RTUs work together to maintain a comfortable and healthy indoor environment. AHUs are responsible for treating and conditioning air before it is distributed to different zones through a network of ducts. RTUs, on the other hand, are used to condition air for specific zones or areas within a building. They are often used in conjunction with a building automation system, which can control the operation of both AHUs and RTUs to ensure optimal energy efficiency and occupant comfort.

In summary, AHUs and RTUs are both critical components of HVAC systems. AHUs are typically installed indoors and are responsible for conditioning and distributing air throughout a building, while RTUs are installed on rooftops and are used to condition air for specific zones or areas within a building. Together, they work to maintain optimal indoor air quality and occupant comfort.