Preventive maintenance of MEP Equipment

How AHU Works and Its Types

Introduction

Air Handling Units (AHUs) are vital components in HVAC systems, responsible for conditioning and circulating air within a building. Understanding how AHUs work and the different types available is crucial for optimizing their performance in various applications.

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How AHU Works

AHUs work by drawing in air from outside or from within the building, filtering it, cooling or heating it, and then distributing the conditioned air throughout the building via ducts. The components of an AHU include fans, filters, heating/cooling coils, dampers, and sometimes humidifiers or dehumidifiers.

Types of AHU

Draw-Through AHU: Air is drawn through the filter, coil, and fan before being discharged.
Blow-Through AHU: Air is blown through the filter and coil after passing through the fan.
Single Zone AHU: Serves a single area or zone, with no zoning capability.
Multi-Zone AHU: Can serve multiple areas or zones, with individual controls for each zone.
Rooftop AHU: Installed on the roof, often used for large commercial buildings.
Modular AHU: Consists of modular components that can be assembled to meet specific requirements.
Custom AHU: Designed and built to meet unique specifications and requirements.

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