Understanding the Intricacies of Air Handler Units in HVAC Systems

The Heart of Your Home’s Comfort

At J. E. Shekell, we’re committed to educating our customers about the various components of their HVAC systems. Today, we’re diving into the technical details of air handler units, a crucial element in many heating and cooling setups.

What is an Air Handler Unit?

An air handler unit (AHU) is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system. It’s typically a large metal box containing a blower, heating or cooling elements, filter racks or chambers, sound attenuators, and dampers.

Key Components of an Air Handler

1. Blower: This fan-like component moves air through the ductwork.
2. Evaporator coil: In cooling mode, it removes heat and humidity from the air.
3. Heating element: Often electric resistance coils or a hot water coil.
4. Filter: Traps dust, pollen, and other particles to improve air quality.
5. Mixing chamber: Combines return air with outdoor air.

Types of Air Handlers

– Terminal Units: Smaller, often used in commercial buildings.
– Packaged Units: Contain all HVAC components in one cabinet.
– Central Station AHUs: Large units serving multiple zones in a building.

Efficiency Considerations

Modern air handlers are designed with energy efficiency in mind. Variable speed blowers can adjust their output based on the home’s needs, reducing energy consumption. Additionally, high-efficiency filters can improve indoor air quality without significantly impacting system performance.

At J. E. Shekell, we’re experts in installing and maintaining these complex systems. Whether you’re in Evansville or the surrounding areas, our team is ready to help you optimize your HVAC system for maximum comfort and efficiency.