What Is The Difference between Coil And Air Handler?

What is the difference between coil and air handler?

Coil

Function: Coils are heat exchangers that either absorb or release heat to condition the air.

Types:

Cooling Coils: Typically filled with refrigerant; they absorb heat from the indoor air, cooling it.

Heating Coils: Can use hot water, steam, or electric resistance to heat the air.

Location: Coils can be found within air handlers, chillers, or other HVAC systems.

Role: Directly involved in the heating or cooling process of the air.

Air Handler (AHU)

Function: An air handling unit circulates and conditions air throughout a building.

Components: Includes blowers, coils (both heating and cooling), filters, and dampers.

Location: Typically located indoors.

Role: Manages air circulation, filtration, and temperature control, providing overall climate comfort.

Key Differences

Purpose: Coils specifically handle heat exchange, while air handlers encompass a broader range of functions related to air movement and conditioning.

Components: Coils are individual components, whereas air handlers are complete units that include coils as part of their system.