Two commonly confused components in heating, ventilation, and air conditioning (HVAC) systems are air conditioners and air handlers. While both are essential in regulating indoor temperatures, they serve different purposes.
In this guide, we will break down the air handler vs air conditioner differences, how they function, and how they work together in an HVAC system.
What Is an Air Conditioner?
An air conditioner (AC unit) is a cooling system that removes heat from indoor air and releases it outside. It is primarily responsible for maintaining comfortable indoor temperatures by extracting warmth and humidity from the air. The main components of an air conditioner include:
- Compressor: Pressurizes the refrigerant to facilitate heat exchange.
- Condenser Coil: Releases absorbed heat outdoors.
- Evaporator Coil: Absorbs heat from indoor air.
- Refrigerant: A substance that carries heat between the indoor and outdoor units.
- Blower Fan: Moves cooled air through the ductwork.
How an Air Conditioner Works
- Heat Absorption: The evaporator coil inside the indoor unit absorbs heat from the air.
- Heat Transfer: The refrigerant carries the heat to the outdoor condensing unit.
- Cool Air Circulation: The cooled air is distributed throughout the home via ducts.
- Heat Release: The condenser coil releases heat into the outdoor air.
An air conditioner alone cannot distribute cool air efficiently without an air handler or furnace. It relies on additional components to ensure proper airflow.
What Is an Air Handler?
An air handler unit (AHU) is a crucial component of an HVAC system that circulates and regulates indoor air. Unlike an air conditioner, an AHU does not generate cool air—it simply distributes it. It is essential for maintaining a consistent temperature throughout a home or building.
Components of an Air Handler
- Blower Motor: Pushes air through the duct system.
- Evaporator Coil: Works with the air conditioner to cool the air.
- Filter: Traps dust and debris to improve air quality.
- Dampers and Controls: Help regulate airflow and maintain indoor climate settings.
How an Air Handler Works
- Air Intake: The unit pulls in air from the return ducts.
- Filtration: Air passes through filters to remove dust and allergens.
- Temperature Regulation: The air is either cooled (if connected to an AC unit) or heated (if part of a heat pump system).
- Air Distribution: The blower motor pushes conditioned air through the ducts into the living spaces.
Air Handler vs. Furnace
Many people confuse an air handler with a furnace, but they have distinct functions:
- Furnace: Uses gas, oil, or electricity to generate heat.
- Air Handler: Moves air and uses an air conditioner or heat pump.
If your home has a heat pump system, it will use an air handler instead of a furnace.
Air Handler vs. Heat Pump
A heat pump is an HVAC system that provides both heating and cooling. It absorbs heat from outdoor air in winter and removes heat from indoor air in summer. An air handler works with a heat pump to circulate conditioned air efficiently.
Do You Need Both an Air Conditioner and an Air Handler?
Yes, in most cases. An air conditioner needs an air handler to circulate the cooled air throughout the home. If you have a heat pump, use an air handler instead of a furnace.
Choosing the Right System
- If you have an AC unit, you need an air handler to distribute the cool air.
- You have a furnace then; you may not need an air handler since the furnace blower distributes air.
- If you have a heat pump, you need an air handler to circulate cool and warm air.
Conclusion
Understanding the difference between an air handler vs ac unit is crucial for selecting the right HVAC system for your home. If you’re unsure about the best setup for your home, consult an HVAC professional to determine whether you need an air handler, furnace, or both for optimal comfort and efficiency.
At The Repair My Central Air, we specialize in HVAC system installations, repairs, and maintenance to ensure your home stays comfortable year-round. Whether you need an air handler, air conditioner, or complete HVAC solution, our expert team is here to help. Contact us today for a consultation!
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