About The Author: Travis Baugh is a Digital Brand Marketing Manager for Bryant, where he creates clear, helpful content to guide homeowners through heating, cooling, and indoor air quality decisions. His goal is to empower readers with the knowledge they need to choose the right comfort solutions for their home—confidently and comfortably.
What Is An Air Handler?
An air handler — also called a fan coil — is the indoor component of an HVAC system that circulates heated or cooled air throughout your home. It pairs with a heat pump or air conditioner to filter air, regulate humidity, and distribute climate-controlled air through your ductwork.
At Bryant, delivering true comfort means building air handlers that go beyond the basics. Bryant air handlers are available with features such as variable-speed blower motors, humidity management, and multipoise installation options.
How Does An Air Handler Work?
Bryant air handlers work by moving indoor air across a coil to condition it, then using a blower motor to push that air through your home's ductwork. In a typical central heat-pump system, the indoor air handler contains the blower and indoor coil, while the outdoor unit contains the compressor
Without an air handler, the warm or cool air your heat pump or air conditioner produces has no way to travel through your home. The air handler moves that conditioned air through the duct system, helping distribute heating and cooling throughout the home.
“The air handler is basically the HVAC system's lungs,” Samantha Houchin, owner of The Weather Changers in Denver, Colorado, said. “It pushes the air out and moves it through the system. Without it, you wouldn’t have anything to circulate air throughout the house.”
Key Components of an Air Handler
An air handler typically contains several components that work together to move and condition air:
| Component | What It Does |
| Blower motor | Moves conditioned air through the home's ductwork. Bryant offers air handlers with variable-speed and multi-speed blower motors. |
| Evaporator coil | Transfers heat between the indoor air and the refrigerant during cooling and, depending on the system, heating operation. |
| Air filter | Captures airborne particles before air is circulated through the system and helps protect internal equipment from debris. Bryant's FE5B, for example, accommodates standard-size filters. |
| Thermostatic expansion valve (TXV) | Controls refrigerant flow into the evaporator coil. Bryant's FE5B uses a refrigerant-specific thermostatic expansion valve. |
| Condensate pan and drain | Collects and removes water produced when moisture condenses on the evaporator coil during cooling |
What Does an Air Handler Do? Key Functions Explained
Air handlers are designed to provide air distribution, heating and cooling support, and humidity management when properly matched with compatible equipment and controls.
Air Circulation
The blower motor inside the air handler pushes conditioned air through your ductwork. Whether it's the middle of a freezing winter or a sweltering summer, the air handler helps distribute conditioned air throughout your home.
Variable-speed air handlers can adjust blower operation rather than operating only at a single fixed speed. Bryant's FE5B uses a high-efficiency, variable-speed ECM blower motor and provides a nominal airflow rate of approximately 350 CFM per ton when operating in its standard system configuration.
Air Filtering
Before air is heated or cooled, it passes through an internal filter inside the air handler. The filter helps capture dust and other airborne particles while helping protect the system from debris buildup. Bryant's FE5B accommodates standard-size filters.
For higher levels of filtration, Bryant also offers dedicated air-cleaning products that can be installed with compatible fan coils and furnaces. For example, Bryant's MERV 13 FNCCAB mechanical air cleaner is rated to capture more than 90% of airborne particles as small as 3.0 microns.
Humidity Control
Air handlers can play a role in managing indoor moisture levels. During cooling, moisture can condense on the evaporator coil as warm indoor air passes across it. Bryant's Evolution FE5B includes improved humidity-control capabilities when properly matched with compatible equipment and controls.
Learn more about what humidity should my house be at?
What Are the Types of Air Handlers?
Air handlers can be installed in upflow, downflow, or horizontal configurations, depending on the equipment design, available space, and ductwork layout. Bryant's FE5B is a multipoise air handler that can be installed in all three orientations.
| Air Handler Type | Airflow Direction | Typical Installation |
| Upflow | Bottom to top | Basements, utility rooms, and other spaces where supply ductwork is above the unit |
| Downflow | Top to bottom | Attics or other installations where supply ductwork is below the unit |
| Horizontal | Side to side | Attics, crawl spaces, and locations with limited vertical clearance |
Airflow capacity is determined by the specific air-handler model, size, matched outdoor equipment, and operating mode—not simply by whether the unit is upflow, downflow, or horizontal. For example, Bryant's FE5B is available in sizes covering 18,000 to 60,000 BTUH, with nominal airflow configurations ranging from approximately 525 to 1,750 CFM, depending on unit size and operating condition.
Upflow Air Handler
Best for: Basements and utility spaces where supply ductwork is above the air handler.
An upflow air handler pulls air in from the bottom and pushes conditioned air upward into supply ducts above. This configuration can be used when the home's ductwork layout supports upward airflow.
Downflow Air Handler
Best for: Attics and upper-level utility closets.
A downflow air handler operates in reverse — pulling air in from the top and directing it downward into ductwork below. The installation must follow the specific air handler's approved configurations and manufacturer's requirements.
Horizontal Air Handler
Best for: Tight attics or crawl spaces with limited vertical clearance.
This unit lies on its side and moves air laterally. A horizontal configuration can be useful when a vertical installation is impractical because of limited clearance.
Choosing between types: An upflow unit can work well when supply ductwork is above the air handler, while a horizontal unit can be useful when vertical space is limited. A Bryant dealer can evaluate your ductwork, available space, system compatibility, and heating and cooling requirements to determine the appropriate configuration.
Why Choose a Bryant Air Handler?
Bryant air handlers are designed to provide efficient air distribution, system compatibility, humidity management, and flexible installation options. Bryant's current lineup includes variable-speed ECM, multi-speed ECM, and other blower-motor configurations, depending on the model.
- Variable-Speed Technology: The Bryant FE5B uses a high-efficiency, variable-speed ECM blower motor to provide controlled airflow.
- Energy Efficiency: The FE5B can provide cooling-cost savings of up to 16% and heating-cost savings of up to 10% when properly matched and installed as part of a compatible system.
- Humidity Management: The FE5B includes improved humidity-control capabilities for added comfort during cooling operation.
- Flexible Installation: The FE5B has a multipoise design that supports upflow, downflow, and horizontal installation configurations.
- Durability: Select Bryant air handlers feature galvanized-steel cabinets and corrosion-resistant construction features designed for long-term use.
Connect With A Bryant Dealer On Air Handlers
Choosing the right air handler is about more than picking a model — it's about finding the right fit for your home's layout, ductwork, heating and cooling requirements, and compatible outdoor equipment. A local Bryant expert can help you select the appropriate configuration, whether you need a variable-speed unit for controlled airflow or a horizontal model for a space with limited vertical clearance. Schedule an appointment today to find the perfect match for your home’s comfort needs.
Explore Bryant Air Handlers
Choose a Bryant air handler for efficient and reliable air distribution in your home. Designed for seamless compatibility with Bryant heating and cooling systems, these air handlers ensure optimal comfort year-round. With features like variable-speed motors and quiet operation, Bryant air handlers provide consistent airflow while improving energy efficiency. Their durable construction and flexible installation options make them a smart, long-lasting choice for maintaining a comfortable and healthy indoor environment in any season.
Air Handler FAQs
An air handler circulates conditioned air throughout your home by housing components like the blower fan, coils, and filters, and works with your HVAC system to maintain comfort.
Another name for an air handler is a fan coil.
Yes, most ducted heat pump systems require an air handler to distribute heated or cooled air, unless you're using a ductless mini-split system with individual indoor units.
If an air handler goes bad, you may experience poor airflow, inconsistent temperatures, strange noises, or a complete loss of heating or cooling in your home.
An air handler and a blower are related but not exactly the same. The air handler is a broader term that refers to the entire unit responsible for circulating and conditioning air throughout your home (the filters, coils, and blower), while a blower is just one component inside the air handler – a motorized fan that moves the air through the HVAC system and into the ducts.
The air handler should run whenever your heating or cooling system is actively working to maintain your home’s temperature. For example, when your thermostat signals that the home is too cold or too hot, the air handler helps circulate the conditioned air through the ducts.
Some homeowners choose to run the air handler on a continuous fan mode to improve air circulation, maintain more consistent temperatures, or enhance indoor air quality. This can be especially helpful in larger homes with multiple rooms, as it helps distribute air more evenly.
Running the air handler all the time can increase energy use, as it consumes electricity and puts wear on the system. In most cases, it’s more energy-efficient to allow the air handler to cycle on and off as needed, in response to temperature changes or thermostat settings.
If a home uses a furnace for heating and an air conditioner for cooling, the system usually includes an air handler. The air handler houses the blower fan, heating coils, and possibly a cooling coil (depending on the system) to circulate conditioned air through ducts.
Homes with a heat pump for heating and cooling will also generally have an air handler. The air handler works with the heat pump to distribute heated or cooled air through the home’s ductwork.
If a home has a ductless mini split system, each indoor unit typically serves as its own air handler, so there isn’t a need for a central air handler.
Homes with radiant heating (such as in-floor heating) often don’t use air handlers because the heat is delivered through warm floors or panels rather than forced air.
An air conditioner cools refrigerant, while an air handler circulates that cooled air through the ductwork in your home.
A heat pump both heats and cools by moving heat energy, while an air handler distributes the conditioned air produced by the heat pump or AC.
Not always, but replacing both together ensures matched components for better performance and energy efficiency.
It typically looks like a tall indoor cabinet connected to ducts and refrigerant lines, often installed in a utility room, basement, or attic.
