An air handler is the indoor part of an HVAC system that circulates heated or cooled air through ductwork. It contains a blower, evaporator coil, and filter to move, condition, and clean the air. Working with a heat pump or AC, the air handler delivers comfort throughout your home.
What Is an Air Handler?
An air handler, also called a fan coil unit, is a cabinet that houses key HVAC components. It differs from a furnace because it does not create heat on its own.
Instead, it circulates conditioned air supplied by a connected outdoor unit such as an air conditioner or heat pump. The air passes through the system, filtered and conditioned, before moving through ducts to keep the home comfortable.
How Does an Air Handler Work?
An air handler works by moving and conditioning air inside the home.
Blower Motor and Fan
The blower motor powers the fan that pushes air through ductwork. Options include single speed, multi-speed, and variable-speed motors. Variable-speed models provide better energy efficiency and more consistent airflow.
Evaporator Coil
The evaporator coil absorbs heat during cooling cycles. When paired with heat pumps, the coil also helps deliver heating.
Air Filter
The air filter removes dust, pollen, and allergens from the air. This protects the HVAC system and improves indoor air quality.
Optional Heat Strips and Accessories
Some air handlers include electric resistance heat strips for colder days. Accessories like humidifiers, UV lights, or air purifiers may also be installed to help maintain humidity levels and improve air quality.
Why Is an Air Handler Important?
The air handler circulates heated or cooled air evenly through your home. It helps maintain air quality with filtration and supports energy efficiency with variable-speed technology. Without it, a ducted heat pump or air conditioning system could not move air throughout your home.
Types of Air Handlers
There are different types of air handlers designed to match home needs.
Single-Speed vs Variable-Speed
Single-speed models run at one speed and are more affordable but less efficient. Variable-speed models adjust airflow, improving comfort, energy efficiency, and noise levels.
Air Handler vs Fan Coil Unit
An air handler and a fan coil unit are often seen as the same. However, fan coil units are usually smaller.
They are used in zoned or compact spaces. Both circulate conditioned air and connect with outdoor units.
Where Air Handlers Are Used
Air handlers are common in central AC systems, heat pump systems, mini splits, and geothermal setups. They are key to moving cooled air or heated air through ductwork.
Benefits of a Modern Air Handler
Modern air handlers offer more than basic airflow.
- Even comfort across rooms
- Lower energy bills
- Cleaner indoor air
- Quiet operation
Common Air Handler Problems
Air handlers may develop issues over time.
- Clogged filters
- Blower motor failure
- Frozen coils
- Condensate drain issues
- Symptoms: weak airflow, leaks, strange noises
Air Handler Maintenance Tips
Regular care improves efficiency and extends service life.
- Replace filters regularly
- Schedule seasonal tune-ups
- Keep unit area clean
- Inspect coils and blower
How Long Do Air Handlers Last?
Air handlers typically last 15 to 20 years. Lifespan depends on system quality, usage, and maintenance. Signs it may be time for replacement include rising energy bills, weak airflow, and frequent repairs.
FAQs About Air Handlers
Is an air handler the same as a furnace?
No. A furnace makes heat. An air handler moves conditioned air and may use electric strips for extra heat.
Do all HVAC systems have air handlers?
No. Homes with furnaces may not have one. Heat pumps and air conditioners rely on air handlers.
How much does an air handler cost?
Installation ranges vary based on size, features, and efficiency. Prices depend on matching the air handler to the rest of the HVAC system.
Can I run my AC without an air handler?
No. The air handler is necessary to circulate conditioned air through ducts.
Expert HVAC Services in Ft. Worth
Comfort Experts handles all types of HVAC systems, including AC units, heat pumps, and mini split ductless systems. If you need to repair or replace your air handler, we can help.
We serve Ft. Worth and nearby communities. Comfort Experts is the home of the AC Genius, ready to keep your home comfortable year-round.
