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What is an Air Handler?

What is an Air Handler?

Posted by
Ed Miller on Wed, Aug 28, 2013

Owning a home in Jacksonville FL can be challenging to your HVAC system, due to both heat and humidity.  There are several important parts to your heating and air conditioning system. One of these is the air handler. This component is responsible for circulating the conditioned air throughout your home. The air handler itself is a system of several related parts. These parts and their function are:


  • Return duct: The input to the air handler. The return duct carries air that has already circulated through your home.
  • Supply duct: The output from the air handler. The supply duct is the source of the air that circulates through your HVAC system.
  • Filter: Located near the return duct to protect all the downstream elements from harmful particles.
  • Heating & cooling elements: Many air handlers provide the ability to heat or cool the air passing through them. Often this is done through a use of successive heating and cooling coils. These coils can also be used to remove moisture from the air, called dehumidification.
  • Humidifier: To avoid uncomfortably dry air and static electricity, some air handlers add moisture to the air as it passes through.
  • Mixing chamber: Used to introduce outside air into the system to help ensure the right air temperature.
  • Blower: A large fan unit that pushes the air through the air handler and around the HVAC system.  Blowers are available in single speed or variable speed models to allow for greater flexibility of control.
  • Fan balancing: This can be accomplished by adding weights to the fan blades, or in larger units, specific balancing hardware.
  • Heat recovery device: Used to improve the efficiency of the air handler, but can also be used to increase capacity. There are several types of heat recovery devices, including thermal wheels and heat pipes.
  • Controls: Function that allows you to regulate the air handler. This can be a simple thermostat, or a more complex control system that is managed by a computer. The controls can be used to set the temperature, humidity and fan speed, depending on the model of your HVAC system.
  • Vibration isolators: The components of an air handler generate a lot of noise through vibration. These isolators usually come in the form of flexible ductwork immediately surrounding the air handler. Further sound dampening can be accomplished by mounting the fan on springs.

HVAC units come in two types. The smaller, integrated models are usually mounted in a window frame and contain all the elements necessary for air conditioning. Many homes use the second type, called a split-system that separates into an indoor section and an outdoor section. For this split system, the air handler is the indoor portion, and can be located in a basement, attic, or closet.

At Snyder Heating and Air Conditioning, we install, repair and maintain HVAC systems in the Jacksonville area. We schedule regular checkups for your system to catch any problems early and to make sure you are not spending extra money on your utility bills. Our trained technicians use the most current techniques and equipment to ensure your heating and cooling system is running at top efficiency. We service all brands such as Trane, Goodman-Amana, Carrier and Lennox. Our primary goal at Snyder is to exceed your expectations in all facets of customer service, and we welcome the opportunity to prove it!

Call us today to schedule your free estimate. Our showroom is open to the public, so feel free to stop by and we will give you a free demo on any of our products!


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where you’ll find snyder

Snyder Air Conditioning, Plumbing and Electric serves families across Florida. You'll find our technicians are just a short phone call away in neighborhoods throughout these counties:


  • Alachua
  • Baker
  • Clay
  • Duval
  • Flagler
  • Nassau
  • St. Johns


  • Broward
  • Martin
  • Miami-Dade
  • Palm Beach
  • St. Lucie

Customer Reviews

This was an exceptional experience! We woke up to our A/C on but not cooling (it was 6am and already 81 in the house). The person who set up our appointment was very nice, able to get us seen same-day, and let us know of some options to help save us money.

-Christy Cormier

The service from Sam and Chris was excellent! They were very knowledgeable and professional. They were able to answer all of my questions and completed all of my electrical issues. I will definitely use them again for future jobs. Thank you!

-Adrienne Beal

From the get go I could tell that the Snyder employees were truly professionals and didn’t push to make sales like other companies I’ve talked to my whole life. They took the time to explain so that I could make a decision. The installers and later the duct cleaners were very respectful during their work here. Thank you.

-Mike Daniels

Snyder Heating and AC is dependable, always on time and techs have always been courteous and knowledgeable. Emanuel was a great addition to the company. He was friendly and knew what he was doing. Thank you for great service.

-Linda Ackley

Snyder came in and did a total overhaul of our duct system. They had a great knowledge of what to do to make our home so comfortable! The technicians were all so professional and took great care of us! We’re so thankful for their expertise. Great and easy communication with the call center. We will definitely use them again!

-Crystal Hill

Snyder provided an amazing experience from start to finish. Most of us dread getting estimates with pressuring salespeople. Erik was a great guy, explained all my options and didn’t try to pressure me to act quickly! Justin followed up with my husband and I to offer further assistance in our decision. Again, no pressure, just helped with our follow up questions.

-Michele Bauer

Very prompt, professional, courteous, and cleaned up after repair. Had water line break in my front yard and no pressure. Very pleased and would highly recommend Snyder for all your plumbing, and AC needs. Thank you for making a rough morning get better with ease and professionalism.

-Chuck Jr.

Snyder was easy to get in contact with and had availability the next day. Clint came out and needed some parts so had to reschedule us for the next day for installation. He did a great job converting our old 3 knob shower to one. Looks great! Professional and courteous. 100% recommend this company, especially Clint.

-Nicole Hansen

Very thorough and professional Job

-John Ridenour

Excellent work. Hard worker. Highly recommend.

-Andre A

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With our highly-skilled technicians & upfront pricing, you can trust the local Jacksonville, FL experts at Snyder Air Conditioning, Plumbing & Electric for 100% satisfaction, guaranteed on all Air Conditioning Repairs.