Does an AC unit need an air handler?

Author: Danika Berge  |  Last update: Thursday, November 13, 2025

Usually, an air conditioner uses the furnace's blower motor, so no air handler is required. However, in environments where home heating is not required, an air conditioner may be the only HVAC equipment present. In this situation, the indoor air handler runs in conjunction with the outside unit, called the condenser.

Do all AC units need an air handler?

How Do I Know If I Need One? If you are in the market for a new HVAC system, and you are considering a conventional gas furnace and air conditioner, you most likely will not need an air handler. On the other hand, if you are considering an electric heat pump, an air handler will probably be part of your purchase.

Does every house have an air handler?

Not every house has an air handler. Air handlers are typically part of systems like central air conditioning systems that distribute conditioned air. Homes with other heating and cooling systems, such as window units or baseboard heaters, may not have an air handler.

What is the point of an air handler?

In the simplest terms, an air handler is a device that circulates conditioned air throughout your home. It is a critical part of your HVAC system, working closely with your air conditioner or heat pump to distribute cool or heated air.

What happens when an air handler goes bad?

We've already explained how a dirty air filter can cause weak air, but did you know that holes or large cracks in an air handler can also contribute to this problem? They can also contribute to reduced air quality by allowing mold and mildew to take root and grow.

Difference Between A/C, Air Handler, Furnace, Heat Pump, Minisplit, Etc.

What is the average cost to replace an air handler?

An air handler costs $1,500 to $3,400 to replace, depending on the ton size, brand, and type. Air handler prices are $700 to $1,600 for the unit alone, plus $800 to $1,800 for replacement labor. Air handler fan coil units from top brands like Trane, Carrier, and Lennox cost the most.

How do you know if you need a new air handler?

10 Signs It's Time To Replace Your HVAC System
  1. HVAC Unit Is 10+ Years Old.
  2. Blowing Warm Air Or Not Blowing Cool Air.
  3. Poor Or Weak Air Flow.
  4. Loud Or Unusual Noises.
  5. Humidity In The Home.
  6. Foul Odors.
  7. Leaks.
  8. Frequent Or Short Cycling.

Do you need an air handler in every room?

The number of heads needed for your home is determined by the number of rooms and layout of your home, things largely out of your control. So, the answer to this mini split FAQ is yes, you'll need a head installed in each room that's divided by a door (except your bathrooms) that needs heating and cooling.

What is the life expectancy of an air handler?

Your typical central air conditioning connected to an air handler and using ductwork can last as long as 30 years with good luck and maintenance but will generally need to be replaced somewhere between 10 and 20 years.

Does the air handler pull air from outside?

In short, no. Though in split system air conditioning design, commonly heat pumps, part of your system is located outside your home, it does not take in outside air. Outside air is brought into the system from an intake which is generally located by your furnace but is occasionally its own, separate system.

Where is the air handler on an AC unit?

The ac air handler is often located inside the home. It typically can be found in the garage, attic or closets. Two story houses often have two air handlers, on per level.

Should an air handler be running all of the time?

A constantly running HVAC fan can combat the number of bacteria and viruses within your home. According to the American Lung Association, the more your air circulates, the less chance the viruses have to spread. With air always on the move, bacteria and viruses can be pushed outside your home along with dirty air.

Do air handlers need a trap?

If you are using an air handler where the drain is on the negative side, you must have a trap.

Can you mix and match air handler and condenser?

If you combine a condensing unit with an air handler (or furnace) it wasn't designed to work with, in the best case the result will be reduced operating efficiency. In the worst case, the mismatched system may not work at all. Or, it may appear to run initially and then fail after a short time.

What is the difference between air handler and HVAC?

An air conditioner actively cools the air by removing the heat, while an air handler distributes the cool air around your home. An air handler works with your air conditioner, but it doesn't perform the same function. Some of the confusion arises from the fact that air handlers often contain coils.

Does an air handler use a lot of electricity?

The average unit has a 500 watt fan, which uses almost as much energy over the course of the year as a refrigerator, resulting in a $50/month bill. During the summer months, the ducts in your attic and close to your walls can fill with warm air, resulting in the fan blowing hot air into your house.

How much does a new air handler cost?

Air handler replacement averages $2,300, with most homeowners paying between $1,500 and $3,400. Unit costs vary from $600 to $2,100 or more depending on size, type, brand, and other factors. Hiring an HVAC technician for installation represents about 50% of total project costs.

Which AC brand lasts the longest?

Which HVAC Brands Last the Longest?
  • Mitsubishi Electric: Superior Efficiency and Durability. ...
  • Goodman Air Conditioning and Heating: Affordable and Long-Lasting. ...
  • Rheem: Reliable Performance for Decades. ...
  • Honeywell: Smart Home Integration and Durability. ...
  • Lennox: High-End Performance for the Long Haul.

Do you need an air handler?

If you own a furnace, you don't need a dedicated air handler because the furnace blower works to circulate air, both heated air and cooled air from your air conditioning system throughout your home. If you have a heat pump and not a furnace, then you may need a dedicated air handler to circulate the air.

Do all AC systems have an air handler?

The answer depends on what kind of heating and cooling system you have. If you have a traditional split system (with both a condenser and indoor components), then you need an air handler to circulate the conditioned air throughout your home.

How often should an air handler be cleaned?

Clean or change the air handler filter at least once a year — more if you have pets or seasonal allergies or asthma. Listen for excessive noise or vibrations. Be aware of odors coming from the air. Musty smells could be mold build up while burning smells may indicate an electrical problem with the motor.

Is it OK to put an air handler in the attic?

Attic Requires Proper Insulation

If you are going to install an AC handler in the attic, it is important that you have your attic properly insulated. Without proper insulation, cool air could be lost, and excess moisture could develop.

What happens when air handler goes bad?

The blower fan regulates the airflow. If the fan blades are damaged or obstructed, they won't perform their job properly leading to airflow issues and no cooling (in cooling mode). Fan blades are susceptible to damage as they rotate and if anything comes in contact with them, they may become bent or damaged.

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