Air Handler Unit for HVAC Systems

By Travis Baugh

If you're seeking information about air handlers for HVAC systems, you've arrived at the right place. This article offers a comprehensive overview of air handlers, including their key components, common issues, operational mechanics, and the benefits of choosing Carrier air handlers. Understanding air handlers is vital for maintaining a comfortable indoor environment. Let's dive in and explore everything you need to know about air handlers!

What is an Air Handler?

An air handler unit, also known as a fan coil is a crucial component of an HVAC (Heating, Ventilation, and Air Conditioning) system, responsible for circulating conditioned air throughout your home. The primary function of an air handler unit is to regulate and distribute both heated and cooled air produced by the HVAC system.

Typically located indoors, air handler units connect to ductwork that runs throughout the home. They work in tandem with other HVAC components, such as the furnace, air conditioner, or heat pump, to ensure that air is properly filtered, conditioned, and distributed.

Air handler units feature a fan that helps circulate the air. This fan can be set to different speeds to control airflow and provide optimal comfort. Additionally, the air handler unit contains a heating element, cooling coil, and a drain pan to collect any condensation formed during the cooling process.

Overall, air handler units are essential for maintaining a comfortable and healthy indoor environment, ensuring that conditioned air reaches every room in your home, providing consistent temperature control and improved air quality.

Key Components of an Air Handler Unit

Understanding the key components of an air handler unit can help you make informed decisions regarding HVAC maintenance and upgrades. Let's take a closer look at three important components:

Evaporator Coil and Condenser Coil

The evaporator coil absorbs heat from the indoor air, while the condenser coil releases heat to the outdoor environment. These coils work together to cool and dehumidify the air before it is distributed throughout your home.

Blower Motor and Fan

The blower motor powers the fan, which circulates conditioned air through the ductwork and into various rooms, ensuring even air distribution throughout your home.

Air filter

The filter traps dust, debris, and other particles from the air, preventing them from circulating into the home. It helps maintain indoor air quality and protect the system components from damage.

Damper

Dampers control the flow of air within the air handler, directing it to various areas of the building based on the heating or cooling needs. These can be manual or automated.

Drain Pain and Condensate Drain

The drain pan collects moisture condensed from the air as it passes over the evaporator coils. The condensate drain directs this moisture out of the system to prevent water damage.

Optional Electric Heat Strip

With an optional electric heat strip, a fan coil can also provide heat to your home if you live in milder climates.

By understanding these key components, you can better appreciate the importance of regular maintenance and proper functioning. If you're experiencing issues with your air handler unit or considering an upgrade, contact your local Carrier dealer for professional assistance. Our range of air handlers is designed to provide reliable performance and exceptional comfort for your home.

Common Air Handler Problems

A properly functioning air handler unit is crucial for the overall performance of your HVAC system. However, like any mechanical equipment, air handler units can experience issues over time. Understanding common air handler problems can help you identify and resolve them efficiently. Here are a few common issues to be aware of:

Clogged Air Filters

Clogged air filters are a common problem, restricting airflow and causing your HVAC system to work harder and less efficiently. This not only reduces system performance but can also lead to higher heating and cooling bills. Regularly checking and replacing air filters can help maintain optimal airflow and improve indoor air quality. Learn more about how to replace air filters and how often to replace air filters.

Faulty Blower Motors and Their Troubleshooting

Faulty blower motors can lead to reduced airflow, uneven heating or cooling, and unusual noises. Troubleshooting may involve checking for power supply problems, loose connections, or worn-out motor bearings. Professional assistance is recommended for motor repairs or replacements.

Condensate Drain Issues and Maintenance

Air handlers produce condensation that is drained through a condensate drain line. Over time, the drain line can become clogged with debris, leading to water leaks and potential water damage. Regular maintenance, such as inspecting and cleaning the condensate drain line, can prevent these issues and ensure proper drainage.

By understanding these common air handler unit problems and their solutions, you can take proactive measures to keep your HVAC system running smoothly. Regular maintenance and professional inspections can help identify and address any issues before they become major problems.

How Air Handler Units Work

Air handlers play a crucial role in HVAC systems, ensuring optimal air circulation, temperature control, humidity regulation, and air distribution. Understanding how air handlers work can help you make informed decisions for your residential HVAC needs.

Air Circulation and Temperature Control

Air handlers pull in air from the surrounding environment through return ducts. This air is passed through filters to remove impurities and allergens. The conditioned air is then heated or cooled to achieve the desired temperature using a heating or cooling coil. The air handler unit's blower pushes the conditioned air back into living spaces through supply ducts.

Humidity Regulation and Dehumidification

Air handlers help regulate humidity levels in your home. The cooling coil within the air handler removes moisture from the air, reducing humidity. In humid climates, air handlers equipped with dehumidification features can further enhance indoor comfort by removing excess moisture from the air.

Air Distribution and Zoning

Air handlers ensure efficient air distribution throughout your home. They can be connected to a network of ducts that deliver conditioned air to different rooms or zones. By controlling the airflow to each zone, air handlers enable temperature customization and energy efficiency.

Connect With Your Local Carrier Dealer On Air Handlers

At Carrier, we offer a range of air handlers designed to meet your specific residential HVAC requirements. Our air handler units are engineered for superior performance, reliability, and energy efficiency. If you're looking for an air handler that provides optimal air circulation, temperature control, humidity regulation, and air distribution, explore our range of air handlers.

Frequently Asked Questions About Air Handlers

What is an air handler HVAC?

An air handler in HVAC is a device that circulates air throughout a home and can also affect your indoor humidity. It contains components like a blower, filter, and heating/cooling coils to condition and distribute air. Air handlers are essential for heating and cooling systems.

Is an air handler the same as a blower?

No, an air handler is not the same as a blower. The air handler is a complete unit that includes the blower, along with other components like filters, coils, and sometimes heating elements. The blower is simply the fan within the air handler that circulates the air throughout the system.

How do you know if your air handler is bad?

Signs of a bad air handler include no airflow, unusual noises (like banging or grinding), inconsistent temperature, or frequent system cycling. If the air handler is not blowing air or your HVAC system isn't cooling or heating properly, it may need repair or replacement.

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.

Should my air handler have a filter?

Yes, your air handler should have a filter. The filter helps trap dust, debris, and allergens, improving air quality and protecting the system's components from damage. Regularly changing the filter is essential for optimal performance.

Does the air handler unit go inside or outside?

The air handler unit is typically installed indoors, often in basements, attics, or utility closets.

Can an air handler freeze up?

Yes, an air handler can freeze up. This usually occurs due to restricted airflow, low refrigerant levels, or a dirty coil. A frozen air handler can reduce system efficiency and cause damage if not addressed promptly.

How long does an air handler last?

An air handler typically lasts between 15 to 25 years, depending on factors like usage, maintenance, and the quality of the unit. Regular maintenance can help extend its lifespan.

What is another name for an air handler?

Another name for an air handler is a fan coil. This term specifically refers to the component that uses a fan to circulate air over a coil (heated or cooled) to adjust the air temperature.

Can I just replace the air handler?

You can replace just the air handler if other components like the furnace or condenser are still in good condition. However, ensure compatibility with your existing system for optimal performance and efficiency.

Does the air handler pull air from outside?

Typically, the air handler does not pull air from outside. It circulates indoor air through the HVAC system. Fresh outdoor air is usually introduced via a separate intake system or ventilation unit.

Should an air handler be running all of the time?

An air handler should not run all the time. It operates as needed to maintain desired temperature and airflow. Constant operation may indicate an issue, such as an oversized unit or improper settings.

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

Yes, it's generally okay to install an air handler in the attic, as long as it's properly insulated, has adequate ventilation, and is easily accessible for maintenance. Ensure the attic is dry to prevent damage to the unit.

Where to put an air handler in a house?

An air handler is typically placed in basements, attics, or closets, depending on space availability. It should be in a well-ventilated, accessible location for maintenance and efficient airflow throughout the home.