Many homeowners think of their HVAC system as something that generates heating and air conditioning. That is correct, but the system handles more than just maintaining comfortable temperatures. It has to ensure the entire house can enjoy them, which is where the indoor air handler comes in. This crucial part of your HVAC system creates airflow for the ductwork as well as other important functions.

If you need a quality air handler in Quincy, MA, consider calling Aspinwall Plumbing & Heating. We work with top brands, pairing efficient equipment like Lennox air handlers with seamless installation. To help you make an informed decision, let’s go into a little more detail about how air handlers fit in with the rest of your HVAC system.

Lennox Air Handlers


The air handler is often called the indoor unit of your HVAC system and is installed and connected to your home’s ductwork. With a blower motor and fan, airflow is generated. This airflow accomplishes several things depending on what type of HVAC system is in your home.

If you have a central, forced-air HVAC system, your air handler is the furnace. Many models are built with the blower motor and fan, which are used without the heating elements during the cooling season. But for heat pump systems, the air handler provides both the heating and cooling airflow all year long.

Where Are Air Handlers Located?

While the exact location may depend on your type of HVAC system, most are installed indoors. They can be placed in the attic, basement or a utility closet. Central HVAC systems usually have a furnace that doubles as the air handler.


The air handler uses a blower motor and fan to draw air upward into the air ducts. During a heating or cooling cycle, it continues to run until the thermostat detects the set temperature. In fact, you can find the “fan” function on many thermostats. This can start the air handler without using a furnace or air conditioner. But it can also perform several other important functions, such as:

  • Filters out airborne particles: Your system’s air filter can be found here as well, trapping things like pollen, dust, animal dander and more.
  • Removes humidity: As the fan blows air over the evaporator coils, excess moisture is pushed out. This ensures indoor air conditioning is cool and dry.
  • Helps the transfer of heat: During the heating season, the air handling unit draws heat up toward the air ducts.

Do Air Handlers Have Filters?

Most air handlers will have filters in them since your home’s supply of airflow passes through this single piece of equipment. By placing the air filter in the air handler, it can trap airborne particles before they circulate through the rest of your home.

Lennox Air Handlers


Air handlers aren’t the most work-intensive part of your HVAC system compared to a furnace or air conditioner. The air filter works passively while the evaporator coil is controlled elsewhere. This leaves the blower motor and fan, which are very sturdy. And since the air handler is often a part of the furnace, you can often count on it to last as long as the furnace does.

In general, your air handling unit can last anywhere between 15 to 20 years. That can be extended if you invest in things like routine maintenance. Aspinwall Plumbing & Heating offers a comprehensive membership program that can help keep every part of your HVAC system in great shape.

Try a Lennox Air Handler with Aspinwall Plumbing & Heating Installation

The professional technicians at Aspinwall Plumbing & Heating work with top brands like Lennox for their efficient air handlers. When quality products are paired with professional installation, you can see the difference in the effectiveness of your HVAC system.

If you’re considering new or replacement installation, why not give us a call for a free quote? You can reach us at 833-501-3133.


Our goal is to ensure all our customers enjoy comfortable indoor air throughout the year while providing fair, honest, and expert service. No job is too big or too small for us to handle, and we will be at your door as soon as possible to get your situation remedied.



Professional home services should be affordable for every budget. Aspinwall Plumbing & Heating offers financing from Service Finance, with favorable interest rates and other terms. Alongside special discounts and our partnership with the Mass Save program, investing in your home is more affordable than ever.

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