The Shocking Truth About Air Handler Units: What You Need To Know

An air handler unit (AHU) is the central component of any heating, ventilation, and air conditioning (HVAC) system. It’s the workhorse that circulates and conditions the air within your home or building, ensuring a comfortable and healthy indoor environment.

Inside the Air Handler Unit

An AHU typically consists of the following components:

• Blower: A fan that circulates the air through the system.
• Coils: Heat exchangers that heat or cool the air.
• Filter: Removes impurities and allergens from the air.
• Plenum: A chamber that distributes the conditioned air throughout the building.
• Controls: Electronic components that regulate the operation of the unit.

Types of Air Handler Units

AHUs are classified based on their design and configuration:

• Horizontal: Mounted horizontally in the attic or basement.
• Vertical: Installed vertically in a closet or utility room.
• Upflow: Air is drawn upwards through the unit.
• Downflow: Air is forced downwards through the unit.

Functions of an Air Handler Unit

The AHU performs several crucial functions:

• Air Circulation: It circulates the air throughout the building, ensuring proper ventilation and air distribution.
• Temperature Control: The coils heat or cool the air, maintaining a comfortable temperature within the space.
• Humidity Control: Some AHUs include humidifiers or dehumidifiers to regulate the humidity levels.
• Air Filtration: The filter removes dust, pollen, and other contaminants from the air, improving indoor air quality.

Selecting the Right Air Handler Unit

Choosing the right AHU is essential for optimal HVAC performance. Consider the following factors:

• Capacity: The size of the unit should match the heating and cooling requirements of the space.
• Efficiency: Look for units with high energy efficiency ratings to minimize operating costs.
• Noise Level: Choose units with low noise levels for quiet operation.
• Features: Determine if you need additional features such as humidity control or air purification.

Installation and Maintenance of Air Handler Units

Proper installation and maintenance are crucial for the longevity and efficiency of your AHU.

• Installation: A qualified HVAC technician should install the unit according to manufacturer specifications.
• Maintenance: Regularly change the filter, clean the coils, and inspect the unit for any issues.

Benefits of Air Handler Units

AHUs offer several advantages:

• Improved Comfort: They provide consistent temperature and humidity levels, enhancing indoor comfort.
• Better Air Quality: The filter removes impurities, making the air cleaner and healthier to breathe.
• Energy Savings: Efficient AHUs reduce energy consumption, lowering operating costs.
• Increased HVAC System Efficiency: AHUs work in tandem with other HVAC components to optimize overall system performance.

Takeaways: The Unsung Hero of Your HVAC System

An air handler unit is the unsung hero of your HVAC system, quietly and efficiently conditioning the air in your home or building. By understanding its components, functions, and importance, you can appreciate the vital role it plays in creating a comfortable and healthy indoor environment.

Frequently Asked Questions

Q: What is the difference between an air handler and a furnace?
A: A furnace is a heat source that heats the air, while an air handler circulates and conditions the air.

Q: Can I install an air handler unit myself?
A: It’s not recommended to install an AHU yourself. Proper installation requires specialized knowledge and experience.

Q: How often should I change the filter in my air handler?
A: The frequency depends on the type of filter and the usage. Generally, change the filter every 1-3 months.