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Understanding Evaporator Coils in Your HVAC System

ICSNY • Mar 01, 2024

Evaporator coils are a critical component of your home's HVAC system, playing a key role in cooling and heating your space efficiently. Located within the air handler or attached to the furnace, these coils are where the heat exchange process begins, setting the stage for comfortable indoor temperatures year-round. Learn more about what evaporator coils are, their function, and how to ensure they are working optimally for your comfort.

What Is an Evaporator Coil?

Evaporator HVAC coils are essential to air conditioning units and heat pumps, designed to absorb heat from the air inside your home. These coils house the refrigerant that becomes cold after compression, awaiting the warm air that your HVAC system pulls from the interior of your space. As air moves over these coils, the refrigerant captures the heat, leaving cooler air to be redistributed back into your home.



The location of these coils within your HVAC system allows them to absorb heat from your home efficiently. Evaporator coils must be kept in reasonable condition to ensure adequate cooling. Their ability to transfer heat directly affects your system's efficiency and, ultimately, your comfort and utility costs.

The Role of HVAC Evaporator Coils in Cooling and Heating

In the cooling process, evaporator coils work with condenser coils to complete the heat exchange cycle that cools your home. The evaporator coil absorbs indoor heat and transfers it to the outdoor condenser coil, where it is released. This continuous cycle ensures that your home remains at the correct temperature.


For heat pumps, the role of the evaporator coil is reversible depending on the season. In winter, the process is inverted, and the coil releases heat into your home instead of absorbing it. This versatility makes the heat pump evaporator coil a key component in providing year-round comfort.

Maintenance and Troubleshooting of Your Evaporator HVAC Coils

Keeping evaporator coils clean and free of debris is essential for maintaining your HVAC system's efficiency. Dirt and dust accumulation can insulate the coil, hindering its ability to absorb heat and causing your system to work harder. Regularly scheduled maintenance with our team can prevent this, ensuring your system operates at peak efficiency.


Signs of issues with your evaporator coil include reduced cooling efficiency, longer cooling cycles, or the presence of ice on the coil itself. These symptoms can indicate a variety of problems, from refrigerant leaks to airflow obstructions. If you notice any of these signs, it's crucial to contact a us for troubleshooting and repair.

Choosing the Right Evaporator Coil for Your HVAC System

  • Compatibility: Ensure the evaporator coil is compatible with your HVAC system to maximize efficiency and performance. Incompatible coils can lead to reduced efficiency and increased wear on your system.
  • Efficiency Ratings: Higher efficiency coils can significantly reduce energy consumption and lower utility bills. Investing in a high-quality coil can offer long-term savings and improved system performance.
  • Professional Consultation: Consulting with HVAC professionals like those at InterCounty Supply can provide you with insights into the best evaporator coil for your system. Our expertise ensures you get a coil that meets your needs.
  • Material: The material of the evaporator coil affects its durability and efficiency. Aluminum coils, for example, are resistant to corrosion and offer excellent heat transfer properties.
  • Warranty and Support: Choose evaporator coils with strong warranties and support from reputable manufacturers. This ensures you're covered in the event of any defects or issues.

Let InterCounty Supply Address All of Your Needs for Evaporator Coils

InterCounty Supply is your go-to source for all things related to evaporator coils. Whether you're in need of maintenance, troubleshooting, or a complete coil replacement, our team of experts is here to ensure your HVAC system operates smoothly and efficiently. Contact us today to learn more about how we can enhance your home's heating and cooling system.

Homeowner Looking For Reliable Heating, Cooling Or Plumbing Supplies?

Our dedicated specialists are standing by to help.

Most homeowners in need of new heating or cooling equipment will do an internet search to get information. Such a search will typically yield two results: what to buy or where to buy but not why to buy. At InterCounty Supply, as a wholesale supply house, we present all the options for what to buy and why it would be the best choice for YOUR situation. After all the options are presented a homeowner can decide for themselves what they need. ICS then has a licensed, factory trained contractor who SPECIALIZES in the equipment you need come to your home to provide the complete installation cost for the equipment you need. ICS will also handle all the paperwork for any rebates that are applicable.


Have questions, give us a call 914-939-4350 or fill out the form and one of our specialists will be in touch shortly.


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