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HVAC Education, Evaporator Coils

Evaporator Coils vs. Condenser Coils

Have you been asking yourself what are evaporator coils vs. condenser coils? The world of HVAC systems can be complex and understanding the distinctions between these two crucial components is essential. In this article, we will dive into the intricate workings of evaporator coils vs. condenser coils.

a condenser coil sits outside of a home

What is a coil in an air conditioner?

off, let’s answer the question “What is an evaporator coil in an air conditioner?” In an air conditioning system, a coil refers to a component that plays a crucial role in the cooling process of your home. The coils in AC systems are typically made of copper or aluminum. These materials offer excellent heat transfer properties and durability, making them suitable for a coil’s function. Air conditioning systems typically have two types of coils: the evaporator coil and the condensing coil.

What is an AC evaporator coil?

Now let’s answer the question “What is an AC evaporator coil?” The evaporator coil is located inside the indoor unit of an air conditioning system. The coil contains a network of tubes that are often made of copper or aluminum and are responsible for absorbing the heat from indoor air. As the refrigerant passes through the coil, it undergoes a phase change from a liquid to a gas. This process absorbs heat from the surrounding air, thereby cooling it down. The cooled air is then circulated back into the room.

What is a condenser coil?

Now let’s explain “What is a condenser coil?” The condenser coil is in the outdoor unit of an air conditioning system. Its primary function is to release the heat that was absorbed by the evaporator coil. The condenser coil consists of a network of tubes, like the evaporator coil. When the refrigerant, now in a hot gaseous state, flows through the condenser coil, it releases the absorbed heat to the outside environment. This heat transfer process causes the refrigerant to condense back into a liquid form. The condensed refrigerant is then pumped back to the evaporator coil to repeat the cooling cycle.

How Do AC Evaporator Coils and Condenser Coils Work Together?

Refrigerant enters the evaporator coil from through copper tubing that is connected to your outdoor unit. Once inside, it absorbs the heat from the air blowing over it. Moisture in the air is condensed into water on the coils, which then empties into the drain pan. Removing this moisture lowers the temperature of the air blown into your home, creating a more comfortable environment.

The now-warm refrigerant flows to the outdoor unit. The refrigerant then runs through the condenser coil, where the heat is expelled to the outdoor air. The refrigerant then travels back inside to the evapcoil to repeat the process.

a carrier dealer explains an evaporator coil vs condenser coil to a homeowner

Learn More About Air Conditioner Evaporator Coils and Condenser Coils

Schedule an appointment with your local Carrier dealer to get all of your coil questions answered and to get a Carrier HVAC system installed at your home. Carrier dealers provide standout installation, maintenance, and service.

Frequently Asked Questions About Evaporator and Condenser Coils
It is not recommended to use evaporator coil cleaner on condenser coils unless the cleaner is specifically labeled for both. Evaporator coil cleaners are often designed for indoor use and may not be strong enough to handle the dirt, grease, and debris that accumulate on outdoor condenser coils. Using the wrong cleaner could reduce effectiveness or damage the coils.
AC evaporator coils are located inside the home, typically within or near the fan coil or furnace.
It is highly recommended to replace the evaporator coil when replacing the condenser. Mismatched coils can lead to efficiency issues, reduced system performance, and increased wear on the new condenser. To ensure proper compatibility and energy efficiency, both components should ideally be replaced together, especially if the system is older.
No, evaporator and condenser coils are not the same. The evaporator coil is located inside the home and absorbs heat from indoor air, cooling it as refrigerant evaporates inside the coil. The condenser coil is located outside the home and releases heat absorbed from indoors by condensing the refrigerant back into a liquid.
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