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Different Types of Aircon Coils and Their Uses

Air conditioners keep rooms cool using two main types of coils: evaporator coils that take heat from inside and condenser coils that throw it outside. These coils, often made of copper or aluminum alloy, play a big part in how well air conditioners work.

Yet, when these coils gather dust and dirt, they can leak and make the AC less effective, raising costs. Getting an expert to check and clean these coils every year helps keep them working right, saving money on running costs over time.

Dirty or broken coils might show signs like more noise or hotter air coming out of vents. A company called Energy 1 Heating & Air Conditioning offers help with this in Lorain, Ohio, pointing out how vital coil care is for both energy savings and cleaner indoor air.

Just washing outdoor coils with water can greatly improve an air conditioner’s performance by stopping overheating and cutting down on power use.

Ready to learn more? Keep reading!

Understanding the Role of Coils in Air Conditioners

Coils play a key role in air conditioners by managing temperature and humidity. The process starts with the evaporator coil absorbing heat from indoor air, making it cooler. Meanwhile, condenser coils release absorbed heat outside.

This cycle of heat absorption and release helps keep your home comfortable.

Dirt and dust can clog these coils, reducing their efficiency. To ensure your air conditioner runs smoothly, regular cleaning is vital. Keeping coils clean boosts energy efficiency and indoor air quality.

Next up, let’s explore the evaporator coil – its functions are crucial for cooling your home effectively.

The Evaporator Coil

The evaporator coil plays a crucial role in absorbing heat from your home’s air. It works hand in hand with the cooling agents to deliver a fresher indoor environment.

Function and Importance

Evaporator coils play a crucial role in cooling your home. They absorb heat from the indoor air, causing refrigerant to turn into warm vapor. This process is essential for creating a comfortable indoor environment during hot weather.

Without these coils working properly, your air conditioner wouldn’t be able to pull the warm air out of your house.

These components are also vital for energy efficiency. By efficiently absorbing heat, they help reduce operating costs and save money on energy bills. Proper maintenance ensures that evaporator coils continue to function effectively, supporting the heating and cooling system in maintaining optimal performance throughout its lifespan.

The Condenser Coil

The condenser coil plays a crucial role in the outdoor unit of central air-conditioners. It takes warm vapor from the evaporator coil and lets it out into the outdoor air. This process turns the vapor back into a liquid, which is essential for keeping your home cool and comfortable.

Keeping this coil clean is vital. Dirt and dust can build up, making it less efficient. Refrigerant leaks are also a concern that needs prompt attention. Yearly checks by an HVAC technician can prevent these issues, ensuring your system runs smoothly.

Moving on to common problems with air conditioner coils highlights why regular maintenance is so important.

Common Issues with Air Conditioner Coils

Air conditioner coils play a crucial role in heating and air conditioning systems. They manage temperature and humidity, ensuring a comfortable indoor environment. Here are common issues that can affect these vital components:

  1. Dirt and Dust Build-up: Coils can accumulate dust and debris over time, reducing their efficiency. The evaporator coil, located near the air handler, is particularly prone to this issue due to its role in absorbing heat from indoor air.
  2. Clogged Air Filters: When air filters become clogged, airflow to the coils decreases. This makes it harder for the evaporator coil to absorb heat, affecting the unit’s ability to cool the space.
  3. Refrigerant Leaks: Both evaporator and condenser coils are part of the refrigeration cycle where coolant flows through copper tubing. If there are leaks, it means less refrigerant is available to transfer heat and cool your home.
  4. Corrosion: Coils are made of materials like copper tubing which can corrode over time due to exposure to moisture or chemicals. Corrosion-resistant coatings help but can wear out or become damaged.
  5. Mould Growth: The combination of moisture from condensation and organic material in the dust can lead to mould growth on coils. Besides being a health hazard, mould restricts airflow and reduces system efficiency.
  6. Blocked Condensate Drains: If the drain lines from your HVAC equipment get blocked, water backs up and may cause water damage or high humidity levels near the coils promoting rust or corrosion.
  7. Frozen Coils: Poor ventilation or low refrigerant levels can cause evaporator coils to freeze over. As ice builds up, it blocks air flow even further leading to system breakdowns or inefficient cooling.
  8. Energy Inefficiency: Dirty or damaged coils work harder to cool your home, leading to higher energy bills and reduced comfort levels due to inconsistent temperatures.

Regular maintenance by an HVAC professional ensures these issues are addressed promptly for effective functioning of your heating and cooling system.

Importance of Regular Coil Maintenance and Cleaning

Keeping aircon coils clean and well-maintained is key to a high-performing HVAC system. Dirt, dust, and debris can build up over time, making the system work harder than necessary.

This not only increases energy use but can also lead to poor indoor air quality. Clean coils ensure your home stays cooler without racking up high electricity bills.

Scheduled cleaning prevents refrigerant leaks and other potential issues that impact cooling performance. Simple actions like washing outdoor coils with water and changing air filters regularly make a big difference.

These tasks improve your HVAC’s efficiency and effectiveness, ensuring it runs smoothly year-round.

Moving on, understanding common problems with air conditioner coils helps in identifying when maintenance is needed.


Understanding the roles and uses of aircon coils, specifically evaporator and condenser coils, is key in maintaining an efficient HVAC system. These components play crucial roles in absorbing indoor heat and releasing it outdoors, contributing significantly to cooling performance and energy efficiency.

Regular maintenance ensures these systems run smoothly, keeping costs down and indoor air quality high. Familiarity with common coil issues encourages timely interventions, preventing larger problems.

Proper care of your HVAC unit’s coils supports a comfortable home environment throughout the year.

For more insightful information on optimising your air conditioning system, consider reading our article on understanding the basics of aircon thermostats.


1. What are the main types of coils in air conditioning systems?

In HVAC systems, there are two main types of coils: the evaporator coil, often found in the indoor air handler, and the condenser coil, located in the condenser unit outside. These coils play crucial roles in cooling your home efficiently.

2. How does an evaporator coil work?

The evaporator coil works by absorbing heat from indoor air that passes over it. This process cools down the air while transforming refrigerant within the coil from liquid to gas form. It’s a key part of making your living space comfortable.

3. What is the function of a condenser coil?

A condenser coil releases absorbed heat into outdoor air. As warm gas refrigerant moves through this coil, it turns back into a liquid form because its heat is expelled outside, making this component essential for an effective cooling cycle.

4. Can changing my aircon coils make my system more energy efficient?

Yes! Upgrading to newer, more advanced coils can improve your HVAC unit’s efficiency significantly. Modern technology allows these components to transfer heat more effectively, reducing energy consumption and saving on utility bills.

5. Why do some HVAC systems have fan coil units?

Fan coil units help distribute heated or cooled air throughout your home using minimal ductwork or even no ductwork at all. They’re especially useful in spaces where installing extensive ducts isn’t feasible or for enhancing temperature control in specific areas.

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