How HVAC System Coil Maintenance Can Keep Your System Running Smoothly

Your HVAC system is responsible for moving air through your home and maintaining a comfortable interior temperature. It must be maintained to ensure it does not spread dirt and debris. It must also be checked for clogs that can reduce energy efficiency. 

Coil cleaning is a critical focus of HVAC system maintenance. Air Duct Charleston offers complete HVAC system maintenance including coil cleaning. Contact us to learn more about our comprehensive services. 

What is an HVAC Coil Anyway?

Coil Cleaning - Before - After
Air Duct Charleston - Coil Cleaning (Before:left, After:right)

Coils are the most important parts of your HVAC system. They are responsible for its heat exchange. They ensure your system heats and cools your home efficiently.

An HVAC system contains two sets of coils as follows:

  1. One indoor coil that acts as an evaporator
  2. One outdoor coil that acts as a condenser


The evaporator coil is located inside your ductwork. If your AC is on, it will pull heat from the existing air to cool it. If your heater is on, it will add heat to the air. Refrigerant moves through the coil to provide the desired effects.

The condenser coil regulates the refrigerant temperature. The refrigerant circulates through the condenser coils and changes the temperature before it is sent back to the evaporator coil. Since the coil is in your outdoor unit, the heat energy transferred to the refrigerant is released into the outdoor air.

Why Do HVAC System Coils Require Maintenance?

A Poorly Maintained System Can Negatively Affect Health: If your HVAC system isn’t cleaned regularly, it can lead to a buildup of mold spores, bacteria, and other particulates that affect air quality. If these contaminants get into the air, they can affect the occupants’ health. They can irritate the respiratory system, aggravate allergies, and cause severe health conditions.

It Can Reduce Air Flow Efficiency: The buildup can also prevent efficient airflow. It makes the system work harder to produce less air. Your energy bills will go up and your home environment won’t be as comfortable.

It Could Damage Your System: Debris on the coils can trap moisture that leads to leaks and corrosion. It can cause the system to fail. It also makes the system work harder to produce air increasing the risk of it overheating.

How Often Should I Get My HVAC Coils Cleaned?

HVAC coils should be cleaned once a year. Clean your cooling coils just before summer and your heating coils before winter to ensure they run efficiently throughout the season.

What is Involved in the Coil Cleaning Process?

Outdoor coil: The contractor will start by clearing away surface debris by hand or with a specially designed brush. They will follow up by applying a commercial cleaner and rinsing the coil with water. The process may vary depending on the cleaner they use.


Indoor Coil: An indoor coil uses a similar process. However, because the coil is more sensitive, the contractor may use a mild detergent rather than a commercial cleaner.

Can I Clean the HVAC Coils Myself?

Yes, you can clean HVAC coils yourself. You can use compressed air to clear away dirt and debris. Stubborn buildup may require a combination of dishwashing spray, warm distilled water, and vinegar. If you are dealing with a buildup of mold, mildew, or algae, you may require something stronger. 

A DIY cleaning is a good way to keep your system clean between maintenance visits, but it should never substitute for a professional cleaning. If you forego professional cleanings, you may not get your system truly clean. You may run into issues with air quality, high energy bills, and system failure. 

DIYing an HVAC coil cleaning also presents a risk of injury. You may inhale fumes, hurt yourself, or damage your system. If you don’t feel comfortable cleaning your coils yourself, call a professional first.

The Benefits of a Professional HVAC Coil Cleaning

  1. Low Energy Bills: HVAC coil cleaning ensures your system runs efficiently minimizing high energy bills

  2. Keeps Your System Running Longer: Regular maintenance will keep your system running longer so you spend less money on repairs and replacements

  3. More Pleasant Home Environment: A system that runs efficiently will cool or heat your home quickly and ensure a pleasant home environment

  4. No Risk of Damage or Injury: A professional HVAC coil cleaning eliminates DIY methods that can damage your system and increase injury risk

  5. Ensures your System is Clean: A professional cleaner will ensure your system is truly clean so you don’t have to worry about unclean air or dirt and debris that can cause clogs and damage

What to Look for in an HVAC Coil Cleaning Service

  1. Years in business: Look for a company with years of experience serving its community
  2. Environmental products: The contractor should use environmental products that won’t contaminate the air 
  3. Free Estimate: Free estimates ensure you won’t pay for services you don’t need
  4. Positive Customer Reviews: Look online to find out what other people are saying about the company
  5. Emergency Service: Companies that offer emergency service can be available 24/7 if something goes wrong with your HVAC system
  6. Warranties and Guarantees: The company should back its products and services with warranties and guarantees
  7. Reasonable Prices: Get a few estimates to determine which contractors offer the best rates

Choose AirDuct Charleston as Your HVAC Coil Cleaning Specialist

HVAC coil cleaning is a necessary part of HVAC system maintenance. AirDuct Charleston is a trusted coil cleaning provider.

AirDuct Charleston has years of experience serving our community. We use environmental products that are kind to the environment. Our efficient processes ensure your system will be thoroughly clean.

Our core values include professionalism, integrity, excellence, precision, and productivity. We are backed by excellent customer reviews. We guarantee you will be happy with our work.

Contact us for a free estimate and learn more about our affordable services.

Contact Us


Here at Air Duct Charleston, we’re always ready to assist you for your Air Duct and Dryer Vent Cleaning Service in Charleston, SC. We can help you with any Air Duct and Dryer Vent Cleaning Service, please call us at (843) 608-8042 or get a Free Online FREE Estimate