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My AC is Running But My Home Feels Humid — What’s Wrong?

As you may already know, a functioning AC provides some dehumidification as it cools. When this process is no longer working as well as it should, then you may experience high levels of humidity in your home, in addition to any other issues such as inadequate cooling or hot spots. This can lead to stuffy and uncomfortable air throughout your home. Call Premier Indoor Comfort Systems today if you’re concerned about the high levels of humidity in your home. We can arrive promptly at your home and assess what might be wrong with your air conditioning system.

Isn’t My Air Conditioner Enough to Control Indoor Humidity?

The principle job of a home air conditioning system is to absorb heat from the indoor air and transport it outside, lowering the temperature of the indoor air in the process. As the air conditioner draws thermal energy to its evaporator coil, it also draws moisture from the air. The moisture condenses along the coil and then drips down into a pan, where a pump removes it through a drain.

So it is true that air conditioners have some dehumidifying properties that will make the air in a home a bit dryer. But, unless an air conditioner is specifically equipped with special humidity controls, it is not an efficient dehumidifier for a home—especially in place that can grow as humid during the summer as the south.

Why is My House So Humid with the AC On?

Let’s take a look at some reasons why your home might be excessively humid:

  • Frozen evaporator coils: When you have frost on your coils, it means that they are not able to perform their function. The evaporator accepts cold, liquid refrigerant from the outdoor unit and uses this is to cool the warm air that has been extracted from your home, and then return that cooled air to you. But your coils can’t cool the air if they are covered in frost. Your coils, therefore, will not dehumidify the air as much as they should, making your home seem muggy.
  • Dirt, dust, and other debris: As with any mechanical system, your AC needs to be kept clean at all times, but this is not always so straightforward. While there is an air filter near your air handler that minimizes the amount of dust, dirt, and debris that can accumulate on sensitive components, over time, your system will nevertheless need to be professionally cleaned. In particular, your outdoor condenser coils are subject to environmental conditions, and if they are in any way impaired by dirt or other materials, it makes it difficult for them to dissipate heat into the outdoor air. This disrupts the refrigerant cycle and can lead to higher temperatures and a lack of dehumidification.

How Can I Best Dehumidify My Home?

If the air conditioner can’t handle the job of balancing out humidity, what can you do to achieve more comfortable and healthier humidity levels in your home? The answer is to install a whole-house dehumidifier. These are devices that a professional indoor air quality specialist can integrate in your HVAC system.

Whole-house dehumidifiers use a similar action to air conditioners to remove moisture from the air. A refrigerant-cooled coil draws water vapor from the air, where it collects and is then removed through a drain. However, the dehumidifier then slightly reheats the air around it so that it will not interfere with the air conditioner and resulting air that is colder than it should be.

It is important for professionals to locate the right size and power of dehumidifier for a home. One that is too powerful will dry out the air in a home, and this is as much a problem as air that is overly humid. With properly balanced humidity thanks a skilled installation, you’ll enjoy a more pleasant home environment and require less work from your AC to maintain comfort.

Call Premier Indoor Comfort Systems today at (770) 749-7667 for all of your air conditioning needs. We serve the greater Atlanta area and beyond from our offices in Canton, GA and Whittier, NC.

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