How Does Humidity Affect Your AC System?

September 1, 2023

Leaky,Air,Conditioner,At,Home,On,WallAs summer arrives, our reliance on air conditioning systems increases to keep us cool and comfortable. While we often associate air conditioning solely with temperature control, another crucial factor at play is humidity. High humidity levels can impact the performance and efficiency of your AC system, affecting both your comfort and energy bills. In this blog post, we will explore how humidity affects your AC system and the steps you can take to mitigate its impact.

1. Understanding Relative Humidity:

Before delving into the effects of humidity on your AC system, it is important to understand relative humidity. Relative humidity is the measure of moisture present in the air compared to the maximum amount it can hold at a certain temperature. When humidity is high, the air feels muggy and damp, adding to our discomfort. AC systems are designed to remove excess moisture from the air, maintaining optimal levels for our comfort and health.

2. Reduced Cooling Capacity:

High humidity levels can decrease the cooling capacity of your AC system. When the air is already saturated with moisture, it becomes more challenging for the AC unit to extract humidity and cool the air effectively. This results in reduced cooling efficiency and longer operating times for the AC system, as it works harder to achieve the desired temperature. As a result, you may experience slower cooling, less efficient operation, and higher energy bills.

3. Increased Energy Consumption:

The increased workload caused by elevated humidity levels can lead to a significant increase in energy consumption. When your AC system runs longer to compensate for high humidity, it consumes more electricity, impacting your monthly energy costs. Additionally, the strain on the AC unit may shorten its lifespan, leading to costly repairs or premature replacement. Taking steps to address humidity can help optimize your AC system’s efficiency and improve energy conservation.

4. Elevated Discomfort Levels:

One of the primary functions of air conditioning is to control both temperature and humidity for indoor comfort. Excessive humidity can make you feel hotter and stickier, even when the air temperature is adequately regulated. When the air is too humid, sweat does not evaporate as efficiently from your skin, impairing your body’s natural cooling mechanism. As a result, you may find it challenging to achieve a comfortable environment, undermining the effectiveness of your AC system.

5. Potential Mold and Mildew Growth:

High humidity provides the ideal breeding ground for mold and mildew, posing potential health risks and damage to your AC system. These moisture-loving organisms can proliferate in various parts of your AC unit, including condensate lines, coils, and ductwork. Mold and mildew growth not only affects the performance and efficiency of your system but also leads to unpleasant odors and air quality issues. Regular maintenance and humidity control can help mitigate the risk of mold and mildew, ensuring a healthy and efficient AC system.

6. Importance of Dehumidification:

To combat the adverse effects of humidity on your AC system, dehumidification is crucial. Dehumidifiers work in conjunction with your AC system to remove excess moisture from the air, optimizing comfort and energy efficiency. Some modern AC units come with built-in dehumidification features, but standalone dehumidifiers can also be used to supplement the process. By controlling humidity levels, you not only improve the performance of your AC system but also enhance overall indoor air quality.


Humidity plays a significant role in the performance and efficiency of your AC system. Excessive moisture in the air can reduce the cooling capacity, increase energy consumption, diminish comfort levels, and promote mold growth. By understanding the impact of humidity and taking necessary measures such as dehumidification, you can ensure your AC system operates optimally, keeping you cool, comfortable, and energy-efficient throughout the summer months.

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Welcome to JMB A/C & Heating LLC! We are proud to provide air conditioning services and heating repairs to all of our clients! We specialize in installing air conditioning units and providing air conditioning maintenance! We offer services to both residential and commercial clients. We at JMB A/C & Heating LLC strive to provide exceptional customer service and professionalism. We also offer cleaning specials on occasion. Give us a try to find your favorite air conditioning repair guy! If you want to freeze, call JMB A/C & Heating LLC! Call us today to ask about our cleaning specials!

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