When Does Humidity Cross the Comfort Threshold?

Humidity plays a crucial factor in determining the comfort level of an individual. High humidity can make it difficult for the body to effectively regulate its temperature, leading to discomfort and potentially harmful effects on one’s health. In this article, we will explore various factors that contribute to comfort levels and when humidity levels cross the comfort threshold.

Factors that determine comfort levels:

  • Temperature: The temperature of the room affects how the humidity feels. Higher temperatures increase the feeling of humidity.
  • Airflow: Airflow determines how quickly or slowly moisture evaporates from the skin, impacting how comfortable an individual feels.
  • Clothing: Clothing can contribute to how much moisture is on the skin, affecting perception of humidity levels.
  • Activity level: Physical activities can increase body temperature, making the humidity feel more intense.
  • Individual preferences: People have varying thresholds for comfort when it comes to humidity levels.

Measurement of humidity

Humidity is measured using a device called a hygrometer, which is commonly found in a thermostat or humidifier. The measurement is given as a percentage of the amount of water vapor present in the air compared to the total amount of moisture the air can hold at that temperature. The maximum amount of moisture that air can hold increases with temperature, so it is important to account for temperature when measuring humidity.

The ideal relative humidity for human comfort is between 40-60%. Humidity levels that fall below this range can cause dry skin, irritated eyes, and respiratory problems, while humidity levels higher than 60% can lead to mold growth, dust mites, and increased moisture levels.

Effects of High Humidity

High humidity levels can negatively impact an individual’s health and wellbeing in several ways.


Excess moisture in the air can make it difficult for sweat to evaporate, causing discomfort and a feeling of stickiness. High humidity levels can exacerbate symptoms such as fatigue, difficulty breathing, and sweating, all of which contribute to discomfort and a decreased ability to perform activities of daily living.

Respiratory Issues

High humidity levels can lead to an increased risk of respiratory problems, including increased asthma symptoms, bronchitis, and other respiratory infections. Asthmatic patients may experience symptoms such as shortness of breath and wheezing due to the humid air. Humidity can also cause inflammation in the respiratory tract, making it more difficult for the body to fight off infections.


Humidity can increase the risk of dehydration as the body is unable to cool down effectively. This is due to the fact that sweat cannot evaporate effectively in humid air, leading to an increased risk of heat exhaustion or heat stroke.

When Does Humidity Cross the Comfort Threshold?

As previously mentioned, individual preferences and factors such as activity level, clothing, and airflow all play a significant role in determining comfort levels. However, a general guideline for when humidity crosses the comfort threshold can be determined by examining the dew point.

The dew point is the temperature at which air becomes saturated and condensation forms on surfaces. It is an important factor to consider when assessing comfort levels since it is the temperature at which moisture in the air is most prevalent.

A dew point of 60°F is considered comfortable, with levels above 65°F indicating increased discomfort. Dew point levels between 70-75°F are considered intolerable, with levels exceeding 75°F indicating dangerous and potentially life-threatening conditions.

Utilizing this guideline, it suggests that indoor humidity levels in homes and workplaces should be maintained between 40-60% to ensure individual comfort and wellbeing.

How to Manage Humidity Levels

The key to managing humidity levels and ensuring comfort is proper ventilation and air circulation. Below are some tips to help you manage indoor humidity levels:

  • Utilize exhaust fans in bathrooms and stovetop ranges to remove moisture from the air
  • Ensure proper air circulation with the use of fans and open windows
  • Maintain temperature levels between 68-72°F to ensure comfort
  • Use a dehumidifier to remove excess moisture, especially in rooms such as basements and laundry rooms
  • Ensure that HVAC systems are properly maintained and filters are regularly changed
  • Check for and repair any leaks or water damage that may be contributing to increased moisture levels

The Importance of Monitoring Humidity Levels

Regular monitoring of humidity levels is crucial to maintaining comfort and ensuring a safe indoor environment. It is recommended to check humidity levels regularly, especially during seasons with high moisture levels such as summer and winter. Utilizing a hygrometer can help ensure that indoor humidity falls within the recommended range and can help prevent any potential negative effects of high humidity levels.

Risks of Prolonged Exposure to High Humidity Levels

Prolonged exposure to high humidity levels can result in a variety of negative health consequences, including:

  • Skin irritation and rashes
  • Mold growth
  • Increased risk of respiratory illness
  • Insect infestation
  • Damage to furniture, electronics, and documents

High humidity levels can also impact individuals with pre-existing health conditions, such as asthma and allergies. It is crucial to maintain proper indoor humidity levels to ensure that individuals are not put in unnecessary danger.


Humidity levels play an important role in determining individual comfort and health, with levels above the recommended range leading to increased risks of negative health effects. Utilizing a hygrometer, maintaining proper ventilation and air circulation, and regularly monitoring for leaks and water damage can help ensure that indoor humidity remains within the recommended range. Proper management of humidity levels can help individuals avoid discomfort and potentially dangerous health consequences associated with prolonged exposure to high humidity.

Most Common Questions and Answers

  • Q: What is a comfortable humidity level?
  • A: The ideal relative humidity for human comfort is between 40-60%.
  • Q: What is the dew point?
  • A: The dew point is the temperature at which air becomes saturated and condensation forms on surfaces.
  • Q: What are some health risks associated with high levels of humidity?
  • A: Health risks associated with high levels of humidity include skin irritation and rashes, mold growth, increased risk of respiratory illness, insect infestation, and damage to furniture, electronics, and documents.


  • American Society of Heating, Refrigerating and Air-Conditioning Engineers (2013). ASHRAE Handbook – Fundamentals. Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers.
  • Wiley, J. (2010). Indoor Air Quality Guide: Best Practices for Design, Construction, and Commissioning. Hoboken, NJ: John Wiley & Sons.
  • National Institutes of Health. (2019, February 12). Indoor Air Pollution and Health. Retrieved from https://www.ncbi.nlm.nih.gov/books/NBK126168/

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