Why Does Air Conditioning Make You Sleepy?

Understanding why air conditioning makes you sleepy involves various physiological factors. These range from the cooler temperatures’ impact on your body’s circadian rhythm to the changes in air quality that come with an AC system.

By understanding these factors, you can optimize your AC usage for maximum comfort and health benefits.

Does AC Make You Tired?

There is scientific evidence that suggests the use of air conditioning can make you feel tired. When the body is cold, it tends to conserve energy, which could make you feel sluggish or tired. Additionally, AC units often lower the humidity level, which can cause dehydration. Dehydration often results in feelings of fatigue and exhaustion.

Does Air Conditioning Make You Sick?

Air conditioning itself does not necessarily cause sickness, but poorly maintained systems can. AC units that aren’t regularly cleaned can circulate dust, allergens, and bacteria, leading to potential health problems such as respiratory issues, allergic reactions, or AC sickness.

5 Ways Air Conditioning Affects Your Body

  1. Temperature Regulation: Air conditioning can disrupt your body’s natural temperature regulation, leading to feelings of fatigue.
  2. Dehydration: As AC units lower humidity levels, they can inadvertently cause dehydration, which could make you feel tired.
  3. Air Quality: Poorly maintained AC systems can circulate pollutants and allergens that can affect your respiratory health.
  4. Sleep Cycle: Cooler temperatures can affect your sleep cycle, potentially causing irregular sleep patterns.
  5. Skin Dryness: Lower humidity levels can dry out your skin and mucous membranes, leading to discomfort and potential health problems.

Air Conditioning Sickness Symptoms

Air conditioning sickness, also known as Sick Building Syndrome, has various symptoms including dryness and irritation of the eyes, nose, throat, and skin, headache, fatigue, shortness of breath, hypersensitivity and allergies, sinus congestion, coughing and sneezing, dizziness, and nausea.

How to Deal With Air Conditioning Tiredness

To combat AC induced tiredness, ensure to stay hydrated by drinking enough water throughout the day. Also, consider using a humidifier to maintain proper indoor humidity levels. Regular maintenance of your AC system can help prevent the circulation of pollutants and allergens.

How Long Should You Keep the Air Conditioning On Per Day?

The duration you keep your AC on depends on your comfort and the weather. However, for energy efficiency and to avoid potential health issues, it’s recommended to turn off your AC when you leave the house for extended periods or adjust the thermostat to a slightly higher temperature.

Is it Bad to Sleep With AC On While You Have a Cold?

Sleeping with the AC on while having a cold can potentially dry out your nasal passages and throat, making your symptoms worse. It’s advisable to adjust the temperature to a comfortable level and use a humidifier if necessary.

Is AC Bad for Your Health?

Air conditioning itself isn’t bad for your health, but its misuse can lead to health issues. Ensuring regular maintenance, proper temperature, and humidity settings can help maintain a healthy indoor environment.


Air conditioning can greatly enhance our comfort, especially during hot summer months. However, it’s crucial to understand how it can affect your body, leading to feelings of tiredness or even sickness if not used correctly.

Remember to keep yourself hydrated, maintain a comfortable temperature, and ensure regular AC maintenance for a healthy indoor environment. Understanding these factors will help you use air conditioning responsibly, ensuring a balance between comfort and health.

About Roy Cohen

Roy Cohen has a burning passion for heating, cooling, and ventilation. He aims to help you save money on expensive repairs and bring you the best HVAC products. He has years of experience behind him in HVAC repair and garage maintenance.

You can find Roy at his LinkedIn or his email: [email protected]

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