Air conditioning is essential for comfort during sweltering summer months, but some people report feeling unwell after spending time in cool, air-conditioned spaces. So, can air conditioning make you sick? The short answer is: not directly — but under certain conditions, it can contribute to health issues. Let’s explore how and what you can do to stay cool without getting sick.

Can Air Conditioning Make You Sick If It’s Not Maintained?

Yes. One of the most common causes of “air conditioning sickness” is poor maintenance. When an air conditioning system is dirty or has a clogged filter, it can circulate dust, mold spores, and bacteria throughout your home or office. These airborne irritants may lead to:

  • Respiratory problems

  • Headaches

  • Fatigue

  • Sinus congestion

Scheduling regular maintenance for your system is critical. We recommend checking out our air conditioning services for professional help in keeping your unit clean and efficient.

Can Air Conditioning Make You Sick by Drying Out the Air?

Absolutely. Air conditioners work by removing humidity from the air, which can lead to overly dry indoor environments. This dryness can cause:

  • Itchy eyes

  • Dry or flaky skin

  • Irritated nasal passages

  • Sore throat

Dry air also allows viruses to survive longer, increasing your chances of catching a cold or infection. To combat this, drink plenty of water and consider using a humidifier in overly dry rooms.

Can Air Conditioning Make You Sick If There’s Mold?

Yes, and this is a serious issue. Moisture can build up inside your A/C unit’s coils and ducts, especially if it’s not draining properly. Over time, this can become a breeding ground for mold and mildew, which can trigger:

  • Allergic reactions

  • Asthma attacks

  • Other respiratory illnesses like Legionnaires’ disease

If you suspect mold in your unit or vents, it’s important to act quickly. Our team can help – explore our cooling services to learn more about proper inspection and cleaning options.

Can Air Conditioning Make You Sick by Being Too Cold?

Yes, setting your thermostat too low can actually increase your risk of illness. Here’s why:

  • Cold air reduces blood flow, including the immune cells that fight viruses.

  • Low humidity dries out protective mucus membranes in your nose and throat.

  • Spending all day shivering in an ultra-cold office or home can lead to sore muscles, headaches, and fatigue.

Keep your A/C set to a comfortable room temperature — not an arctic blast. A difference of just a few degrees from the outside temperature is often enough to feel refreshed without stressing your body.

Stay Cool — and Stay Healthy

So, can air conditioning make you sick? It can, if it’s poorly maintained, too cold, or contributing to poor indoor air quality. But with a little care and regular upkeep, your A/C can be a source of comfort — not concern.

Need help maintaining your system or improving indoor air quality? Visit our Air Conditioning or Cooling Services pages to schedule a service with our experienced HVAC technicians.