How do you know if your hvac is making you sick?

Breathing or breathing problems · 2.Many people find that, after a day of work, they tend to feel more tired than usual, some have headaches and others have a general feeling of tiredness. Those same people will also discover that, once they leave the building, the symptoms usually go away. Most likely, it's something in the building, such as air conditioning or Duct Cleaning near Tabor City NC. In a study published in August. Studies show that people who work in air-conditioned buildings have more respiratory problems (irritated nostrils, difficulty breathing) than people who work in buildings with natural ventilation.