It’s a question that seems to obtain asked every year, specifically during summer and winter season when folks utilize their heating and cooling and heating unit the most often.
And the debate over whether air-conditioned or “fresh” air from outdoors is better for you has raged given that heating and cooling initially became prevalent in the years after World War II.
Claims that heating and cooling is bad for you have the tendency to focus on the potential for breathing problems because the system recirculates the air in the building. When an air conditioner’s filter is kept properly maintained and clean, the air it puts out in fact is better for many people, especially those with allergies and asthma, as it filters out pollen, dust, and other contaminants.
Studies comparing homes with an air conditioner and those without one indicate that no increase in sickness has happened in homes with A/C.
Keeping them well maintained is key.
When air conditioning unit are not cleaned thoroughly and filters switched out a few times a year, a breeding place for all kinds of bacteria and fungus is produced. Then you breath in this gunk when the unit blows out cold air.
The other way to make sure that you maintain your health when running the air conditioner is to take periodic breaks outside to get some fresh air.