2. Properties need to breath as do heating and ventilation systems. Next in the lowest level of the house we look for any signs of moisture especially around any bulkheads and base of foundation walls. If there are any odors, dampness, mustiness, then one should check for mold.
3. Once one is comfortable with the level of air exchange, then the next thing to do is close up the house and come back in 24 hours to start a radon and or air quality test(s).
4. Air ducts are prone to trapping not only dust and dirt, but spores and other bacteria as well. So ducts should be professionally cleaned every couple of years. One way to know that they are becoming dirty is the air filters getting excessively dirty quickly. Under normal conditions, HVAC systems air filters should be replaced every 90 days.
5. Pet dander and hair are another source of fresh air contamination. Not all pets shed, but if there are several pets in a home and they are the type that shed, their dander can easily get into carpeting, cloth furniture, bedding and the ventilation system. So if you come across a property with these issues, know that it will take deep cleaning to eradicate.
I hope these tips will help you in your real estate search, as always feel free to ask me any questions and I’ll reply in a timely manner.
Have a Happy New Year!