Are your allergies from the air quality in your home? Ventilation/Filtration Poor indoor air quality can be the cause of sneezing, coughing, congestion, asthma flare ups, etc. During the cold months, these compounds become trapped in our home, worsening the qual. of the air in our home. Fortunately, there’s many ways we can help improve this. Filtration is your first line of defense. airborne compounds are extremely small and may pass through traditional filters freely, so consider an air filter that is rated to deal with these smaller compounds.