What is Indoor Air Quality?
Indoor air quality refers to the cleanliness and health of the air inside your home — affected by dust, allergens, humidity, and ventilation. Poor indoor air quality can worsen allergies and respiratory issues, while proper filtration and ventilation help improve it.

What is indoor air quality?
Indoor air quality (IAQ) refers to how clean and healthy the air inside your home is, based on the presence of dust, allergens, humidity, and how well the space is ventilated. Poor indoor air quality can worsen allergies, trigger respiratory issues, and contribute to musty odors or excess humidity, while proper filtration and airflow help keep it in check.
What affects indoor air quality
Several everyday factors combine to determine IAQ: dust and pet dander that build up between filter changes, humidity levels that encourage mold or feel uncomfortably dry, and how much fresh air actually circulates through a home versus staying stagnant. An HVAC system plays a central role since it's constantly moving — and filtering — the air you breathe.
Signs your indoor air quality needs attention
- Persistent dust buildup on surfaces shortly after cleaning
- Worsening allergy or respiratory symptoms while at home
- Musty or stale odors, especially in humid months
- Noticeably dry or overly humid air indoors
If you're noticing any of these signs, our technicians can assess your home's airflow and filtration and recommend next steps — call LJ Refrigeration Co. at (480) 948-5004.