Did you know that you spend 90% of your life indoors, and even more during the winter months? While most people assume outdoor air is more polluted, the truth is that indoor air can be 2–5 times more polluted, and in some homes, up to 100 times more contaminated than the air outside.

Poor indoor air quality affects your health, comfort, and energy efficiency. Here are the most important, eye‑opening statistics that highlight why maintaining clean ducts, filters, and HVAC systems is critical.

Key Indoor Air Quality Statistics

• The EPA ranks indoor air pollution as one of the top five environmental health risks in the U.S.
• The average home collects 40 pounds of dust every year, much of which circulates through your HVAC system.
• Up to 30% of heated and cooled air is lost through leaky ductwork, worsening indoor air quality and increasing energy costs.
• Children breathe 50% more air per pound of body weight than adults, making them more vulnerable to indoor pollutants.
• Indoor air can contain over 900 different compounds, including dust mites, pet dander, pollen, mold spores, bacteria, VOCs, and combustion byproducts.
• Dirty HVAC systems can reduce system efficiency by 15–30%, increasing utility bills and straining components.
• Poor indoor air quality contributes to 50% of all respiratory illnesses, including asthma and allergies.
• Homes with pets typically see a 2–3x increase in airborne particles and allergens.
• Studies show Americans spend up to 70% of winter months inside their homes, leading to higher exposure to contaminants trapped in ductwork.
• After renovation or construction, particulate levels can be 10–15 times higher for months if ducts are not cleaned.

Why Indoor Air Quality Gets Worse in Winter

During colder months, windows stay closed, ventilation decreases, and your heating system runs continuously. This recirculates dust, debris, allergens, and pollutants trapped inside your ducts and HVAC components.

The result: higher exposure, more respiratory irritation, more odors, and greater strain on your heating system.

How Advanced Air Duct Cleaning Helps Protect Your Health

Professional duct cleaning can improve indoor air quality by removing:

• Dust, dander, and pet hair
• Mold spores and microbial growth
• Construction debris and contaminants
• Odors trapped in ductwork
• Blockages affecting airflow and efficiency

Clean ducts, clean coils, and a clean blower motor all work together to keep your home healthier, more efficient, and safer year‑round.

Breathe Cleaner, Healthier Air

Advanced Air Duct Cleaning is committed to improving your home’s air quality with NADCA‑certified cleaning, state‑of‑the‑art equipment, and over 60 years of trusted expertise. Cleaner ducts mean cleaner air, and a healthier home for your family, contact us today!