The Importance of Indoor Air Quality
When we think of pollutants, we usually picture outdoor smog, industrial emissions, or vehicle exhaust. However, indoor air quality is just as critical to our health and well-being. Because most people spend over 90% of their lives indoors—breathing around 20,000 times a day—the air inside our homes directly impacts our daily comfort and long-term health.
According to the Environmental Protection Agency (EPA), indoor air can be two to five times more polluted than outdoor air. Over 900 potential pollutants exist indoors, placing millions of households at risk for respiratory or skin-related ailments.
Common Indoor Air Pollutants & Their Sources
- Combustion Byproducts: Carbon monoxide and nitrogen dioxide produced by improperly vented gas stoves, water heaters, fireplaces, wood stoves, and space heaters.
- Radon Gas: A odorless, naturally occurring radioactive gas that seeps into homes through foundation cracks. It is the second leading cause of lung cancer.
- Secondhand Smoke: Contains thousands of toxic chemicals that aggravate asthma, increase ear infection risks in children, and cause cardiovascular issues.
- Biological Contaminants: Mold, mildew, pollen, pet dander, and dust mites that thrive in stagnant or overly humid air.
Health Risks Associated with Poor Air Quality
| Health Risk Category | Associated Symptoms & Conditions |
| Immediate & Respiratory | Coughing, scratchy throat, nasal irritation, headaches, severe allergy flare-ups, and fatigue. |
| Chronic Health Conditions | Asthma complications, persistent respiratory illnesses, and skin irritation. |
| Severe & Long-Term Risks | Carbon monoxide poisoning, heart and lung complications, and increased risk of cancer. |
The EPA’s 3 Pillars for Cleaner Indoor Air
- Source Control: Eliminate or minimize individual sources of pollution (e.g., stopping indoor smoking, fixing gas leaks, and reducing chemical product usage).
- Proper Ventilation: Introduce fresh outdoor air through mechanical ventilation systems, air exchangers, or HRV/ERV units to dilute indoor contaminants.
- Air Filtration & Moisture Control: Utilize HEPA filtration systems to trap micro-particles while maintaining relative indoor humidity between 30% and 50% to stop mold growth.
Regularly cleaning your home and maintaining your HVAC system ensures a safe, healthy environment for your family. If you need expert air quality testing, whole-house filtration, or ventilation solutions in the Bay Area, schedule an assessment with Calvey Heating & Air today!
Joe Calvey
Joe Calvey is the CEO & Founder of Calvey Heating & Air, a leading HVAC business in San Jose, serving San Francisco and the Greater Bay Area for over 18 years.
Under Joe’s leadership, the team at Calvey Heating & Air specializes in HVAC repairs and maintenance, new system installations in custom homes, new construction, existing home upgrades, and light commercial HVAC work.