Why the Air We Breathe at Home Is One of the Biggest Hidden Health Risks

Nov 7

We spend roughly 90% of our time indoors, yet most of us rarely question the quality of the air in our homes. In Episode 25 of Finding Frequency, Simon Jones, consultant and host of Air Quality Matters, explains why indoor air is one of the most important (and overlooked) drivers of our health, performance, and recovery.

“We’ve assumed our spaces are going to look after us, and we probably need more agency in them than we think we do.”

— Simon Jones

1. The Invisible Threat in Our Living Rooms

Airtight construction for energy efficiency, off-gassing from materials, cooking, cleaning products, and unbalanced ventilation can trap pollutants indoors. Recent research underscores that indoor sources are frequently unregulated and can accumulate in modern homes.

2. What the Evidence Says

Ventilation upgrades work. A 2017 randomized trial found that applying the newer ASHRAE 62.2–2010 standard (versus the older 62-1989) resulted in nearly double airflow rates, significantly reduced formaldehyde and VOCs, and improved self-reported health (fewer headaches, eczema, skin allergies).
According to a review on ventilation rates and health in homes, among 20 studies with ~175 statistical tests, 24 showed health improvements linked to increased ventilation rates, far more than expected by chance.
A 2022 study found that mechanical ventilation systems in homes significantly reduced particulate matter (PM2.5), CO2, carbon monoxide, and formaldehyde, especially in lower-income households.
IAQ isn’t just about asthma; there are mental health and cognitive links as well.

3. Design & Behavior Levers You Can Use Now

For designers/developers:

Prioritize balanced mechanical ventilation (HRV/ERV) early in design.
Specify low-VOC materials, finishes, and furnishings.
Plan for filter access and maintenance; target MERV-13 or better when possible.

For households:

Use your range hood every time you cook; if gas, consider induction for source reduction.
Change filters on schedule; vacuum with HEPA; keep humidity ~40–60%.
Monitor indoor CO₂/PM2.5 as practical “proxies” for ventilation and particle load.

“Your living room might be a more critical health zone than your commute.”

4. Equity & What Matters Most

Lower-income households often face older systems, limited upgrades, and higher exposure. Studies show ventilation interventions can yield outsized benefits for these homes. Designers, policymakers, and manufacturers should align health and access with performance and cost.

5. Listen to the Episode

In our conversation, Simon shares: