All the Hacks · Wednesday, September 2, 2026
Dom Franks detailed four main air quality factors to consider in bedrooms for sleep quality: particulate matter (PM), ventilation (measured by CO2), humidity (aiming for 35-55% and below 50% for mold prevention), and chemical presence (VOCs). He stressed that high PM levels can disrupt sleep.
“So we're looking at four main things in the air quality in any room, but we're focusing on the bedroom here.”
“So first is particulate matter. There've been a lot of wildfires recently and so this is any particular that's in the air.”
“We're also looking at ventilation, which CO2 is the best proxy for ventilation.”
“We're also looking at humidity. We're focused on humidity is both there's a range between 35 and 55% that most people find most comfortable.”
“And then finally, we're looking at chemical presence. And so that's volatile organic compounds or VOCs and other compounds that can come from paint, furniture, other sources in the house.”