Air
Ventilation, filtration, humidity, and monitoring for healthier, higher-performing homes.
Explore Air
Five systems, one guide
Each topic anchors into the flagship guide. Dedicated deep-dives come later — the guide covers the full stack today.
Source Control
Materials, combustion, radon — the pollutants a house never has to emit.
Ventilation
Fresh-air exchange in a tight house: balanced HRV/ERV systems and their tradeoffs.
Filtration
Central MERV filters and portable HEPA units — what each removes, and what neither can.
Humidity & Moisture
Holding roughly 30–50% RH without condensation, mold, or an over-dried winter house.
Monitoring & Testing
CO₂, PM2.5, radon, humidity — what each number answers, and what it doesn't.
Directory
Systems & components
The ventilation systems and purifiers cataloged so far — entries are added when they earn a place, not to fill a grid.
ComfoAir Q450
Zehnder
Whole-home balanced ventilation unit rated by Zehnder at up to 95% heat recovery, ducted to every room
ComfoAir 70
Zehnder
Through-wall single-room ventilation unit with continuous supply and extract through an enthalpy exchanger
HealthPro Plus
IQ Air
IQAir's flagship room purifier, with HyperHEPA filtration the company rates for ultrafine particles down to 0.003 microns
Atem X
IQ Air
Large-room air purifier with IQAir's HyperHEPA filtration in a slimmer in-room form factor
Purifier Cool
Dyson
HEPA air purifier with cooling fan and real-time air quality monitoring
Air Pro
Molekule
Room purifier pairing particle filtration with Molekule's PECO process, which the company claims breaks down pollutants rather than trapping them
Operate it
Air protocols
How to run the systems once they exist — measurement first, equipment second.
Overnight Bedroom Air
Ventilation, filtration, and CO2 in the room where you spend a third of your life — engineering the air you sleep in.
Indoor Humidity Control
Holding relative humidity in a band that avoids condensation, mold, and dust-mite growth without over-drying the house in winter.
In the wild
Documented builds
Homes in the directory where the air systems are documented room by room.
Ben Greenfield's Idaho House
A 10,000-square-foot biohacking house on family land. Copper under the floors, ethernet in every room, a $150K red-light chamber downstairs — designed as generational infrastructure, not a wellness flex.
Kayla Barnes-Lenz's Austin Longevity House
A full home 25 minutes outside Austin, designed around measurement and subtraction. Kayla Barnes-Lenz's residence documented room by room — lighting, air, water, sauna, bedroom, and the products that make it work.
Reading
Air on the site
The Compound Air Guide
The flagship resource — source control, ventilation, filtration, humidity, and monitoring, with the questions to put to your project team.
5 Invisible Ways Your Home Shapes Your Health
Five things your home is doing to your body and brain right now — and the inputs worth fixing first.