Indoor air × the body
MoodAir links the carbon dioxide in a room to a person's heart rate variability, and tracks the two together, in real time.
MoodAir measures. It does not diagnose. It surfaces data and associations for a qualified professional to interpret.
The data gap
Indoor CO₂ crosses the level where cognition and decision making are affected in ordinary occupied rooms, every day. The body's stress signal responds. But no public dataset pairs the two for the same person at the same moment.
Several 2025 datasets now pair physiology with the indoor environment, which confirms the question matters. None include CO₂. Tap any dataset to see what it holds, and what it's missing.
*Inter-beat intervals are the raw signal HRV is derived from, not pre-computed HRV.
Live demo · real data shape
This is not a canned animation. Drag the playhead through a real indoor CO₂ day. The readouts and the degraded-air flag update as you move, exactly the way MoodAir reads a space.
The science
Sources: Satish et al. 2012 (cognition near 1000 ppm, small sample, directional); Harvard CogFx (Allen et al.); bedroom CO₂ thresholds and cortisol per sleep-research guidance. Effects shown are associations, not diagnoses.
How it works
A small CO₂ sensor logs the air continuously, with timestamps, plus temperature and humidity as context.
HRV comes from a wearable the participant already owns. No new device to issue. Sleep stage rides along too.
MoodAir lines them up on one timeline and shows whether a person's stress signal tracks their air, with the confounds controlled.
Who it's for, first
Your participants already wear HRV devices. MoodAir adds the air they were in, per person, time aligned, exportable as clean CSV you can defend to a reviewer.
See whether a patient's stress signal tracks their everyday air. It points to something you can change. The diagnosis stays entirely with you.
The evidence
Around 1000 ppm CO₂, cognition and decision making measurably decline, levels reached in ordinary meeting rooms.
Satish et al., Environmental Health Perspectives, 2012 (n=22; directional)Lower HRV is an established marker of stress and autonomic load, associated with anxiety, depression and cardiovascular risk.
HRV autonomic literature; we treat HRV as response, not diagnosisThe per-person link between CO₂ and HRV is not yet proven in everyday settings. That is exactly what MoodAir measures.
Coverage check across UCI, DigitalExposome, Shakir 2025, Baigutanova 2025Researchers who engaged with MoodAir
Pricing
B2B and subscription based. We scope each engagement with you, which also keeps MoodAir clear of consumer medical claims. Pick a path.
Tiers are proposed and being validated with researchers and clinicians. Willingness to pay is part of our customer discovery.
How we stay honest
Every view shows data and associations for a professional to interpret. No diagnostic claim, which keeps MoodAir clear of medical-device regulation.
A raw CO₂ to HRV correlation is noisy, so we capture context, temperature, noise, sleep stage, and vary only the air. Advised by Monash researchers.
Sold to professionals who manage consent and ethics. Data minimisation and clear handling terms. Ethics approval before any clinical pilot.
We do not pretend the link is proven. The missing dataset is the reason MoodAir exists, and the reason it collects rather than claims.
If you run studies or see patients, and you have always wondered what the air was doing, let us show you on your own data.
Get in touch