Case Study 05 · Work From Home
Home Office — CO₂, Cognitive Performance & the 3pm Crash
For WFH professionals, sealed home offices with running ACs produce some of the worst indoor CO₂ conditions in a home — one person, one room, windows closed, CO₂ reaching 1500–2500ppm by afternoon. This documents exactly what changes with continuous fresh air ventilation.
2,400
ppm peak CO₂ — sealed home office 4 hrs
50%
Lower cognitive scores at about 1400ppm CO₂ (Harvard)
<700
ppm with InAir — all day, every room
CO₂ vs Cognitive Performance — The Science
| CO₂ Level | Condition | Cognitive Impact |
|---|---|---|
| 400–600 ppm | Outdoor fresh air standard | Baseline — optimal performance |
| 700–1000 ppm | Good ventilation (ASHRAE target) | About 15% lower cognitive scores at around 945 ppm than at 550 (Harvard, 2016) |
| 1000–1500 ppm | Poorly ventilated AC room (2–3 hrs) | About 50% lower at around 1,400 ppm (Harvard, 2016) |
| 1500–2500 ppm | Sealed home office, 4–6 hrs | Decision-making scores far lower by 2,500 ppm (Satish et al., 2012) |
| 2500+ ppm | Sealed conference room / bedroom | Above the range these studies tested |
A WFH professional earning ₹1.5 lakh/month working 8 hrs/day: if CO₂ reduces productivity by 20% for 4 hours each afternoon, that’s effectively ₹30,000/month in lost output. InAir for a 2BHK costs less than 1 month of that productivity loss.
<800ppm
CO₂ maintained all day with InAir
0 dB
Perceived noise — designed to disappear
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