
@levelsio Mechanically open up the window for short bursts when the sensor hits a threshold?
English
Keith Mander
3 posts



For a 50 m² apartment (roughly 125 m³ volume) with two sleeping adults, zero plants will keep CO2 under 900 ppm overnight. Humans produce ~20 L CO2/hour total while sleeping. Over 8 hours that's a ~1,000+ ppm rise without ventilation. At night plants respire too—they release CO2, no photosynthesis. Even daytime, studies show you'd need 300-700+ houseplants per person (thousands here) for any real offset. It's not practical. Open a window or ventilate instead.

