Reading a CO2 valueCO2 value (ppm)Number of people (optional)Result1,000 ppm is between 900 and 1,200 ppm: extra ventilation makes sense.Source: SW-S18 Nieuwe regels voor de kwaliteit van de binnenlucht in werklokalen; SW-S19 Normen en regelgeving over de luchtkwaliteit binnenshuisMore explanation: What CO2 level is good at home?Calculator with general information, not advice or an inspection. Check the source and reference date.