CO2 Monitors for Home
A home CO2 monitor sits on a desk or nightstand and shows when a room needs fresh air. It is especially useful in bedrooms and home offices with closed doors, where CO2 often climbs past 1,000 ppm within hours. Choose an NDIR sensor and a display you can read across the room.
What to compare
- NDIR sensor and calibration method.
- Display: large digits or color indicators you can see at a glance, with a dimmable or night mode for bedrooms.
- Alerts: a visual or audible alarm at your chosen threshold.
- Power: plug-in units can update more often. Battery units can be moved easily.
- Extra readings: humidity and temperature help with comfort.
- Placement: at breathing height, away from your face and from windows or vents.
Take readings on the go with Portable CO2 Monitors, or add PM2.5 with Smart Air Quality Monitors.
FAQs
Where should I put a CO2 monitor at home?
Place it in the room you want to check, at roughly breathing height, a few feet from where people sit or sleep, and away from windows, doors, vents and kitchens that would skew readings. In a bedroom, a nightstand or dresser across the room works well.
How do I lower CO2 in my bedroom?
Bring in more fresh air: open the bedroom door, crack a window, run a bathroom or kitchen exhaust fan, or use a mechanical ventilation system if your home has one. Air purifiers do not remove CO2. Fewer people or pets in the room also lowers buildup overnight.
Do air purifiers lower CO2?
No. Air purifiers filter particles and, with carbon, some odors and VOCs, but they do not remove carbon dioxide. Only ventilation, bringing in outdoor air, reduces CO2 levels. A CO2 monitor helps you see when to open a window even while a purifier is running.