Review on Supco IAQ50 CO2 Carbon Dioxide Meter Indoor Air Quality Monitor with Temperature, Humidity, Dew Point, and Wet Bulb - Desktop or Wall Mount by Steve Wynn

Very fast CO2 tracking. Excellent goods. Examples I've found: As soon as you walk into a room with a monitor, the levels start to increase with your own breathing. If you want to get unpolluted data on the basic ventilation of the room, you need to install the sensor in an unoccupied room and leave the room IMMEDIATELY, preferably closing the door behind you, wait a few minutes and then re-enter the room. and check the reading just before it starts to rise. I found my breath to raise my home office or bedroom by about 300 PPM after leaving the room empty for about 8 hours. This is due to the lack of a mechanical airflow fan to move the air around the house. For the best quality/healthy sleep, I highly recommend sleeping with the bedroom door open. If two people are sleeping in the same bedroom with the door closed, you've most likely exceeded an unhealthy 1100 PPM and may be suffering from lack of motivation, fatigue, and possible heart murmurs. Everyone should have one of these in the house. Everyone should also have an ERV (Energy Recovery Fan) to bring in fresh air from the outside. Google it.