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I have a 10 x 15 portable building I use for an office. It has a mini split AC system which does not bring in fresh air. After spend all day working in there the CO2 builds up. Using this device helps me see the buildup. As a result I got a window fan with a thermostat and set it so the level stays moderate. I also discovered my bedroom buildup at night is much worse when I close the door. I also used it to check for CO2 buildup around a gas water heater, to make sure the vent was working. Lot of uses around the house. Generally CO2 should stay below 1000 PPM (outdoors is generally 300-400 PPM) although government standards go as high as 10000 PPM. I took off one star because the temperature displays only in Celsius which is not very useful in the U.S.
Verified purchase: Yes | Condition: New
It is simple to get started up, but co2 value is +-50 and has quite a lag, rechargeable battery it comes with is weak. Haven’t seen if it’s replaceable with a common style. But for less than 100$ I’m surprised it works fairly well. Delivery took extra few days probably due to pandemic
Verified purchase: Yes | Condition: New
Great affordable CO2 monitor. It seems pretty accurate/sensitive enough for personal use. My only gripe is that the battery lasts about a day so far, when I leave it on.
Verified purchase: Yes | Condition: New
Is solid, straightforward. CO2 reads around 400ppm in my garage - zero calibration looks correct. I have yet to compare accuracy with work sensors, but already have insights (how much does it rise with a medium propane gas stove burner running (rose from say 720 to over 1400 in my home environment OA infiltration/occupancy). Temperature (Celsius only) seems accurate, humidity I don't doubt but haven't checked. Lasted about 12h on battery with the backlight off. There are no calibration adjustments available.
Verified purchase: Yes | Condition: New
Working great
Verified purchase: Yes | Condition: New
