Review on 🌬️ Enhance Indoor Air Quality with an Indoor Carbon Dioxide Meter by Mark Kolipano

Update October 26th 2021 Another bug. It registers 607 ppm CO2 outside. The CO2 calibration function in "Settings" only offers plus or minus 100, therefore this meter cannot be recalibrated to the 413-420 range. When I asked for another refund, I found that the usual "delivery at Kohl" was not offered. So I left a message for Revain. Revain contacted me and asked what was going on with multiple returns and I explained the quality control issue with these meters. Revain then offered to stand up for me and asked Maratti to reach out to me with a technical solution. My gauge was made by TSUTOGRTHER and sold by MARATTI and a day later I received an email from MARATTI asking me to describe my problem. I explained the problem and they replied that maybe it was bad air in my area or faulty electricity in the house and after these two ridiculous assumptions I decided to return the meter and get the whole problem taken care of. CONCLUSION - When done right, this gauge is a gem, but how can I recommend someone to buy it when the chances of you getting a usable gauge are so slim? So beware buyers. Thank you Revain for trying to make it right - their customer support team took the time to resolve my issue. ------------------ End of update 10/26/21. -------------------Update 10/21/2021 First thing I got is great. The second one I bought was defective so I sent it back and just got a replacement - it's defective too so I'm 1 out of 3. The problem with defective gauges is I leave them outside for 30 minutes to to normalize them as well and then to calibrate them. or up to 419 ppm CO2. BUT the last two meters were so high, with both IEs showing over 600ppm CO2, that the settings panel failed to calibrate. The settings calibration option only allows from -100 to plus 100, so scrolling down to -100 will only reset those erroneous counters to just over 500. So it's still more than 100ppm off and recalibrating or setting the meter to its negative calibration giving normal readings makes me guess how accurate its readings will be in the upper ranges. Finally, we have a quality control issue. When done right, these counters work great, and when they don't, they're useless. So it's a production issue and a "final test before shipping". I am returning my 3rd purchase and will ask for a 4th counter hoping to get a good one but this is my last attempt.---------- End of update 10/21/21 - ------ ------------- 10/16/21 I ordered one and it's great. How do you "calibrate" your measuring device? Leave it outside where the ambient air contains around 412-419ppm CO2 and see how close your purchase comes to 419ppm. These devices are easy to calibrate. My first gauge was accurate so I bought a second gauge for a friend; it was so far away that there was no way to calibrate it. I would like to add that the second unit arrived used and I listed 'new'. So much for forcing Revain to buy filters…. Zero stars on the second device. So I returned the second one hoping to get a new calibrated block (I hope, I hope). With two quick taps you get a sample graph for CO2, humidity and temperature. It retains the date/time and all settings if you unplug or move it. The display will automatically dim when the light is turned off. What it does and the settings are easy to understand. It has a 2-channel NDIR sensor and is said to last 15 years. Powered by a wall socket ensures continuous selection/use. Cons: The power supply is too short, but it's a regular USB cable. and I will buy a longer one. It seems to be one of those Chinese "hit or miss" products - great if you can get a good working unit, but the quality control seems typically Chinese. Now for the interesting part: I was diagnosed with mild sleep apnea but refused to wear a Darth Vader mask. My PV corrected me and said there are pillows that are easy to carry. I asked about cylinders of oxygen and was told these units only use room air!?! Why indoor air? It made no sense - when you have apnea you breathe room air, oxygen makes no sense? Then I started to wonder if the game had "stagnant air" or "too tight house". That's why I did some research and decided on this measuring device. Results? striking. I placed the device next to my chair and around 10:00pm it hit 1599ppm. I took it to my bedroom and got the same readings. I put it outside the next day and after 15 minutes I was reading 435 so it works fine. The day after I got a high reading indoors, I decided to open my bedroom window that night and the reading was around 980ppm. Not perfect, but a lot better than the 1500s. Too short a rehearsal, but for the last 3 nights I've felt a lot better after waking up. I usually walk around like a zombie and take an hour or two to wake up. So I'm continuing my "research" but here's the bottom line: High CO2 contributes to poor sleep and is it incorrectly labeled as sleep apnea? Is IE the solution to many people's insomnia, simple ventilation, not a Darth Vader mask? I researched the "too tight house" problem and concluded that I probably needed an ERV. Not HRV, but for my climate and home, ERV is better. My house is small so I'm probably looking at the Panasonic WhisperComfort FV-04VE1 to solve the CO2 problem. So now I need to find it, find a place in my little house to install it, find a contractor who understands how to install it. In the meantime I'll open the window to help, but with extreme winter temperatures approaching I can't do that all winter, especially now that the stove is on. BUT, I think I'll soon find out why I'm tired all the time, yawn too much and don't sleep well. In summary, this meter turned out to be a smart purchase. 5 Stars….