[AirVisual Pro Air Quality Monitor] Monitor Indoor Air Quality [PM2.5, CO2, AQI, Temperature, Humidity] Real-Time Air Quality & Forecasting, Historic Data, IFTTT

We have trouble with a burner next door which is lit pretty well 24 hours a day. So we cannot generally open our windows or venture outside without a mask.Have had the outside air monitor since early February, linked to the app on my phone but it’s a pain to be constantly finding phone to check before attempting to go into the garden. In addition, humidity and CO2 levels indoors are a concern because of closed air vents and windows because of often high levels of particulates around our home.So now we know where we are and hopefully will know quickly when we have a chance to open windows.It was fairly easy to set up. No real instructions but a google can track down answers to questions.Well worth buying. There are a fair number of outdoor IQAir stations in the UK. It is possible to link to a town monitor for outside air but it won’t be as precise as one just outside your premises.It came with an EU adapter but a spare UK one that I had has worked.I am very pleased with my IQAir purchases.

I've got 4 of these monitors in various rooms round the house. The oldest is 5 years old and the newest bought a year or so ago.They have a nice display and very user friendly. Information presented in an easy to digest format.However there are two significant issues.Number one is the failure rate. My 5 year old monitor has just packed up. Its still working ( You can hear the fan ) but the display is blank! No amount of resetting by switching fully off and on has helped. Ironically I set the screen to lowest brightness and had it automatically switch off every night to extend the device's lifespan.A second monitor - about 4 years old - has had it battery pack up. As long as its plugged in the the mains via USB its fine - but within 10 seconds of taking power away it dies.The other big issue that is a problem for all 4 monitors is their CO2 accuracy.I noticed they reported CO2 levels 40% lower than another device ( Aranet4 ) . I assumed the device was incorrect but read a review that it was very accurate. I borrowed a friends professional calibrated CO2 monitor and discovered it was the Aranet4 that was correct and the AirVisual that was underestimating CO2 by about 40 -50%I suspect the reason is the AirVisual's auto CO2 calibration. Over time it automatically adjusts CO2 readings. But I think because my rooms CO2 doesn't often go below 600ppm and is often 900ppm the monitor is using that as a baseline. With many CO2 monitors you can switch off auto calibration and do a manual calibration instead. But the AirVisual no longer seems to have this as an option. With Aranet CO2 monitors I put them outside and engage manual calibration via the app. Doing this every 6 months seems to prevent the inaccuracy you see with the AirVisual.While in many ways the AirVisual is a lovely device - it looks nice and has some useful features - I don't think I'd be buying another one due to the high failure rate and poor CO2 accuracy.