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Inquiry about: Smart Air Quality Detection H2S CO NO NO2 SO2 O3 Sensors with GPRS/ GSM/ WIFI module Hello, I'm Pawel from Poland. I'm looking for some air quality detector with PM 2.5, co2, humidity, temperate etc. detection for ERV fan (heat recovery ventilator) for residential ventilation unit - which I'm producer. What can you offer for me? Which one of your product I can put inside of my ERV units? P.S. I'm also interested in hard discs with software and application for my ventilation ERV units. Best Regards Pawel Jasko Wechat: Pawel_Jasko Cell: +48-***171