As with any air monitor, where you position the ViewPlus will affect certain readouts. For instance, if you happen to place the monitor right beside a fresh cup of tea, with the side air intakes pointing at said tea, expect that temperature readout to rise! After my unintentional tea 'experiment', I also experimented by putting the monitor right by my face for several minutes. Lo and behold, the CO2 levels rose… to a whopping 3000 in just five minutes, from 1700 before. This was no big surprise, given that humans exhale CO2. All that to say, be mindful of where you place the monitor. Avoid putting it too close to you or to any heating or cooling appliances, and perhaps don’t place it beside an open vat of formaldehyde, should you happen to have one hanging around.