Dear Rolando, Yes, you are absolutely correct that temperature, as well as Relative Saturation and Relative Humidity, may vary within the site. If we want to avoid condensation during vH2O2 bio-decontamination process in an environment with temperature differences, we have to know what is the lowest temperature. If we do not know that, we recommend measuring mixture dewpoint Td with the HPP272 probe and measuring the temperature at different locations with additional temperature sensors. If measured temperature equals to or is lower than mixture dewpoint, then there might be condensation.