• Assessing the indoor air quality and their predictor variable in 21 home offices during the Covid-19 pandemic in Norway 

      Justo Alonso, Maria; Moazami, Therese Nitter; Liu, Peng; Jørgensen, Rikke Bramming; Mathisen, Hans Martin (Peer reviewed; Journal article, 2022)
      In this study, concentrations of pollutants: formaldehyde, carbon dioxide (CO2), and total volatile organic compounds (TVOC) and parameters: indoor room temperature and relative humidity (RH) were measured in 21 home offices ...
    • Evaluation of low-cost formaldehyde sensors calibration 

      Justo Alonso, Maria; Madsen, Henrik; Liu, Peng; Jørgensen, Rikke Bramming; Jørgensen, Thomas Berg; Christiansen, Even Johan; Myrvang, Olav Aleksander; Bastien, Diane; Mathisen, Hans Martin (Peer reviewed; Journal article, 2022)
      Low-cost sensors (LCS) are becoming ubiquitous in the market; however, calibration is needed before reliable use. An evaluation of the calibration of eight identical pre-calibrated formaldehyde LCS is presented here. The ...
    • A methodology for the selection of pollutants for ensuring good indoor air quality using the de-trended cross-correlation function 

      Justo Alonso, Maria; Wolf, Sebastian; Jørgensen, Rikke Bramming; Madsen, Henrik; Mathisen, Hans Martin (Peer reviewed; Journal article, 2021)
      CO2 is customarily used to control ventilation as it is a proxy for bio-effluents and pollutants related to the presence and activity of people in the room. However, CO2 could not be a satisfactory indicator for pollutants ...