{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T04:25:48Z","timestamp":1787286348838,"version":"build-2736575974"},"reference-count":43,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T00:00:00Z","timestamp":1787011200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000125","name":"National Institute for Occupational Safety and Health","doi-asserted-by":"publisher","award":["T42OH008414"],"award-info":[{"award-number":["T42OH008414"]}],"id":[{"id":"10.13039\/100000125","id-type":"DOI","asserted-by":"publisher"}]},{"award":["T42OH008414"],"award-info":[{"award-number":["T42OH008414"]}],"id":[{"id":"https:\/\/ror.org\/0502a2655","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In recent years, the demand for indoor radon and air quality monitors has increased while more affordable consumer-grade monitors have become available. The aim of our study was to assess the validity of the less expensive, non-calibrated, consumer-grade L\u00fcft (SunRADON LLC, Melbourne, FL, USA) compared to the more expensive, annually and manufacturer calibrated, industrial-grade Model 1028 XP (SunRADON LLC, Melbourne, FL, USA). We collected data about 24 h moving averages of barometric pressure, carbon dioxide (CO2), radon, relative humidity, temperature, and volatile organic compounds (VOC) for approximately 29 weeks in 2024 in each of six rooms in a school in Utah. The mean difference in the co-located L\u00fcfts\u2019 and Model 1028 XPs\u2019 24 h moving average radon was \u22120.05 pCi\/L of air (95% confidence interval: \u22120.24, 0.14, p = 0.50) and the concordance correlation coefficient (CCC) was 0.92. The L\u00fcfts\u2019 and Model 1028 XPs\u2019 24 h moving averages were similar for barometric pressure (CCC: 0.87), but the L\u00fcfts\u2019 24 h moving averages were lower than the Model 1028 XPs\u2019 for CO2, relative humidity, and VOC and higher for temperature. The L\u00fcft provided valid measurements of 24 h moving averages for barometric pressure and radon, but not for CO2, relative humidity, temperature, and VOC.<\/jats:p>","DOI":"10.3390\/s26165230","type":"journal-article","created":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T13:11:57Z","timestamp":1787058717000},"page":"5230","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Long-Term Validation of a Consumer- vs. Industrial-Grade Indoor Radon and Air Quality Monitor at a School in Utah"],"prefix":"10.3390","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7156-0887","authenticated-orcid":false,"given":"John D.","family":"Beard","sequence":"first","affiliation":[{"name":"Department of Public Health, Brigham Young University, Provo, UT 84602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maren M.","family":"Ball","sequence":"additional","affiliation":[{"name":"Department of Public Health, Brigham Young University, Provo, UT 84602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-9773-2553","authenticated-orcid":false,"given":"Christopher","family":"Kitras","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Brigham Young University, Provo, UT 84602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8276-4842","authenticated-orcid":false,"given":"Philip B.","family":"Lundrigan","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Brigham Young University, Provo, UT 84602, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Grzywa-Celi\u0144ska, A., Krusi\u0144ski, A., Mazur, J., Szewczyk, K., and Kozak, K. 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