RT Journal Article T1 Optimisation of thermal comfort and indoor air quality estimations applied to in-use buildings combining NSGA-III and XGBoost A1 Martínez Comesaña, Miguel A1 Eguía Oller, Pablo A1 Martínez Torres, Javier A1 Febrero Garrido, Lara A1 Granada Álvarez, Enrique K1 1299 Otras Especialidades Matemáticas AB Indoor environmental quality (IEQ) monitoring of in-use buildings has become essential in recent years due to the COVID-19 pandemic, as it significantly affects the well-being, health and productivity of building users. Nevertheless, knowing in real time the environmental conditions in large multi-zone areas is a difficult issue. Thus, the use of machine learning techniques to estimate indoor conditions has increased considerably. The aim of this paper is to present an interpolation model, based on an optimised extreme gradient boosting algorithm, to estimate every minute the indoor temperature, relative humidity and CO concentration inside buildings. These estimations are obtained without requiring permanent monitoring in the occupied zone. The optimisation, focused on finding the minimum number of monitoring devices needed to provide accurate interpolations, is performed using the multi-objective genetic algorithm NSGA-III. This methodology was applied in a research centre in the north-western Spain. The results show that the optimised or reduced model is capable of estimating indoor temperatures and relative humidity with relative errors below 6% and CO2 levels below 10%. PB Sustainable Cities and Society SN 22106707 YR 2022 FD 2022-05 LK http://hdl.handle.net/11093/3094 UL http://hdl.handle.net/11093/3094 LA eng NO Sustainable Cities and Society, 80: 103723 (2022) NO Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG NO Agencia Estatal de Investigación | Ref. RTI2018-096296-B-C2 DS Investigo RD 04-dic-2024