The impact of green facades can influence the thermal sensations of an outdoor environment, although the impact varies between buildings. In a 2025 study, Assessing green walls' effects on outdoor human thermal exposure in temperate climate cities (Scientific Reports, DOI: 10.1038/s41598-025-26214-7), scientists from Palacký University Olomouc and the Institute of Computer Science of the Czech Academy of Sciences investigated five green wall case studies in Czech cities, measuring air temperature and three human thermal exposure indices: MRT (mean radiant temperature), UTCI (universal thermal climate index) and PET (physiologically equivalent temperature). The study was published in Scientific Reports in November 2025, based on fieldwork carried out during hot summer days in 2024, with measurements conducted 0.5 metres from the investigated walls. Of the five sites investigated, the largest decrease in radiant heat load was found in the Holešovice district of Prague.
Holešovice recorded a 6.4 K lower Mean Radiant Temperature
