Conducted during the COVID19 pandemic; hence, there measurements were taken weekly in a variety

Conducted during the COVID19 pandemic; hence, there measurements were taken weekly in a variety of areas and depended on facility availability. were some restrictions regarding the during winter measuring devices. For that reason, the Measurements had been conducted weekly installation of (December)–(W), spring (April)– measurements were taken weekly in several locations and depended on facility availabil (S), and at the end of spring (June)–(LS). ity. Due to the presence of young children inweekly through winter (December)–(W), period Measurements were carried out different rooms in the course of the day, the days spring (April)–(S), and in the finish of spring (June)–(LS). had been divided into 3 components: As a result of presence of young children in different rooms through the day, the days period Morning time (MT), playtime within the playroom; had been divided into 3 parts: Nap time (NT) within a committed sleeping room;Morning time (MT), playtime inside the playroom; Afternoon time (AT), playtime inside the playroom.Energies 2021, 14,5 ofTable 2 shows the measurement dates and measurement periods.Table two. Measurement periods for the four analysis groups. Nursery (Analysis Group) Indoor and outdoor air high quality assessment Winter time (W) Spring time (S) Late spring time (LS) Morning time (MT) Nap time (NT) Afternoon time (AT) Site visitors assessment Winter time (W) Late spring time (LS) 1 December 2020 7 June 2021 4 December 2020 8 December 2020 193 April 2021 071 June 2021 8:001:00 11:003:00 13:005:00 8:001:00 11:003:00 13:005:00 Nap time inside the exact same area (11:304:00) 026 December 2020 B1 B2 B3 B- -8:006:- -8:001:30 11:303:30 13:306:–2.4. Indoor and Outside Air High quality Assessments two.4.1. Measuring Devices For air quality measurements, measuring equipment was employed for continuous monitoring from the following air parameters: particulate matter concentration PM2.five, PM10 ( /m3), temperature ( C), relative humidity, in indoor and outside air, and the indoor concentration of carbon dioxide (ppm). Measurements were made with NEMo Outside and NEMo XT mini devices by Ethera (France). The devices have been calibrated. The accuracies and measuring ranges of your devices employed are listed in Table 3.Table 3. Measuring device characteristics utilised for IAQ and OAQ measurements. Parameter Detection system Measuring variety Carbon dioxide Resolution Accuracy Detection Perospirone References method Temperature Measuring range Resolution Accuracy Detection method Relative humidity Measuring range Resolution Accuracy Detection method PM2.5/PM10 Measuring variety Resolution Accuracy NEMo XT Mini NEMo Outside Non-dispersive infrared spectrometry 0000 ppm 1 ppm0 ppmCMOS (Complementary Metal-Oxide-Semiconductor) (-55)125) C 0.08 C.5 CCapacitive 05 0.08Laser-based light scattering 0000 /m3 1 /mEnergies 2021, 14,6 ofDevices for monitoring opening windows have been also made use of, which registered the opening of a window in the zero ne system, an open window (1), and a closed window (0). two.4.two. Methodology Air good quality was assessed when it comes to CO2 concentration and particulate matter. The average concentrations of those selected indicators were determined through the children’s stay within the nursery, accounting for the time of their stay in the playroom and sleeping area. The assumed evaluation criteria for superior IAQ are as follows:The average concentration of CO2 below1200 ppm, as well as the maximum concentration under 1500 ppm; The maximum concentration of PM10 beneath 50 /m3 ; The maximum concentration of PM2.five below 25 /m3 .The ratio with the indoor and outdoor concentra.