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10.1016/j.buildenv.2021.107633 http://scihub22266oqcxt.onion/10.1016/j.buildenv.2021.107633 33531734!7844370!33531734     free     free     free Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Build+Environ 2021 ; 197 (ä): 107633 Nephropedia Template TP {{tp|p=33531734|t=2021. Investigation of potential aerosol transmission and infectivity of SARS-CoV-2 through central ventilation systems |pdf=|usr=}}{{33531734}} gab.com Text Investigation of potential aerosol transmission and infectivity of SARS-CoV-2 through central ventilation systems JO: Build Environ http://www.kidney.de/pget.php?&tw=1&pmid=33531734 #FOAvip The COVID-19 pandemic has raised concern of viral spread within buildings. Although near-field transmission and infectious spread within individual rooms are well studied, the impact of aerosolized spread of SARS-CoV-2 via air handling systems within multiroom buildings remains unexplored. This study evaluates the concentrations and probabilities of infection for both building interior and exterior exposure sources using a well-mixed model in a multiroom building served by a central air handling system (without packaged terminal air conditioning). In particular, we compare the influence of filtration, air change rates, and the fraction of outdoor air. When the air supplied to the rooms comprises both outdoor air and recirculated air, we find filtration lowers the concentration and probability of infection the most in connected rooms. We find that increasing the air change rate removes virus from the source room faster but also increases the rate of exposure in connected rooms. Therefore, slower air change rates reduce infectivity in connected rooms at shorter durations. We further find that increasing the fraction of virus-free outdoor air is helpful, unless outdoor air is infective in which case pathogen exposure inside persists for hours after a short-term release. Increasing the outdoor air to 33% or the filter to MERV-13 decreases the infectivity in the connected rooms by 19% or 93% respectively, relative to a MERV-8 filter with 9% outdoor air based on 100 quanta/h of 5 mum droplets, a breathing rate of 0.48 m(3)/h, and the building dimensions and air handling system considered. Twit Text FOAVip Investigation of potential aerosol transmission and infectivity of SARS-CoV-2 through central ventilation systems ????Build Environ http://www.kidney.de/pget.php?&tw=1&pmid=33531734 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=33531734 #FOAvip English Wikipedia <ref>{{Cite pmid|33531734}}</ref> Investigation of potential aerosol transmission and infectivity of SARS-CoV-2 through central ventilation systems #MMPMID33531734 Pease LF; Wang N; Salsbury TI; Underhill RM; Flaherty JE; Vlachokostas A; Kulkarni G; James DP Build Environ 2021[Jun]; 197 (ä): 107633 PMID33531734show ga The COVID-19 pandemic has raised concern of viral spread within buildings. Although near-field transmission and infectious spread within individual rooms are well studied, the impact of aerosolized spread of SARS-CoV-2 via air handling systems within multiroom buildings remains unexplored. This study evaluates the concentrations and probabilities of infection for both building interior and exterior exposure sources using a well-mixed model in a multiroom building served by a central air handling system (without packaged terminal air conditioning). In particular, we compare the influence of filtration, air change rates, and the fraction of outdoor air. When the air supplied to the rooms comprises both outdoor air and recirculated air, we find filtration lowers the concentration and probability of infection the most in connected rooms. We find that increasing the air change rate removes virus from the source room faster but also increases the rate of exposure in connected rooms. Therefore, slower air change rates reduce infectivity in connected rooms at shorter durations. We further find that increasing the fraction of virus-free outdoor air is helpful, unless outdoor air is infective in which case pathogen exposure inside persists for hours after a short-term release. Increasing the outdoor air to 33% or the filter to MERV-13 decreases the infectivity in the connected rooms by 19% or 93% respectively, relative to a MERV-8 filter with 9% outdoor air based on 100 quanta/h of 5 mum droplets, a breathing rate of 0.48 m(3)/h, and the building dimensions and air handling system considered. äInvestigation of potential aerosol transmission and infectivity of SAR(epmc).pdf DeepDyve Pubget Overpricing