Risk of Cross-Infection in a Hospital Ward with Downward Ventilation

Peter V. Nielsen, Yuguo Li, Morten Buus, Frederik Vildbrad Winther

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

43 Citationer (Scopus)


A two-bed hospital ward with one standing healthcare person and a ceiling-mounted lowimpulse semicircular inlet diffuser is simulated in a full-scale room. Tracer gas is used for simulating gaseous contaminants, and the concentration is measured at different air change rates and different postures of the patients. A textile partition between the beds, which is typical in a hospital ward, is used for protection of the patients in some of the experiments. Three different layouts of return openings are tested. One layout with one opening at the ceiling, another with four openings at the wall opposite to the inlet diffuser, and one with a high location of these four openings. The downward recirculating flow is on average parallel with the partition, and in most cases the partition does not decrease cross-infection. A high location of the four return openings decreases the risk of cross-infection.
TidsskriftBuilding and Environment
Udgave nummer9
Sider (fra-til)2008-2014
Antal sider7
StatusUdgivet - 2010


  • Cross-infection
  • Downward ventilation
  • Return opening location
  • Hospital ward
  • Room air distribution
  • Full-scale experiments

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