Ceiling-Fan-Integrated Air Conditioning (CFIAC): Age-of-air, Air Pollution, and Airflow Distribution

Ceiling-Fan-Integrated-Air Conditioning (CFIAC) is a heating ventilation and air conditioning (HVAC) design approach that jets supply into the vicinity of ceiling fans to be mixed distributed within room. This eliminates terminal ductwork diffusers provides very efficient cooling for occupants. Two previously published papers have described velocity, temperature, thermal comfort fields in space conditioned by CFIAC. paper third this series, evaluate CFIAC effectiveness its effect on pollution. In test chamber, HVAC was jetted from high-sidewall vent centreline fan. The fan operated at various conditions (off, level 2-downward, 4-downward, blowing upward). Carbon dioxide (CO2) used as tracer gas age-of-air evaluation, proxy an indoor pollutant. For measurement, CO2 source injected side wall jet, monitored locations chamber. pollution test, released near manikin’s nose located middle concentrations were measured different around manikin. health exposure are represented intake fraction (IF). At 2 4 downward operations, reduced compared fan-off operation. upward operation equal operation, except one location farthest IF results similar among all with level-4-downward upward-fan operations slightly lower than level-2 operations. study considered preliminary, but point, we can say reduce cross-infection risk.