IAQ Series： Fresh air intake filter
Outdoor air has various pollutants and it could badly affect IAQ and health of occupants if it is not properly filtered before entering into a building. Outdoor air contains various pollutants especially in busy commercial zones. It contains high levels of particulate matter (PM), NOx, SOx, pollen, etc. If it is not properly filtered before […]
Use two stages filtration for Air Handling Unit (AHU) in office buildings
Malpractices of application of air filters (2) Use metal mesh filter for Fan Coil Unit Pre-filter (metal mesh or panel filter) with primary filter (bag filter or panel filter) are commonly used on AHU at office buildings in Hong Kong. It is believed that the pre-filter could extend the working life of primary filter at downstream. […]
Use metal mesh filter for Fan Coil Unit
Malpractices of application of air filters(1) Use metal mesh filter for Fan Coil Unit Metal mesh air filter is commonly used as an air filtration device for fan coil unit (FCU) in Hong Kong. Is it the only choice that we can take? As shown in the graphs below, metal mesh filter has very low filtration efficiency (>27%) for […]
