Duct System From Us Duct Articles & Analysis: Older
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Joining together small sections of duct represents a viable alternative to spiral duct. The classifications of joined-together duct take their names from joining methods used – welded flanged, vanstoned flanged, and clamp-together. ...
The issue of hospital acquired infections is a serious problem. According to several sources, three to four million hospital-acquired infections occur annually, with up to 80,000 fatalities. The costs of these infections are estimated to be between $4 billion and $5 billion per year (Air-Treatment Systems for Controlling Hospital acquired Infections, HPAC Engineering, April 2, 2008).Healthcare ...