EBM PAPST D4E160-DA01-22 AC FAN, CENTRIFUGAL, 160MM, 230V

hello my name's simon brad well for a me BM papst here in melbourne and today i'm going to talk to you about centrifugal fans as we've had quite a lot of questions recently asking us what is a centrifugal fan I've got a range of centrifugal fans here in front of me and and each of these fans turns air through 90 degrees I've got two forward curve fans one without housing this one here and one with housing this one here and I've got a backward curve centrifugal fan one of our radical fans and to explain the air the air comes in here and gets thrown out at 90 degrees by the backward curved blades and and this is also shown in this short illustration here there are five standard types of centrifugal fan which are defined by their blade type first of all there's a backward curved blade secondly a backward curved inclined blade thirdly a backward curved inclined aerofoil blade then there's a