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Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.
A modern ceiling fan A ceiling fan mid-spin. A ceiling fan is a fan mounted on the ceiling of a room or space, usually electrically powered, that uses hub-mounted rotating blades to circulate air.
The Grand Organ is the fifth-largest in Great Britain, [c] [79] in terms of number of pipes (7,256), [80] with 5 manuals, 136 ranks of pipes and 137 stops, principally enclosed in an impressive case designed in Wren's workshop and decorated by Grinling Gibbons. [81] Details of the organ can be found online at the National Pipe Organ Register.