Cover -- Contents -- 1. Fan history, types and characteristics -- 1.1 Introduction -- 1.2 Ancient history -- "Not our sort of fan" -- 1.3 Definitions and classification -- 1.4 Fan characteristics -- 1.5 Centrifugal fans -- 1.6 Axial flow fans -- 1.7 Propeller fans -- 1.8 Mixed flow fans -- 1.9 Miscellaneous fans -- 1.10 Bibliography -- 2. The properties of gases -- 2.1 Explanation of terms -- 2.2 The gas laws -- 2.3 Humidity -- 2.4 Compressibility -- 2.5 Hazards -- 2.6 Bibliography -- 3. Air and gas flow -- 3.1 Basic equations -- 3.2 Fan aerodynamics -- 3.3 Ductwork elements -- 3.4 Friction charts -- 3.5 Losses in fittings -- 3.6 Air duct design -- 3.7 Balancing -- 3.8 Notes on duct construction -- 3.9 Duct design for dust or refuse exhaust -- 3.10 Bibliography -- 4. Fan performance Standards -- 4.1 Introduction -- 4.2 Laboratory Standards -- 4.3 Determining the performance of fans in-situ -- 4.4 Installation category -- 4.5 Testing recommendations -- 4.6 Fan Laws -- 4.7 Specific values -- 4.8 Bibliography -- 5. Fans and ducting systems -- 5.1 Introduction -- 5.2 Air system components -- 5.3 System curves -- 5.4 Multiple fans -- 5.5 Fan installation mistakes -- 5.6 System effect factors -- 5.7 Bibliography -- 6. Flow regulation -- 6.1 Introduction -- 6.2 The need for flowrate control -- 6.3 Damper control -- 6.4 Variable speed control -- 6.5 Variable geometry fans -- 6.6 Conclusions -- 7. Materials and stresses -- 7.1 Introduction -- 7.2 Material failure -- 7.3 Typical metals -- 7.4 Engineering plastics -- 7.5 Surface finishes -- 7.6 Surface protection -- 7.7 Stressing of centrifugal impeller -- 7.8 Stressing of axial impellers -- 7.9 Shaft design -- 7.10 Fan casings -- 7.11 Mechanical fitness of a fan at high temperatures -- 7.12 Conclusions -- 7.13 Bibliography -- 8. Constructional features -- 8.1 Introduction -- 8.2 Inlet boxes -- 8.3 Other constructional features and ancillaries -- 8.4 Gas-tight fans -- 8.5 Shaft seals -- 8.6 Fans operating at non-ambient temperatures -- 8.7 High pressure fans -- 8.8 Construction features for axial and mixed flow fans -- 8.9 Bibliography -- 9. Fan arrangements and designation of discharge position -- 9.1 Introduction -- 9.2 Designation of centrifugal fans -- 9.3 Designations for axial and mixed flow fans -- 9.4 Belt drives (for all types of fan) -- 9.5 Direct drive (for all types of fan) -- 9.6 Coupling drive (for all types of fan) -- 9.7 Single and double inlet centrifugal fans -- 9.8 Other drives -- 9.9 Bibliography -- 10. Fan bearings -- 10.1 Introduction -- 10.2 Theory -- 10.3 Plain bearings -- 10.4 Anti-friction or rolling element bearings -- 10.5 Needle rollers -- 10.6 CARB® toroidal roller bearings -- 10.7 R.