Maximize Fan Performance by Understanding Fan Laws
Discover the key principles driving fan performance in our Fan Laws article. For quick reference on relationships between fan speed, size and air density, check out our Fan Laws – Quick Reference.

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Our powerful software selection tool can help you make fast and accurate centrifugal fan selections based on your specific system requirements. Choose from a full collection of dynamic tools, specs and materials, along with temperature requirements, measurements, direct drive speeds and more.
Discover the key principles driving fan performance in our Fan Laws article. For quick reference on relationships between fan speed, size and air density, check out our Fan Laws – Quick Reference.
| Custom Available | Dry Air or Gas | Moderate Dirt or Moisture | Typical Max. Temp. | Static Pressure Range | Flow Range | Applications | |||
| Fahrenheit (Celsius) | Inches Water Gauge (Millimeter Water Gauge) | Cubic Feet Per Minute | |||||||
| Low Flow Radial Blade (LFRB) | ![]() | ![]() | ![]() | ![]() | 250˚F (121˚C) | 1-14 In. WG (25-356 mm WG) | 100-2500 CFM (170-4248 m3/hr) | Scrubber exhaust, gas exhaust, ovens, light dust material handling. |
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| Pressure Blowers (PB) | ![]() | ![]() | ![]() | ![]() | 250˚F (121˚C) | 14-60 In. WG (356-1524 mm WG) | 100-5500 CFM (170-9345 m3/hr) | Combustion air cooling, gas boosting , fluidized beds, dilution air, glass cooling, light dust material handling, pneumatic conveying. |
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| High Pressure Radial Blade (HPRB) | ![]() | ![]() | ![]() | ![]() | ![]() | 1200˚F (649°C) | 14-125 In. WG (356-3175 mm WG) | 100-100,000 CFM (170-169900 m3/hr) | Any low flow high pressure system, any heavy duty rugged application, wet scrubber exhaust, cooling, combustion air, fluidized beds, glass cooling, light dust material handling, pneumatic conveying. |
| General Industrial (GI) | ![]() | ![]() | ![]() | ![]() | ![]() | 800˚F (427°C) | 14-60 In. WG (356-1524 mm WG) | 500-100,000 CFM (850-169900 m3/hr) | Wheel designs for clean air and material handling process applications. Material conveying, dust laden or particulate gas streams, wet scrubbers, paper trim, plastic trim, steel trim. |
| Radial Tip (RT) | ![]() | ![]() | ![]() | ![]() | ![]() | 1200˚F (649°C) | 25-70 In. WG (635-1778 mm WG) | 4000 - 120,000 CFM (6796-203880 m3/hr) | Harsh environments with wet or dirty gas streams and higher volumes. |
| High Pressure Backwardly Curved (HPBC) | ![]() | ![]() | ![]() | ![]() | ![]() | 800˚F (427°C) | up to 85 In. WG (up to 2159 mm WG) | up to 70,000 CFM (up to 118930 m3/hr) | High efficiency design for medium to high pressure applications. Air supply for boilers and oxidizers, glass cooling, lightly dust laden gas streams and/or corrosive applications. |
| High Pressure Air Foil (HPAF) | ![]() | ![]() | ![]() | ![]() | ![]() | 800˚F (427°C) | up to 82 In. WG (up to 2083 mm WG) | up to 125,000 CFM (up to 212375 m3/hr) | Non-overloading very efficient design over a broad range of high pressure system requirements. Most often used in combustion air and forced draft applications. |
| Backwardly Inclined (BI) | ![]() | ![]() | ![]() | ![]() | 800˚F (427°C) | 10-25 In. WG (254-635 mm WG) | 5000-180,000 CFM (8495-305820 m3/hr) | Non-overloading high efficiency design for clean air applications. Bag house, induced draft, forced draft. |
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| Airfoil (AF) | ![]() | ![]() | ![]() | ![]() | 800˚F (427°C) | 10-25 In. WG (254-635 mm WG) | 5000-180,000 CFM (8495-305820 m3/hr) | Non-overloading high efficiency design for clean air applications, induced draft, forced draft. |