Pressure Drop in Ventilation Components
Normal pressure drops in some common ventilation system components - dampers, filters, heaters, coolers and more
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The table below can be used as a guide to normal pressure drops in common ventilation components and fittings.
| Pressure Drop (Pa) | ||||||
| Component Type | Air Velocity (m/s) | |||||
| 2.0 | 2.25 | 2.5 | 2.75 | 3.0 | ||
| Intake damper | 5 | 5 | 5 | 5 | 5 | |
| Mixing chamber | straight | 35 | 45 | 55 | 70 | 85 |
| 90o | 40 | 55 | 70 | 85 | 100 | |
| Filter | short EU2 | 70 | 75 | 80 | 90 | 95 |
| short EU3 | 100 | 110 | 120 | 135 | 145 | |
| long EU3 | 70 | 75 | 80 | 80 | 85 | |
| long EU5 | 115 | 125 | 140 | 150 | 165 | |
| long EU7 | 140 | 150 | 165 | 175 | 185 | |
| long EU9 | 160 | 175 | 190 | 210 | 230 | |
| Heater | water, size 1 | 5 | 5 | 10 | 10 | 10 |
| water, size 2 | 10 | 15 | 15 | 20 | 20 | |
| water, size 3 | 20 | 25 | 30 | 30 | 35 | |
| electrical, size 1 | 10 | 10 | 15 | 15 | 20 | |
| electrical, size 2 | 15 | 20 | 30 | 35 | 40 | |
| electrical, size 3 | 35 | 45 | 55 | 70 | 85 | |
| Cooler | size 1 | 20 | 25 | 30 | 35 | 40 |
| size 2 | 25 | 35 | 40 | 45 | 55 | |
| size 3 | 35 | 45 | 50 | 60 | 70 | |
| drop separator | 45 | 50 | ||||
| Humidifier | 60% | 50 | 60 | 75 | 90 | 110 |
| 90% | 75 | 100 | 120 | 160 | 180 | |
| Noise damper | 750 mm | 5 | 10 | 10 | 15 | 15 |
| 1425 mm | 10 | 15 | 15 | 20 | 25 | |
| Rotating heat exchanger | big rotor | 120 | 140 | 160 | 180 | 195 |
| little rotor | 150 | 170 | 195 | 220 | 245 | |
| Air-fluid-air exchanger | lamella 2 mm, size 1 | 50 | 60 | 75 | 90 | 105 |
| lamella 2 mm, size 2 | 75 | 90 | 110 | 130 | 155 | |
| lamella 2 mm, size 3 | 95 | 120 | 145 | 175 | 205 | |
| lamella 4 mm, size 1 | 30 | 35 | 45 | 55 | 65 | |
| lamella 4 mm, size 2 | 45 | 55 | 65 | 80 | 90 | |
| lamella 4 mm, size 3 | 55 | 70 | 85 | 100 | 120 | |
| drop separator | 45 | 50 | ||||
| Plate exchanger | 65 | 80 | 105 | 125 | 150 | |
| with drop separator | 200 | |||||
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