The density changes with the installation altitude or the geodetic altitude of the fan. The following table shows the density change as a function of the height above sea level at a constant temperature of 20°C.
Note for practice: Plant resistances decrease with increasingly thinner air
|
Height above sea level in |
Atmospheric pressure in |
Density in |
Conversion factor |
| 0 | 1013 | 1,2 | 1,000 |
| 500 | 955 | 1,13 | 0,941 |
| 1000 | 899 | 1,07 | 0,892 |
| 2000 | 795 | 0,94 | 0,780 |
| 3000 | 701 | 0,83 | 0,691 |
| 4000 | 616 | 0,73 | 0,610 |