FAN LAWS
Formulae 1 to 4 can be applied to any fan provided the diameter does not change. If the diameter does not change the fans must be geometrically similar. The units of density, fan rotational speed and diameter are not important as long as both are the same. In formulae 5 to 8 the units shown in the nomenclature must be used to satisfy the formulae Volume Flow Pressure Absorbed Power Sound Power Level Density Fan Total Efficiency % Fan Total…