marcoh, yes that thing about temperatures still bothers me.
I have found this page http://www.engineeringtoolbox.com/air-density-temperature-fan-capacity-d_144.html about this matter, but still don’t understand. Why in the "Fan with Hot Air" example they leave 10 000 m3/h without correction, and...
Its just because at the moment I working with direct driven centrifugal fans labeled for normal conditions (max. 130 C) and for high air (max. 250C). And I dont see any difference exept the price, so wanna know where is the trick :)
What is special in construction of direct driven centrifugal fans for hot air transportation (air temperature over 200 Celsius degree)? My guess main requirement is motor selection with right thermal insulation. Any other suggestions?
Thank You
