Remember a fan 'sees' what it's inlet conditions are. I also developed a little spread sheet that figures this stuff out pretty quick and includes altitude, temperature, relative humidity and inlet static pressure. A fan is shovel, the blade is the same size if moving sand or gravel, work required changes.Īpparently there is an equation writer in the forum that I need to figure out. What changes is the motor horsepower due to air density (as well as friction loss which is proportional to air density). A fan, at any given speed is a CONSTANT VOLUME device, meaning a fan at sea level set to deliver 1,000 cfm will try to deliver 1,000 CFM at 5,500 feet or at 100 degrees F or -40 degree F. McQuay maybe giving you an answer but you need to look at your system. ductulator analyzer software sizer free download, file steam file app hvac The fan free and heat basic duct sharing help, a sizing psychrometrics mcquay. Ignoring relative humidity for now which actually makes air LESS dense as it increases. Mass flow, not volumetric, however pay attention to where your fan is. Psychrometric Calculator (in part 1) McQuay Duct Sizer (in part 2) McQuay Pipe Sizer (in part 2) AutoCAD- basics for HVAC (in part 2) Revit- basics for HVAC (in part 2) What else will you get Free E-20 Excel Sheet For Load Calculation Doubts answered in less than 1 day Free Handbooks Free Databook able Files/Links of Free Software Life Course.
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