sjdeer25
Mechanical
- Oct 16, 2007
- 2
hello i have just a general question....
the formula Q=4.5 x CFM x (delta h) i know this is standard formula at sea level but my question that i havent determuned is where does the 4.5 constant get derived from..what are the specifics of that constant and does it change upon ones change in elevation.
the formula Q=4.5 x CFM x (delta h) i know this is standard formula at sea level but my question that i havent determuned is where does the 4.5 constant get derived from..what are the specifics of that constant and does it change upon ones change in elevation.