it would be possible but rather very inaccurate to calculate flow based on power (you did not provide this information) and efficiency as electrical energy is transferred into fluid kinetic energy ---> therefore, the density is needed too
here is a spreadsheet - sorry for confusion (I made some mistake in estimation od air properties)http://files.engineering.com/getfile.aspx?folder=ba4b94ad-d72d-465a-af14-64eda5988dd2&file=dp.xls
