An equation for the frictional pressure loss \(\Delta p\) (inches \(\mathrm{H}_{2} \mathrm{O}\) ) in a circular duct of inside diameter \(d\) (in.) and length \(L\) (ft) for air flowing with velocity \(V(\mathrm{ft} / \mathrm{min})\) is

\[ \Delta p=0.027\left(\frac{L}{d^{1.22}}\right)\left(\frac{V}{V_{0}}\right)^{1.82} \]

where \(V_{0}\) is a reference velocity equal to \(1000 \mathrm{ft} / \mathrm{min}\). Find the units of the "constant" 0.027.