Establishing criteria for sidewall air inlet performance and evaluation offour commercial inlets on this criteria

Four commercially available sidewall air inlets and one sharp-edged rectang ular opening were tested in a frill-scale building section under similar is othermal conditions. Large differences were found between inlets for airjet spl ead, axial velocity decay airjet throw: and entrainment ratio. A crite rion was derived for evaluating inlets utilizing airjet throw, airjet spl e ad, entrainment ratio, and animal-level velocity. The criterion developed h ighlighted some deficiencies of the commercially available inlets at a reco mmended building operating pressure of 12.4 Pa.