Labels:shelf OCR: MASTERSPEC EVALUATIONS 8/93 Water- -penetration testing measures the weight of water in ounces per sa of Jouver free area passing from the louver' exterior the interior at various ar intake velocities It is important to realize that the test IS based on still air conditions and simulates the effect of falling rain and rain flowing down the wetted surface of building over louver This test was backed an by the Masterspec P 1993 because was the best the industry had to offer ckea industri
