aaasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfaasdfasdfasdfasdfaPolyCon announces that they have successfully passed the U-Burn Test, which is the most recent version of the Unvented Attic Oxygen Starvation Test with the PC 450, becoming one of few companies to pass this updated version of the test.