Was sceptical to start with till I saw the dust, dirt, pet hair and other indescribable stuffs coming out of my vent. Gosh, can’t believe I been breathing in dirty air all these years. My insomnia started to get better immediately and been sleeping soundly. Ductmates’ technician was very professional as he really made an effort to show me before and after pics with air quality check. That’s real solid proof to me. Money truly well spent.