@healthyindoorair: If you see dark spots or smell something musty, it could be MOLD! Mold loves dark, damp places like your HVAC Duct system, and every time it runs, you’re breathing it in. 🦠 😷 #MoldInVents #CleanAirHouston #AirDuctCleaning #HealthyEnvironmentLLC #HoustonHomes #MoldFreeLiving #BreatheCleanHouston #IndoorAirQuality