Living in a brownstone in the Bronx can be charming, but old air ducts are a whole other story. I found https://greenductors.com/new-york/air-duct-cleaning-bronx/ when I was looking for a local air duct cleaning company, and I'm glad I did. The team was thorough and extremely respectful of the space. They removed layers of dust and debris that had been sitting there for who knows how long. Since the cleaning, my asthma symptoms have decreased and even my dog seems to be breathing easier. I highly recommend contacting them if your system hasn't been cleaned in a while.