I used Brown's Plumbing & Heating to install a furnace I have and they most recently were supposed to clean it. I don't think they did a great job based on the results that I got, and overall, I thought that their service was a little bit pricey. But I did think that the staff was very friendly and professional, at least. So I do appreciate the good service that they provided. Hopefully, the furnace will continue to run for a few more years.