I am one who loves to burn incense in the house. It really relaxes me and it is also a good destresser. The only drawback of this was something that I found out recently. My local heating and air conditioning specialist was at my home doing their usual HVAC tune up and check up for the season, and they mentioned that my ductwork needed to be cleaned badly. I was confused as I just had cleaned the ductwork a few months earlier. It was then the heating and air conditioning specialist mentioned to me that it was all because of me constantly burning my incense in the house. What it did was clog up the ductwork of the central heating and air conditioning system causing bad indoor air quality. I had no idea! The heating and cooling specialist said that it was no different than smoking cigarettes in the house. This made me rethink my love for burning incense in the house. As much as I love it, I do not want my indoor air quality to suffer and I do not want to clog up the ductwork or the air ducts of my central heating and air conditioning system because of it. I thanked the certified heating and air conditioning specialist for alerting me to this huge mistake I had been making in my home by burning the incense. I will have to have to find another form of relaxation in my house in order to keep things good. Maybe I will invest in some kind of a fireplace. That would be nice!