I had a company pull and clean my furnace, clean both my returns and main supply in the basement, this past summer. Microban was used in varying amounts during this procedure.
I had to have the company come back twice to wipe out both returns, as I continued to get the smell and fumes of the Microban. After the second wiping out it went away.
This past weekend I turned on the heat for the first time. I immediately got an overwhelming smell of the Microban and a little bit of smoke. After running it for awhile it died down, although it took several days to air out the house and I can still smell the chemical in the living room.
The company told me I needed to run the heat for awhile and that it would burn itself out of the furnace and supply. For three days I ran it once each day for about 1.5-2 hrs with the windows open. Now it's cold and I have to start running it, windows closed, all the time. I still have a significant chemical smell coming from the supply, I believe. I spent almost a whole day wiping it out myself and it hasn't seemed to help. It's also seemed to take on an additional heavy metallic odor as well.
Have I not run it long enough? How long does it take for a film of Microban to dissipate? The supply was cleaned two months ago and I got alot of odor when I was going back over it with water. How long can I expect to smell it in the living room when I'm not even running the air?