After a couple of very successful cuppings with Daniel Humphries and Willem Boot, we got a lot of interest in our low-energy air cleaning system which utilizes a micro-misting spray tank and an electrostatic precipitator/ionizing air cleaner. While most afterburner/thermal oxidizer systems use 5 to 10 times the natural gas that the roaster itself uses, our system uses about a 5 gallon bucket of water a day and the electricity of 4 lightbulbs while running. Here are a couple of videos, one taken by Daniel Humphries on an impromptu tour I gave, as well as a classic educational video on how electrostatic precipitators work.

VIDEO:"the flame-less afterburner"

VIDEO:"Precipitron electronic air cleaner 1943"