I came looking for new available greens today and stumbled onto this thread. I read it with interest and am sorry they have abandoned the project. Six weeks ago I moved from roasting for several years on a Behmor to a Huky.. With the B, most all roasts were done outside, whereas with the H, I have been roasting inside the garage next to the garage door opening, venting the smoke and exhaust out and vertically up a 8’ flexible hose, using a better sealed Huky exhaust fan setup. I still feel that I’m still breathing more hazardous VOCs than I had hoped depending on wind. It is a workable situation so far this summer with the door wide open, but I live over 6k ‘ in the CO foothills so winter will necessitate a new approach by exhausting under a partially opened garage door. Consequently I have been searching for a portable flexible hood to somehow vent my work area under the door to the outside, or some type of afterburner/catalyst to neutralize the emissions into less hazardous chemicals for lung health. (Assuming that would be the endpoint goal of any new device, not just eradication of visible smoke)
I might add, my tinfoil hat is safely stashed in the box on the closet shelf, but the concerns with breathing diacetyl and 2,3 pentanedione are well founded, especially with compromised lung health like asthma, COPD etc. Hopefully something that will adapt to the OP and other home roaster’s needs will be developed.