HarveyMushman you manage keep the smoke outdoors via that venting method?
Yes it works surprisingly well.
And I have a wife who, whilst extraordinarily tolerant of the buying and selling of grinders, is at the other end of the spectrum when it comes to odours.
I roast in a room that was designed to be a home office space, so inside the house. I just shut the door while roasting and whilstnthere is so e rssidual odour itndossnt linger long.
The extraction fan is a cheapie off ebay.
The aluminium ducting is from an electrical supplies wholesaler (although the local giant hardware store had them too).
The O ring clamps are from the aforementioned hardware store.
The desktop arm holding up the “chimney” was an unused microphone stand.
The chimney itself was a old Tupperware container that my wife is probably still looking for (better to ask for forgiveness than permission).
And the only other ingredient is copious quantities of duct tape.