They do nothing at all to reduce moisture carried odors (either from roasting or cooking). My nose likes the feedback this gives while I'm roasting or cooking, but it's a lot less happy an hour two afterwards, when the odors refuse to leave.
jbaldassari wrote: I live in a small condo, and I've been using a popcorn popper on my balcony, but it does produce a good amount of smoke after second crack starts. When it gets colder out I would love to be able to continue roasting indoors,
I don't want to set off my smoke (and carbon monoxide) detectors or those of my neighbors. I wonder if one of the small home roasters like iRoast2 would be ok if operated next to an open window, maybe with a small fan blowing toward the window? Is the Nesco roaster really that bad?

jbaldassari wrote:Does anyone know why the Gene Cafe manual says "Do not use outdoors" under Important Safeguards? I found the manual here: http://www.genecafe.com/en/db/index.html?table=download&query=view&l=1&p=&go=1