i have a good friend that hatches a lot of eggs. He has has pnuemonia 3 times in the last year. They are blaming in on the bators. It sort of makes sense. Stop and think about all the bacteria that are involved with a chicken egg and the temps that you cook it. It is heaven for bacteria in a bator. You stand right over it and open the door and woosh all that comes to your face and into your lungs. Maybe they should have a posting that says "Warning You should wear a respirator when operating this machine" Has anyone ever heard of this sort of thing? They also went on to tell how bad of an idea it was to have them in your home especially if you have any sort of breatheing problems already, like asthma. What are your thoughts?