I've got an electric dryer currently vented outside:
Behind the door to the right is our heat pump furnace:
I was thinking about, during the winter, venting the dryer (properly filtered for lint) into the furnace return (which would then be filtered again by the furnace filter) instead of outside.
My thinking is that it will act somewhat as a humidifier (the house is very dry in the winter) as well as conserving a bit (not much) of heat from the dryer output.
Can this setup work? What dangers would I need to address? And of course will I actually be doing any good at all?