Is it OK to vent a portable air condition through a furnace cold air duct? The way my windows open, it is impossible to vent my portable air conditioner through them. I don't know where else I can vent it. My latest thought is through a cold air duct to the furnace. What do you think?
Hope someone can give me some advice.
Thank yo.
Rosanne

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Nope. You'll just be venting the extracted heat back indoors somewhere else.