Yes, I’m sensitive too. There may not be a scent but there are other ingredients that coat the clothes to lessen wrinkles. Venting up and above is best, so that air will move away and not be wafted back, depending on the wind direction.There's almost nowhere to put that coop without putting it on a concrete oven.
The house I'm in is old and the laundry room is a addition.
My Mom rigged this up but I think she may be out getting more.
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We have a "natural" dryer scent ball thing in there. I think I may be slightly allergic to it. But I am definitely allergic to the "free and clear" dryer sheets my Nana insists on using. I tried to read the ingredients but my eyes and nose reacted so fast to whatever on earth is in there that I could hardly read them.