We just moved into a new/new to us house. It was built in the 80's and has an indoor laundry room, with the carport converted to a garage. The house is concrete slab. While securing our dryer vent we noticed that we can find no exit/outside vent. Even with the dryer on we see no signs of it venting. You cannot see light from the inside, but you can feel cool air. It is on the outside wall. Any ideas where this thing may be vented?