We are in the throes of remodel which require moving my laundry room. Currently, the clothes dryer is near an outside wall and vented directly outside. However, we are moving the W/D to an existing bathroom with no outside walls. It will require venting a long, long distance and we are trying to figure out the best way. My DH would like to vent up through the attic. We have seen something on a TV show where there was a trap above the dryer with a metal box you cleaned out which allowed venting up. We know we need the shortest distance and the least turns. Any suggestions?