Venting a Dryer / Washer and Dryer Combos

Hello

We are in a row house and the dryer has never been vented properly. I’ve got two questions:
1) What kind of person would we call to vent our dryer properly? A gas dryer. This means boring a hole in the wall to the outside. A plumber? I have no idea. How much would this cost?

2) Does anyone have experience with the ventless washer/dryer combos? What kind do you have and what has your experience been?

Thank you.

By Licoln1922 |