I have a 2 story house and I wanted to add a toilet and sink to the main floor. There is currently no venting to this location, and I wanted to know if it's possible to add a vent directly through the outside wall. There are no other windows or doors on this end of the house.Is it possible to do this without adding a vertical vent all the way up the side of the house and through the roof? I didn't want to have to have to run a vent up through both floors on the inside of the house.
Thanks

In recent years Ohio has made this legal as long as you go out the wall as high as possible and there are no windows, doors,bathroom fans or dryer vents above it.You may run it straight out the wall or run it veritcal once you are outside and up the side of the house. I would check the codes where you are located, many states may not allow this.

Europe has used this type of venting because so many of the homes are stone or solid masonry. However, every one I have seen has been vented through the eave and about 1 ft above the roof surface. Not pretty but commonly seen. PVC piping is light and easy to run.

Agree with all answers, you can usually go through the wall but you must terminate above the roof line. State and local codes will make this call so check with your building dept.

My code (Standard Plumbing Code) allows terminating a vent on a outside wall with these restrictions. You may not terminate a vent within 10 feet horizontally and 2 feet above of any opening such as a door, window or AC inlet. Good luck, Tom

If your local Code allows, use Air Admittance Vent (AAV) vent and you don't have to go through any exterior wall at all. It is clean, easy, and inexpensive substitution to a vent that terminates above the roof. Hope that helps. Milo