Dry Venting 1 Bathroom First Floor 2 Bathrooms Second Floor

If the new bathroom is on the second floor the bathroom s main drain will have to travel through the wall on the first floor and down to the basement or crawlspace.

Dry venting 1 bathroom first floor 2 bathrooms second floor.

The vent that services a fixture must have a diameter at least half as large as the drain pipe but the minimum pipe diameter allowable is 1 1 4 inches. But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms. My bathroom is on the first floor with a finished bedroom directly above and an unfinished basement directly below. If a drain line is nearby you may choose to run a pipe to it rather than running a new line.

Bathroom fans also called exhaust fans prevent moisture damage and mold by forcing air through a duct to the outside of a building. This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo. It s common to use a 1 1 2 inch vent for a. The air removed by every mechanical exhaust system shall be discharged to the outdoors.

Once the new plumbing is in place you can add fixtures and furniture to complete the room. Setting the plumbing for a new bathroom requires you to connect supply water pipes and drainpipes to existing systems. It would appear to be easier to install a wall or floor fan and direct exhaust down and then out through basement wall just above ground. Add value and convenience to any home by installing a new bathroom on an upper floor.

Irc section m1501 1 outdoor discharge. How to vent a 1st floor bath. In single story homes the duct. You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it.

I have read that moist air naturally rises so it is easier to vent up. Adding a bathroom to the second floor of your house.