I have two dryers (one gas, one electric) and their exhaust pipes are merged with a "Y" to a common exterior exhaust. I'd like to keep it that way to minimize cuts through the wall (and eventually I may get rid of the old electric dryer).
The new gas dryer is 15 feet away from the wall, the old one is close to it (and to the "Y").
Question: there's a bit of back draft when the gas dryer is working. I can smell it when I'm around that old electric dryer. Can I install some sort of backdraft preventer? Is there such a thing?