said by mityfowl:Vent stacks or side stacks really don't matter. Run two. Why take a chance with your family?
If done correctly you'll never have to deal with a leak.
Ya ya I will run two if I go forward with the project of two dryers. I will start with just one dryer and see if it suffices. However I like to keep my options open and have the information ready on hand when/if I exercise the option.
Adding a second dryer will be a major investment on another matter where I'd have to finally give in and upgrade to a 200A service.
With my 100A service, I'd only have 15A to spare if my two dryers (50A) and oven/stove (35A) run simultaenously at full capacity.
In a simple matter of timing, where all units are drawing their max amps + starting the central vac or a power tool, one of the two service 100A fuses would pop. (And that's in winter, in summer I'd have to decomission a dryer because of the AC).
Not that I'd upgrade to 200A just for the second dryer. It would be a tipping point to justify the upgrade.