The EnviroVent 2 has the capability of venting 2 large kilns (up to 12 cu/ft chambers) if you purchase the optional Dual Exhaust Kit. The kit is easy to install and comes with everything you need.
It includes the ducting Y, the additional ducting and the collection cup. It also necessary to purchase this kit if you are venting a kiln over 12 Cu/Ft like the KM1627-3 PK because of the need to extract more fumes