common vent การใช้

• To allow only one vent stack, and thus one roof penetration as permitted by local building code, sub-vents may be tied together inside the building and exit via a common vent stack.
• The preferred / common vent material for most condensing boilers available in North America is PVC, followed by ABS and CPVC . Polymer venting allows for the added benefit of flexibility of installation location including sidewall venting saving unnecessary penetrations of the roof.
• Frustrated with research on Louisiana alligators saying males could be told from females only by measuring scale patterns near the cloaca, the common vent used for elimination and reproduction, he had some adult alligators pulled from a pool, flipped over and soothed by tummy-rubbing, and then went exploring.