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2. Chimney - Wikipedia

   en.wikipedia.org/wiki/Chimney

   Class B are uninsulated double wall pipes often called B-vent, and are only used to vent non-condensing gas appliances. ... where A t =7.1 inch 2 is the minimum ...

3. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.

4. 10 Walmart deals you won't want to wait on — shop ... - AOL

   www.aol.com/lifestyle/10-walmart-deals-you-wont...

   It includes an 8-inch chef knife, an 8-inch bread knife, a 7-inch santoku knife, ... There are also airy side vents for supreme comfort and ease, making it a great option to wear with jeans ...

5. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...

6. You can find huge savings in Amazon's secret overstock ... - AOL

   www.aol.com/lifestyle/you-can-find-huge-savings...

   All you need to do is apply the included adhesive to stick 'em on the wall. Act fast to save over 70%. ... an 8-inch serrated bread knife, a 7-inch santoku knife, a 6.5-inch utility knife, a 3.5 ...

7. Register (air and heating) - Wikipedia

   en.wikipedia.org/wiki/Register_(air_and_heating)

   An unlouvered wall register, which allows circulation of air from one floor to another. Registers vary in size with the heating and cooling requirements of the room. [ 5 ] If a register is too small, the HVAC system will need to push air through the ducts at a faster rate in order to achieve the desired heating or cooling.