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2. 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 ...

3. 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.

4. Central vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Central_vacuum_cleaner

   Installing piping and wiring for a central vacuum in new construction is much easier if done before the drywall and other wall finishes. The short-term cost savings of deferring full system completion should be weighed against the great convenience of having a functional vacuum system, especially during the commissioning and move-in period ...

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.

6. Passive ventilation - Wikipedia

   en.wikipedia.org/wiki/Passive_ventilation

   External elements (walls, screens) Urban planning conditions; The following design guidelines are selected from the Whole Building Design Guide, a program of the National Institute of Building Sciences: [4] Maximize wind-induced ventilation by siting the ridge of a building perpendicular to the summer winds

7. You'll be 'amazed at the amount of stuff' this dryer vent ...

   www.aol.com/lifestyle/drying-times-much-shorter...

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