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  2. Stack interchange - Wikipedia

    en.wikipedia.org/wiki/Stack_interchange

    Two busy roads intersect at the junction. A four-level stack interchange was chosen to serve the high volumes of traffic. The Mount Edgecombe Interchange is another four-level stack interchange just outside Durban, South Africa, and is the intersection between the N2 (to Durban and KwaDukuza) and the M41 (to Mount Edgecombe and uMhlanga). The ...

  3. Drain-waste-vent system - Wikipedia

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

    A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

  4. Heating, ventilation, and air conditioning - Wikipedia

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

    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. The wires connecting to the blue terminal block on the upper-right of the board lead to the thermostat. The fan enclosure is directly behind the board, and the filters can be seen

  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. Talk:Stack interchange - Wikipedia

    en.wikipedia.org/wiki/Talk:Stack_interchange

    Similar reason why the Highway 401-403-410 interchange is mentioned as well as it would have been a full stack had there been a semi-directional ramp instead of the NE quadrant loop ramp. As per above, we can also mention why the Turcot Interchange is not a proper stack interchange although frequently described as one.

  7. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A small terminal unit that is often composed of only a blower and a heating and/or cooling coil, as is often used in hotels, condominiums, or apartments. Abbreviated FCU. flow A transfer of fluid volume per unit time. fresh air fan Abbreviated FAF. fresh air fraction

  8. List of road interchanges in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_road_interchanges...

    The first stack interchange in the world was the Four Level Interchange (renamed the Bill Keene Memorial Interchange), built in Los Angeles, California, and completed in 1949, at the junction of U.S. Route 101 and State Route 110. [3]

  9. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    The supply pipe supplies either cold or hot water to the unit depending on the time of year. Four-pipe fan coil units have two supply pipes and two return pipes. This allows either hot or cold water to enter the unit at any given time. Since it is often necessary to heat and cool different areas of a building at the same time, due to ...