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  2. 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 from water leaving the system can slow flow (resulting in clogs) or cause a siphon 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.

  3. AMC Pacer - Wikipedia

    en.wikipedia.org/wiki/AMC_Pacer

    American Motors' chief stylist Dick Teague began work on the Pacer in 1971, anticipating an increase in demand for smaller vehicles throughout the decade. The new car was designed to offer the interior room and feel of a big vehicle that drivers of traditional domestic automobiles were accustomed to, but in a much smaller, aerodynamic, and purposefully distinctive exterior package. [13]

  4. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    The ventilation system of a regular earthship Dogtrot houses are designed to maximise natural ventilation. A roof turbine ventilator, colloquially known as a 'Whirly Bird' is an application of wind driven ventilation.

  5. Direct vent fireplace - Wikipedia

    en.wikipedia.org/wiki/Direct_vent_fireplace

    The flue system is composed of two flues, the inner flue and the outer flue. The outer flue draws air into the bottom of the sealed firebox to allow for combustion. The inner flue draws hot exhaust gasses from the top of the sealed firebox and vents them directly to the outside of the structure through either an adjacent wall or roof.

  6. Switzerland plans revamp of Cold War-era nuclear bunker network

    www.aol.com/news/switzerland-plans-revamp-cold...

    An air vent wedged between plant pots and a stone ornament was deemed fit, but an escape tunnel full of cobwebs led to a deep manhole with no ladder. "This shelter is not usable in the current ...

  7. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    PCV valve on Ford Taunus V4 engine (feeding from left side valve cover into the inlet manifold) A crankcase ventilation system (CVS) removes unwanted gases from the crankcase of an internal combustion engine. The system usually consists of a tube, a one-way valve and a vacuum source (such as the inlet manifold).

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