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A ridge vent is a type of vent installed at the peak of a sloped roof which allows warm, humid air to escape a building's attic. Ridge vents are most common on shingled residential buildings. Ridge vents are also used in industrial warehouses to help release the hot air and help circulate comfortable air inside the building .
Air admittance valves (AAVs, or commonly referred to in the UK as Durgo valves and in the US as Studor vents and Sure-Vent®) are negative-pressure-activated, one-way mechanical valves, used in a plumbing or drainage venting system to eliminate the need for conventional pipe venting and roof penetrations.
An attic fan installed underneath a roof. A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...
Mechanical fans can be used to provide positive pressure ventilation by breaking or removing windows, skylights or heat/smoke vents on the roof; or by cutting new exhaust vents in the building. If there is no suitable existing hole, firefighters may use their equipment to make one, such as specialized saws for cutting a large hole in the roof.
Minor tristanite and a relatively small but thick trachyte flow issued from a vent on the western flank of Ice Peak where it advanced onto the Big Raven Plateau. [38] [121] [151] Breccia and spatter agglutinated around the vent area to create Punch Cone, a roughly 1-kilometre-long (0.62-mile), steep-sided ridge projecting through Mount Edziza's ...
ORP Flaming was a Polish base minesweeper from the Cold War era, one of 12 ships of Projekt 206F [], rebuilt between 2000 and 2001 into a minehunter (Projekt 206FM).The vessel measured 58.2 meters in length, 7.97 meters in width, and had a draft of 2.14 meters, with a full displacement of 470 tons.
The Grand Prix was an all-new model for Pontiac in the 1962 model year as a performance-oriented personal luxury car. [3] Based on the Pontiac Catalina two-door hardtop, Pontiac included unique interior trim with bucket seats and a center console in the front to make the new model a lower-priced entry in the growing personal-luxury segment. [3]
N700 series trains gradually replaced 300, 500 and 700 series sets on Nozomi services, and by the end of February 2009, the N700 series were responsible for 74 Nozomi services per day. [4] All Nozomi through runs (over the full route between Tokyo and Hakata) were scheduled to use the N700 series exclusively by 2009.
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