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2. Door closer - Wikipedia

   en.wikipedia.org/wiki/Door_closer

   A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems. [2]

3. Fire door - Wikipedia

   en.wikipedia.org/wiki/Fire_door

   Door clearances at the door edge of the door frame (Wood Door), on the pull side of the door, do not exceed clearances listed in 4.8.4 (the clearance under the bottom of the door shall be a maximum of 3/4") and 6.3.1 (top & edges 1/8") Metal door (top & edges up to 3/16")

4. Door breaching - Wikipedia

   en.wikipedia.org/wiki/Door_breaching

   Utilizing a breaching tool is unnecessary if the door is unlocked and easy to open. [5] [3] [6] [1] If the door is locked, breachers can attempt to force inward-opening doors with a strong kick. The breacher will aim to hit the door near the locking mechanism, but not kick the doorknob itself as one can easily twist an ankle doing so. [7]

5. Stack effect - Wikipedia

   en.wikipedia.org/wiki/Stack_effect

   The stack effect or chimney effect is the movement of air into and out of buildings through unsealed openings, chimneys, flue-gas stacks, or other purposefully designed openings or containers, resulting from air buoyancy.

6. Sydney Sweeney exposes cruel posts about her bikini photo ...

   www.aol.com/lifestyle/sydney-sweeney-exposes...

   Sydney Sweeney hit back after body shamers piled on one of her Instagram posts, which included videos and photos of her hitting the gym to prepare for her role as boxer Christy Martin.

7. How Nutcrackers Became a Classic Symbol of Christmas

   www.aol.com/nutcrackers-became-classic-symbol...

   There are so many enduring symbols of Christmas: the trimmed tree, stockings hung by the chimney with care, and of course, jolly Ol' Saint Nick.But for Ree Drummond, there's one Christmas ...

8. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   At the furnace, cool air passes into the furnace, usually through an air filter, through the blower, then through the heat exchanger of the furnace, whence it is blown throughout the building. One major advantage of this type of system is that it also enables easy installation of central air conditioning , simply by adding a cooling coil at the ...

9. Why Trump's plan to 'drill, baby, drill' is unlikely to cut ...

   www.aol.com/why-trumps-plan-drill-baby-100820989...

   Trump's plan to 'drill. baby, drill' isn't likely to spark more oil production, lower gasoline prices, and help reverse inflation, analysts say.