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2. Heating, ventilation, and air conditioning - Wikipedia

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

   Ventilating or ventilation (the "V" in HVAC) is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. Ventilation removes unpleasant smells and ...

3. List of most-viewed YouTube videos - Wikipedia

   en.wikipedia.org/wiki/List_of_most-viewed...

   By June 2015, only "Baby" had also managed to pass this threshold, but, by October 2015, a total of ten videos had done so, [56] and the number grew further to over 400 in 2024. [57] Older videos that pre-dated the launch of YouTube in 2005 but were added later to pass a billion views are as follow:

4. Carbon dioxide sensor - Wikipedia

   en.wikipedia.org/wiki/Carbon_dioxide_sensor

   CO 2 concentration meter using a nondispersive infrared sensor. NDIR sensors are spectroscopic sensors to detect CO 2 in a gaseous environment by its characteristic absorption. . The key components are an infrared source, a light tube, an interference (wavelength) filter, and an infrared detec

5. Today's Wordle Hint, Answer for #1255 on Monday, November 25 ...

   www.aol.com/todays-wordle-hint-answer-1255...

   Related: 16 Games Like Wordle To Give You Your Word Game Fix More Than Once Every 24 Hours We'll have the answer below this friendly reminder of how to play the game .

6. 1 dead, 6 firefighters injured in 3-alarm apartment building ...

   www.aol.com/news/1-dead-6-firefighters-injured...

   One person was killed and six firefighters were injured after a multi-alarm fire broke out in an apartment building on the Upper East Side of Manhattan on Monday. The fire started around 7:15 p.m ...

7. NHL referee Mitch Dunning communicative, can move extremities ...

   www.aol.com/nhl-referee-mitch-dunning-taken...

   NHL referee Mitch Dunning is fully communicative and can move all his extremities following a violent collision with Colorado defenseman Josh Manson in Monday night's game at Philadelphia. The NHL ...

8. List of most-subscribed YouTube channels - Wikipedia

   en.wikipedia.org/wiki/List_of_most-subscribed...

   American YouTube personality MrBeast is the most-subscribed channel on YouTube, with 336 million subscribers as of December 2024.. A subscriber to a channel on the American video-sharing platform YouTube is a user who has chosen to receive the channel's content by clicking on that channel's "Subscribe" button, and each user's subscription feed consists of videos published by channels to which ...

9. A construction worker who murdered his 76-year-old former ...

   www.aol.com/news/construction-worker-murdered-76...

   A construction worker who murdered his 76-year-old former employer in a frenzied tool attack faces a life sentence in prison for his crimes.. Heber Enoc Diaz, 27, of Pasadena, was convicted as ...