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2. Heating, ventilation, and air conditioning - Wikipedia

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

   Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate. An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For ...

3. Here's how you can watch that camper sink into the Ohio ... - AOL

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   For premium support please call: 800-290-4726 more ways to reach us

4. Blue Hole (Castalia) - Wikipedia

   en.wikipedia.org/wiki/Blue_Hole_(Castalia)

   Entrance to Blue Hole. The Blue Hole is a fresh water pond and cenote located in Castalia, Erie County, Ohio, in the United States.From the 1920s to 1990 the Blue Hole was a tourist site, attracting 165,000 visitors annually at the height of its popularity, partly because of its location on State Route 269, about 7 miles (11 km) southwest of the Cedar Point amusement park in Sandusky, Ohio.

5. Sinks of Gandy - Wikipedia

   en.wikipedia.org/wiki/Sinks_of_Gandy

   The Sinks are a natural tunnel accommodating Gandy Creek, a tributary of Dry Fork, for about 3,000 feet (910 meters) as it passes under a spur of Yokum Knob to reemerge on the opposite side of Randolph County Route 40 (Dry Fork Road). The southern (upstream) entrance to the Sinks, about 30 feet (9.1 m) wide and 15 feet (4.6 m) high, is in a low ...

6. Play Just Words Online for Free - AOL.com

   www.aol.com/games/play/masque-publishing/just-words

   Just Words. If you love Scrabble, you'll love the wonderful word game fun of Just Words. Play Just Words free online! By Masque Publishing. Advertisement. Advertisement. Feedback. Help. Join AOL.

7. AOL Mail

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8. List of locks and dams of the Ohio River - Wikipedia

   en.wikipedia.org/wiki/List_of_locks_and_dams_of...

   The Act allowed the production of a system of locks and dams along the Ohio. In 1929, the canalization project on the Ohio River was finished. The project produced 51 wooden wicket dams and 600 foot by 110 foot lock chambers along the length of the river. During the 1940s, a shift from steam propelled to diesel powered towboats allowed for tows ...

9. Is your family eating rocket fuel? Consumer Reports study ...

   www.aol.com/family-eating-rocket-fuel-consumer...

   Perchlorate, a chemical found in rocket fuel, has contaminated water and food and is more likely to be found in food given to babies and children, a study from Consumer Reports found. The chemical ...