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2. These Tried-and-Tested Neck Fans Will Keep You Cool All Summer

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   This portable neck air conditioner/neck fan boasts 78 total air outlets with three fan speeds for serious airflow. Our test panel found that the airflow and cooling effect were better than most in ...

3. Editors Say These Neck Fans Kept Them Cool During the Hottest ...

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   Portable Neck Fan. Civpower’s Portable Neck Fan is one of the best-reviewed and best-selling models on Amazon. The simple design features 78 air outlets and three selectable fan settings so you ...

4. Amazon Shoppers Swear This Neck Fan Is ‘a Lifesaver ... - AOL

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   This portable Amazon neck fan is perfect for hot flashes and summer heat, and it has over 8,000 five-star reviews. Take 40% off this summer must-have right now.

5. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]

6. This Bestselling Portable Neck Fan Makes 'a Real Difference ...

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7. 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.