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2. R-410A - Wikipedia

   en.wikipedia.org/wiki/R-410A

   R-410A is a refrigerant used in air conditioning and heat pump applications. It is a zeotropic but near-azeotropic mixture of difluoromethane (CH 2 F 2, called R-32) and pentafluoroethane (CHF 2 CF 3, called R-125). R-410A is sold under the trademarked names AZ-20, EcoFluor R410, Forane 410A, Genetron R410A, Puron, and Suva 410A.

3. List of refrigerants - Wikipedia

   en.wikipedia.org/wiki/List_of_refrigerants

   This is a list of refrigerants, sorted by their ASHRAE-designated numbers, commonly known as R numbers. Many modern refrigerants are human-made halogenated gases, ...

4. Refrigerant - Wikipedia

   en.wikipedia.org/wiki/Refrigerant

   Class 1: This class includes refrigerants that cool by phase change (typically boiling), using the refrigerant's latent heat. Class 2: These refrigerants cool by temperature change or 'sensible heat', the quantity of heat being the specific heat capacity x the temperature change. They are air, calcium chloride brine, sodium chloride brine ...

5. Difluoromethane - Wikipedia

   en.wikipedia.org/wiki/Difluoromethane

   Difluoromethane is thus a relatively low-risk choice among HFC refrigerants, most of which have higher GWP and longer persistence when leaks occur. The common refrigerant R-410A is a zeotropic , 50/50-mass-percent mixture of difluoromethane and pentafluoroethane ( R-125 ).

6. Daughter gifts dad an image composed of daily text messages ...

   www.aol.com/lifestyle/daughter-gifts-dad-image...

   A woman who saved years' worth of daily text messages from her dad turned them into a sentimental Christmas gift that left her dad in tears. Leah Doherty of Ohio told "Good Morning America" that ...

7. The 6 most common headache types — and when to see a doctor

   www.aol.com/6-most-common-headache-types...

   Certain types of headaches may be a sign of a more serious condition, such as a brain tumor or aneurysm, especially if the pain is sudden or severe, according to Cohen. "This highlights the ...