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2. 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]

3. Crankcase ventilation system - Wikipedia

   en.wikipedia.org/wiki/Crankcase_ventilation_system

   Another type used of the pressure suction type was used on VW Porsche air cooled engines whereby the front crankcase pulley has a reverse screw built into it which brings air into the engine and air escapes the crankcase with the road draft tube. This system works very well in getting rid of crankcase vapors which are harmful to the engine.

4. R-407C - Wikipedia

   en.wikipedia.org/wiki/R-407C

   Commercial Air Conditioning: Suited for larger commercial spaces, including offices and retail locations. Industrial Refrigeration: Used in industrial processes requiring precise temperature control. Transport Refrigeration: Essential for maintaining temperatures in refrigerated transport systems.

5. Head gasket - Wikipedia

   en.wikipedia.org/wiki/Head_gasket

   Combustion gases (unburned air/fuel mixture and exhaust gases) in each cylinder; Water-based coolant in the coolant passages; Lubricating oil in the oil galleries; Correct operation of the engine requires that each of these circuits do not leak or lose pressure at the junction of the engine block and the cylinder head. The head gasket is the ...

6. 1,1-Difluoroethane - Wikipedia

   en.wikipedia.org/wiki/1,1-Difluoroethane

   1,1-Difluoroethane, or DFE, is an organofluorine compound with the chemical formula C 2 H 4 F 2.This colorless gas is used as a refrigerant, where it is often listed as R-152a (refrigerant-152a) or HFC-152a (hydrofluorocarbon-152a).

7. Carbon tetrachloride - Wikipedia

   en.wikipedia.org/wiki/Carbon_tetrachloride

   Carbon tetrachloride was the first chlorinated solvent to be used in dry-cleaning and was used until the 1950s. [46] It had the downsides of being corrosive to the dry-cleaning equipment and causing illness among dry-cleaning operators, and was replaced by trichloroethylene, tetrachloroethylene [46] and methyl chloroform (trichloroethane). [47]

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. Chlorofluorocarbon - Wikipedia

   en.wikipedia.org/wiki/Chlorofluorocarbon

   Chlorofluorocarbons (CFCs) are anthropogenic compounds that have been released into the atmosphere since the 1930s in various applications such as in air-conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans, and as solvents. [68]