If you're upgrading to the iPhone 6, iPhone 6 Plus or even from a 4S to an iPhone 5, this guide will help you back up your information and get it ready to restore on your new device. I walk you through using iCloud backup and show you how it all works.Gear I use: http://amzn.to/1nDu5kb. Website: http://www.zollotech.com.f you're upgrading to the iPhone 6, iPhone 6 Plus or even from a 4S to an iPhone 5, this guide will help you back up your information and get it ready to restore on your new device. I walk you through using iCloud backup and show you how it all works. Gear I use: http://amzn.to/1nDu5kb. Website: http://www.zollotech.com.
HFO Refrigerants. HFO (hydrofluoro-olefin) refrigerants are the fourth generation of fluorine-based refrigerants. HFC refrigerants are composed of hydrogen, fluorine and carbon atoms connected by single bonds between the atoms.
History of Freon in HVAC. What is FREON? The refrigerants that were used in mechanical refrigeration in the early days were sulphur dioxide, carbon dioxide, ammonia and methyl chloride. The principle behind mechanical refrigeration is that when a compressed air expands, it absorbs heat from the environment.