Phase out dates for HCFC R22 coolant were set according to EU regulations in 2002. Although the coolant has only a moderate Global Warming Potential (GWP) and Ozone Level Depletion Potential (ODP), the EU, set on a strict course of environmentalism, has set down laws to replace it with those that have zero Ozone Level Depletion Potential. The UK is replacing R22 with R417A, which is also up to 50% more energy efficient than the older coolant. Yet these stringent regulations should not cause major concern for people who own a portable air conditioner. Unlike car air conditioners, portable air conditioners don’t have to have their coolant refilled. The only time when more coolant would be necessary is if the air conditioner leaks or needs a major repair.