As a non-toxic gas, little concern was given to the incidental release of Freon into the air from AC system leaks or from consumers attempting to charge the AC in their 1971 Gremlin. A strange thing was happening while Freon was working hard to cool the inside of our homes; what was outside of our homes was getting hotter every year. Recharging or recovery of refrigerant in the course of servicing air conditioning systems in vehicles can cause R134a to escape. Major repairs can cause accidental damage to the air conditioning system exposing workers to R134a. Accidental perforation of refrigerant containers can occur during use or when moving containers to and from storage. Non-toxic and non-explosive, Freon was hailed as a “miracle.” It made the modernist skyscraper—with its sealed windows and heat-absorbing materials—possible. It made living in the desert However, your air conditioner does make use of some fluids, and when heated, they can smell like exhaust fumes. A smell from an AC such as this most likely means there is a leak in your refrigerant line. A refrigerant is a cooling agent inside your aircon, and a leak can impact the performance of your air conditioning unit. Moreover, it Due to ozone depletion, R-22 refrigerant is being phased out of production to allow for the availability of more sustainable coolant products. DuPont MO99 is a non-toxic hydrofluorocarbon blend with a zero ozone depletion potential (ODP). 2. Replacing R-22 with MO99 refrigerant in your home air conditioning system minimizes component changes A) expansion valve is placed before the evaporator. B) condenser may or may not be air cooled. C) R-717 boiling point at atmospheric pressure is -23.3 degree C. D) evaporator and condenser pressures are critical to the operation. E) the evaporation temperature should be 5C to 10C lower than the cooled medium. Refrigerant Gas R134a Version 2 Revision Date: 20.02.12 Page 2 of 9 1999/45/EC: Most important adverse effect: Rapid evaporation of the liquid may cause frostbite. Vapour is heavier than air and can cause suffocation. 2.2. Label elements Label elements under CHIP: Risk phrases R58: May cause long-term adverse effects in the environment The latest refrigerant designed for HVAC systems Is R-454b. It’s a non-toxic, mildly flammable refrigerant that will have zero effect on the ozone and a lower global warming potential. Several manufacturers have already selected this refrigerant and new equipment with R-454b will be entering the market as of 2023. Ls5tegJ.