HVAC units are meant to use just one type of refrigerant. Incorporating the wrong type of refrigerant can permanently destruction the system. The can can get quite chilly. Shake the can just about every 10 seconds to ensure the fuel flows very well. Usually do not keep the can upside-down. https://andressocpq.blogripley.com/38120200/3-series-adaptive-cruise-control-fundamentals-explained