HVAC Units are created to use only one type of refrigerant. Introducing the wrong type of refrigerant can forever destruction the system. Existing Assignee (The listed assignees can be inaccurate. Google hasn't carried out a legal Examination and makes no illustration or guarantee as to the precision of the record.) https://3-series-air-conditioning33214.wikipublicist.com/5583387/the_2_minute_rule_for_3_series_specifications