Licensed pros. The EPA calls for that anybody who handles or buys refrigerants soon after 2018 be educated and certified. It's got equivalent cooling Attributes as R22, but it doesn't have exactly the same negative effect on the ozone layer. In summary, while R22 and 407C are equally refrigerants, they're https://marcouqizs.shoutmyblog.com/28267971/the-refrigerant-r407c-diaries