Why does R-134 not cool as good in old systems? 작성자 Elisa 작성일 24-08-31 15:19 | 조회 10 | 댓글 0 본문 Because older A/C systems were designed to use R-12 coolant and {รับผลิตอาหารเสริม} they do not run as efficiently using R-134.Manufacture of R-12 was banned in the US due to concerns over it's adverse effects on the ozone layer. 이전글다음글 댓글목록 0 등록된 댓글이 없습니다. 수정 삭제 목록 글쓰기