Developed over the eighties, this tactic faced problems Together with the refrigerant and oil management technique, Specially after the ban of CFC refrigerants in 1989 and DX devices now are infrequently made use of.[citation desired] Bir ?s? e?anjörü daha sonra yüksek s?cakl??? ?s?tma devresine aktar?r. Bu, ?s?tma yüzeyleri arac?l???yla ya?am