After few year iam doing ac jobs in saudi.not maintaince work just fittings only.it is simple unit.i can do this job really enjoyable and fastly.feautres of carrier units is well . Fitting drainage pipe very simply and Braz nut of indoor good quality, indoor designing really a standard method.heavy qualified compressor and capacitors.i am fitted carrier units above 50, s.iam proud it.big customer value of carrier ac in saudhi.saudhi citizen ask(hadha kois)it really good.its unit low price.