Characterized with higher efficiency for space heating, cooling and sanitary hot water supply, HEEALARX A+++ R290 commercial inverter heating heat pumps can be used in wide variety of commercial applications such as: hotels, hospitals, corporate events, restaurants, sporting events, large-scale constructions, commercial shopping malls, and manufacturing plants, and so forth. With terms of 3 years warranty on the whole units and also 8 years warranty on the compressors can set your ease on mind.