Air water heat pump especially for low temperatures, COP 4.4 work reliable till -25 degree,high capacity, EN14511 standards 1. Air to water heat pump on R404A gas designed and testedin accordance with Europeen standard EN14511.2. High efficiency. Able to work reliably and efficiently till minus 25 deg C. 3. Uses Copeland scroll compressor, Alco thermal expansion valve and 316 stainless steel ...