low noise heating pump for school

Low noise commercial heating pump High COP commercial heating pump Function: 1, Heating pump mode 2,Compressor over current protection function 3, Automatically remember all parameters if power off 4, Display water tank temp, preset temp and inquiry function 5,Turn on/off at two certain period of time within 24 hours. 6,Compressors run in balance and starts are staggered. 7,Electric heating back up. 8,Automatically and forced defrosting function 9,Huge LCD display (with blue