Model BS15-025S-f BS15-033S-f BS15-038S-f BS15-045S-f BS15-051S-f BS35-051S-f Heating capacity kw 10.4 13.1 14.8 18.1 21 25.5 COP w/w 5.8 5.4 5.5 5.6 5.6 5.4 Operating range-Air ℃ -7~43℃ Water flow volume m³/h 4-5 4-6 4.5-6 5.3-8 6-9 7.5-11 Input Power heating w 1790 2420 2690 3230 3750 4720 Running current heating A 8.6 11.2 12.5 15.4 17.5 7.5*3 Max current heating A 11.5 15.5 16.8 20.8 23.5 10 Heat exchanger Titanium in PVC Compressor Rotary Rotary Rotary Scorll Scorll Scorll compressor qty 1 1 1 1 1 1 Fan direction Horizontal Noise level dB(A) 50 50 50 60 60 60 Water connection mm 50/48.3 Gross weight kg 66 82 89 119 122 124 Net dimensions（L*W*H） mm 920*390*630 980*400*720 980*400*720 1080*490*810 1080*490*810 1080*490*810 Packing dimensions（L*W*H） mm 970*450*780 1035*450*880 1035*450*880 1130*545*970 1130*545*970 1130*545*970 Power supply V/Ph/Hz 208-230/1/50 380-415/3/50 Measuring condition A26W26（华氏A80W80，80%） FAQ 1.Whether the heat pump unit can operate normally in winter with low temperature? Yes. Air source heat pump unit has intelligent defrosting function to ensure stable operation of the unit in low temperature environment. It can automatically enter and exit defrosting according to multiple parameters such as outdoor environment temperature, evaporator fin temperature and unit operation time. 2.Do you think swimming pool heat pump only used for swimming pool? No，it can also be used for Hot Spring，Fishing Farm，Jacuzzi Spa and so on. 3.Can your pool heat pump be connected to PV system? The heat pump is powered by PV system. As long as the PV system can meet the maximum power consumption of heat pump, it is feasible.