Model BS15-013S-d BS15-016S-d BS15-020S-d BS15-025S-d BS15-030S-d Heating capacity KW 4.6 6.7 9.0 10.8 13.7 BTU 15700 22800 30700 36800 47000 COP 6.2 6.5 6.4 6.5 6.6 Operating range-Air ° C -7~43 Advised water flow M³/H 4~4.5 4~6 6~9 7.5~11 10~14 Rate input Power W 740 1030 1400 1660 2080 Running current heating A 3.5 4.9 6.8 7.7 10.2 Max current heating A 5 6.7 8.7 10.2 16.0 Heat exchanger Titanium in PVC Compressor Rotary Fan direction Horizontal Sound level d B(A) 50 Water connections mm 50/48.3 Gross weight Kg 47 51 67 71 80 Qty per 20'ft/40'ft 93/198 93/198 93/198 93/198 93/198 Power supply V/Ph/Hz 230/1/50 FAQ 1.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. 2.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. 3.If there is any problems of the heat pump in the future, how to fix it? We do have unique bar code number for each unit. In case heat pump has any problems, you can describe more details to us together with the bar code number. Then we can trace the record and our technician colleagues will discuss how to solve the problem and update to  you.