We have many different size of heat pump for various swimming pool. Our features: 1. Titanium in PVC shell ,anti-Corrosion 2. With branded compressor inside, long lifetime 3. Microcomputer control system,easyoperation. 4. high efficiency with energy saving 5.compactdesign,take less space 6. quiet operation 7. different voltage available, 220V/380V 8. different gas available, R22 or R410a 9. capacity from2.5KW 20KW