Ground Source Heat Pump for cold area 1. -25 DC low temp. use 2.multifunction, cool,heat 3. 4.5 COP, R410a 4. CE approve Ground source heat pumpCooling capacity: 37532BUT/h ~716520BUT/hCOP: 3.9~4.5(even to6)Certification: CE,CCCRefrigerant: 407c, 410a, R221.Wide applicationWidely used in hotels,restaurants,apartment houses, villas, factories and schools, sauna, bathroom, SPA association, beauty ...