... energy-saving, 2. economical, 3. no-pollution. BDKJW air-source heat pump water heater has the advantages of:1. Convinient: 100L of hot ... water in an hour.2. Constant water temperature: Digital intelligent operation.3. Safe: No electric heating pipe is used ... .5. Easy fixing: No position limitation. BDKJW air-source heat pump water heater is widely used for villa, department, building, ...