Global Heat Pump Water Heater Market Size study, by Type (Air source and Geothermal), by Rated Capacity (Up to 10 kW, 10?20 kW, 20?30 kW, 30?100 kW, 10-150 kW and Above 150 kW), by Storage Tank Capacity (Up to 500 LT, 500?1,000 LT and Above 1,000 LT) and Regional Forecasts 2020-2027