Residential buildings which have shower panels installed in bathrooms have a pressure pump installed on terrace in order to boost forced flow of hot and cold water in bathrooms.
These type of buildings require pressurized solar water heating systems with Flat Plate Copper Collectors ranging from capacity of 300 Litres Per Day to more providing hot water with forced flow in bathrooms.
Below is example of 500 LPD solar water heater pressurized system with 4 no. of copper collectors.