The HSBC 300 Integral is a single appliance, all-in-one solution for WPL installation, suitable for both new construction or system modernization in existing structures. It comprises the DHW tank, buffer tank, and all piping and pumps necessary for WPL operation. Though the WPL can be used with other tanks, using the HSBC simplifies installation and frees up valuable floor space, saving almost half the space required if separate tanks were used. Connection between the WPL and the HSBC is hydraulic using a glycol solution, not refrigerant. The WPM heat manager controller for the WPL system is conveniently housed in the HSBC. Highly programmable, the WPM comes pre-programmed with factory-set default parameters for a quick initial start-up.