Patent ID: 7044398

Claim:
An integrated fixture for hydronic heating systems, for transferring heat from a higher-temperature loop to a lower-temperature loop, the fixture comprising: a casting; higher-temperature supply and return ports formed in a first portion of the casting; lower-temperature supply and return ports formed in a second portion of the casting; a higher-temperature loop pump volute formed in the first portion of the casting and configured to accept an impeller of a higher-temperature loop pump; a lower-temperature loop pump volute formed in the second portion of the casting and configured to accept an impeller of a lower-temperature loop pump; and a heat exchanger in fluid communication with both the higher-temperature loop and the lower-temperature loop; wherein liquid from the higher-temperature loop enters the integrated fixture through the higher-temperature supply port, passes through a first side of the heat exchanger, and leaves the integrated fixture through the higher-temperature return port, and wherein liquid circulating in the lower-temperature loop enters the integrated fixture through the lower-temperature return port, passes through a second side of the heat exchanger, receiving heat from the water in the higher-temperature loop, and leaves the integrated fixture through the lower-temperature supply port.