Patent ID: 11859865
Assignee: RINNAI AMERICA CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A hot water heating system, the system comprising:
a spine defining a top surface and including:
two or more coupling areas for coupling a water heating unit to the spine, each of the coupling areas including a cold water manifold outlet, a hot water manifold inlet, and a fuel manifold outlet,
a cold water manifold comprising a cold water manifold inlet extending through the top surface of the spine and fluidically coupled to the cold water manifold outlet of each coupling area,
a hot water manifold comprising a hot water manifold outlet extending through the top surface of the spine and fluidically coupled to the hot water manifold inlet of each coupling area, and
a fuel manifold comprising a fuel manifold inlet in communication with the fuel manifold outlet of each coupling area,
wherein at least one of the coupling areas is located above another coupling area when the spine is oriented with the top surface facing upwardly; and

two or more water heating units, wherein each of the water heating units is coupled to one of the coupling areas.