Heat exchangers

A heat exchanger is the core thermal component of a boiler or water heater. It sits between the burner flame or flue gases and the water circuit, transferring combustion heat into the heating or domestic hot-water system while keeping the two media separated. Plate, shell, and coil designs are all represented here, covering both primary and secondary circuits.

Choosing the correct heat exchanger depends on thermal output rating, connection sizes and thread type, flow and return port spacing, and whether the unit is a single-wall or double-wall design. Always check the manufacturer's part number or the appliance model designation first. If you hold a reference from another supplier, our cross-reference lookup will match it to the correct replacement in this section.