Tankless Water Heater & Steam Boiler Coils

Tankless boiler coils provide an efficient, space-saving method for producing domestic hot water directly from a steam or hot water boiler. Installed inside the boiler, these finned copper coils act as heat exchangers—transferring heat from the boiler water to cold water flowing through the coil, delivering hot water on demand. 

Because water is heated only when needed, tankless coils eliminate standby heat loss associated with traditional storage tanks. This makes them especially effective in colder climates where boilers operate frequently for space heating. 

These coils are commonly used in oil- and gas-fired boiler systems and are available for a wide range of boiler makes and models. Proper sizing and compatibility are important to ensure adequate hot water output, as performance depends on boiler temperature and system demand.

Tankless coils are a practical solution for applications where space is limited or where a dedicated water heater is not required. They are also well-suited for retrofit situations, allowing replacement of existing coils without major system modifications.

Routine maintenance—such as cleaning or descaling—is recommended to prevent mineral buildup and maintain heat transfer efficiency over time. When properly maintained, tankless coils offer reliable, on-demand hot water with a simple and durable design.