With its stainless steel exterior casing and commercial grade components, the Noritz ASME certified tankless hot water heaters are specifically designed to meet the demands of commercial applications. For heavy-duty industrial use, up to 24 ASME certified tankless models can be linked together with a single system controller, supplying a maximum of 316.8 GPM at 9.1 million BTUs (with NC380-SV-ASME model). The copper piping in the unit’s heat exchanger is 25% thicker, providing extra durability to help prevent condensation and combat product failure.