When it comes to quality, Noritz takes no short cuts in producing the highest quality tankless water heaters. Unlike other manufacturers, we do not outsource the main components of our heaters. We manufacture nearly 100% of the parts that go into our heaters. We even make the heat exchanger's copper tubing from raw copper. This allows Noritz to have the highest quality control of all the heater’s parts and components. The high level of quality is an attribute of Just-In-Time (JIT) Production system. Noritz is the only tankless manufacturer to implement the JIT Production system. This system was invented by Toyota and only one company per industry is granted permission to use this super-efficient, quality control production system in Japan. How efficient is this manufacturing system? We can build and ship out heaters in the afternoon from orders that were processed in the morning.