For more than 50 years, Noritz has been the world's #1 manufacturer of tankless technology. Noritz has the only true commercial tankless water heater. Noritz commercial tankless water heaters are the only tankless water heaters accredited by ASME, with the National Board, and certified in accordance with the H, HLW, and NB stamps, a first in the tankless water heater category. All Noritz tankless water heaters are certified by NSF for commercial applications. Noritz has everything needed for most hot water applications, including a full line of commercial and residential tankless heaters (with the industry's highest capacity model), and a complete line of stainless steel venting and service valves. Visit — Noritz America Corporation