Noritz America introduces the N-0751M-DVC, a new tankless water heater aimed at combining the advancements and power of the 751 Series with the convenience of concentric venting available mid 2008. This new concentric vented heater enhances the capabilities of customers to deliver endless hot water in air constrained areas with simple, single penetration installation. This indoor unit provides up to 9.8 gallons of hot water per minute, ideal for homes with up to four showers. The concentric venting allows this heater to be installed in small spaces with limited air flow and requires zero venting clearance. The N-0751M-DVC also utilizes a re-engineered heat exchanger which increases its thermal efficiency. The heater's next generation dual flame burner gives this unit stable combustion over a wider range of water flow. This means that the N-0751M-DVC is capable of boosting output at higher flow rates, while at the same time reducing the unit's minimum required flow rate.