A.O. Smith.

The Next Hybrid gas water heater combines tank and tankless water heating technologies to operate at 90% thermal efficiency. The unit performs like a tankless model, but a small buffer tank allows it to overcome some of the negative attributes normally associated with tankless models such as minimum flow rates. To maximize the systems energy efficiency, the exhaust gas from the tankless engine is routed back into the buffer tank to extract additional heat into the water. 866.362.9898. www.hotwater.com.