IRVINE, Calif. — Navien has started shipping the new NHW-A non-condensing tankless water heater.

The NHW-A is available in two configurations: NHW-AI for interior installations and NHW-AE for exterior installations, according to a press release from Navien. Both the NHW-AI and NHW-AE are offered in 160,000 Btuh, 180,000 Btuh, and 199,900 Btuh sizes with either natural gas or liquid propane fuel operation.

The NHW-A is the first and only non-condensing tankless water heater to feature the patented ComfortFlow recirculation pump and buffer tank, which were originally introduced in 2012. ComfortFlow helps eliminate the “cold water sandwich” effect and resolves the issue of low flow rates found in other tankless water heaters, Navien said. ComfortFlow also reduces the wait time for hot water by allowing internal or external recirculation without the need for externalH parts or controls. Users can program recirculation timing for “always on,” set a weekly schedule using the remote controller, or use the intelligent setting that learns the user’s hot water patterns and automatically adjusts the recirculation schedule to match.

“NHW-A with ComfortFlow brings high-efficiency water heating with built-in recirculation to more customers,” said Chia Lin, water heater product manager at Navien. “In the past, customers who were restricted to non-condensing products had to purchase expensive external pumps along with their tankless water heaters to achieve what the NHW-A now offers already built into the unit.”

The NHW-A utilizes the proprietary NaviTech stainless steel heat exchanger and burner for extreme durability and low NOx emissions.