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Navien’s NPE-2 condensing tankless water heaters include a turndown ratio up to 15:1, advanced EZNav multi-line control panel with Setup Wizard, and 2” PVC venting up to 75’. The NPE-2 continues to offer dual stainless-steel heat exchangers, half-inch gas pipe capability up to 24’ and patented ComfortFlow recirculation system with built-in pump and buffer tank (NPE-A2).

With the improved SENSEI RSC Condensing Tankless Water Heater, Rinnai delivers the same superior quality with simplified installation, the company says. Featuring Smart-Circ Intelligent Recirculation, external controllers are not required to set up recirculation. Instead, Smart-Circ “learns” users’ hot water patterns over a seven-day period, then schedules recirculation patterns accordingly.

Rheem Commercial Tankless Water Heaters are designed to deliver continuous, dependable hot water, save money and space, and keep business up and running workday after workday, the company says. No matter the scope or redundancy needs of your customer’s business, manifold capabilities in available models can easily connect up to 20 units.

A. O. Smith has combined its water heating and water treatment expertise to achieve unparalleled protection with its new X3 Scale Prevention Technology — now included on its suite of condensing gas tankless products, the company says. This innovative technology prevents scale buildup in a unit, eliminating the need for descaling maintenance and tripling the expected lifetime of a unit.

The ARMOR Condensing Water Heater line is available in 10 models, ranging from 399,000 to 4 million Btu/h. These models are constructed with superior grade 316L Stainless Steel, which reduces heat loss and provides up to 99% thermal efficiency and reliability for large commercial applications, the company says.