Navien has added a  new 120,000 BTU/h model to the NPN non-condensing tankless water heater lineup. The NPN-120E is the fourth model introduction to the NPN-E (exterior) series. The new size is offered in separate natural gas and liquid propane configurations for outdoor-only operation. NPN-120E provides 4.2 GPM at 45° F temperature rise and stays in-line with the rest of the NPN series at 0.81 UEF. 

Rinnai's Demand Duo R-Series is a perfect replacement for regular-efficiency atmospheric tanks, the company notes.

Rheem commercial tankless water heating solutions offer thermal efficiency of up to 96% and the ability to easily scale systems up to 3,998,000 Btu/h.

With ultra-high performance and unprecedented space-saving installation flexibility, the S20W offers heating contractors multiple benefits for a variety of new installations as well as for retrofit projects, NTI Boilers states.

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 Laars commercial tankless electric water heater line powered by Keltech ranges from 5-144 kW. 

Bradley electric tankless water heaters powered by Keltech deliver dependable on-demand ANSI-ISEA-requires tepid water to emergency safety showers and eye/face washes. 

Bosch Thermotechology’s Greentherm 9000 series high-efficiency gas tankless water heater is the first of its kind, delivering endless hot water on demand, the company states.

A. O. Smith’s line of commercial gas tankless water heaters is available in indoor/outdoor models. 

Quite frequently I get phone calls and emails requesting sizing help for projects. Many times, they are the common straightforward applications for a restaurant, office building or hotel. And then there are those that are a bit strange, slightly challenging, and best of all, humorous.