The new NPN will be offered in two series, the NPN-U (universal) and NPN-E (exterior), both of which will be available in 160,000 Btu/h, 180,000 Btu/h and 199,900 Btu/h models for either natural gas or liquid propane.

Bradford White’s Infiniti K Series of tankless water heaters is the smarter way to go tankless, the company says.

The temperature of the thermal storage tank can vary over a wide range.

Why Tankless?

Rinnai’s C199 model is a condensing tankless water heater with a heat exchanger.

 Laars’ Mascot LX condensing combi boiler and tankless water heater features a heat exchanger.  

The NCC1991 condensing tankless water heater from Noritz America delivers a thermal efficiency of 94% with an input range of 16,000 to 199,900 Btu. 

The ranking of the products was determined by the amount of clicks on product links in pme’s eNewsletter.

In April 2010, the U.S. Department of Energy issued new efficiency standards for residential storage water heaters — gas-fired, oil-fired and electric — and gas-fired tankless water heaters. These efficiency standards become effective in April 2015.