State GT-140-NIH – Condensing Ultra-Low NOx Indoor 120,000 BTU Natural Gas Tankless Water Heater by Mark | Aug 25, 2017 Share this:Click to share on Reddit (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to email this to a friend (Opens in new window)Click to print (Opens in new window)