New Paloma PH-28ROFN tankless outdoor gas water heater.
19,000 ~ 199,900 Btu/H
This unit can only be used with natural gas, it cannot be converted to propane.
This is a link to the user manual for more details about installation, etc.: http://www.pexheat.com/site/download/ph_PH-28R%20Spec%20Sheet.pdf