http://tinyurl.com/m935zrs<P>Navien NR-240A Condensing Tankless Water Heater with Pump and Buffer Tank, PropaneProduct Review<P> Click on the link for more reviews<P>98 percent thermal efficiency. 0.95 energy factor<P>17000 - 199000 BTU/hr<P>Flow rates - At 35 Degree Fahrenheit Rise : 11 GPM, At 45 Degree Fahrenheit Rise : 8.6 GPM, At 77 Degree Fahrenheit Rise : 5.1 GPM<P>Easy installation and PVC venting<P>Includes NR-10DU remote control<P>
