ModelsOWB-9OWB-15OWB-25OWB-35OWB-50
Input Capacity BTU/HR90,000150,000250,000350,000500,000
Output Capacity BTU/HR76,500127,500212,500297,500425,000
Net Rating, Water BTU/HR66,500110,800184,700258,600369,500
Net Rating, Water Sq. Ft.5228751,4502,0302,900
Burner GPH.601.001.702.403.30
Flue Diameter, In.7771010
Shipping Weight, lbs.5277169802,0802,280
Width, In.23334252-5/857-5/8
Height, In.24-5/824-5/824-5/836-1/236-1/2
Depth, In.23-3/423-3/423-3/433-1/433-1/4
Approx. Water Content, Gal.5.58.210.828.531.7