The Rheem Professional Classic is a water heater available in both gas and electric models. The gas models range in capacity from 28 to 75 gallons, with an energy factor of up to .67. Gas units are available with several venting options, including direct vent and power vent. There are also Ultra Low NOx models, as well as atmospheric, direct vent and direct vent co-axial units for manufactured housing. Electric units have a .95 energy factor and capacities from 19.9 to 55 gallons. Professional Classic electric units include a standard model, a point-of-use model for installation in smaller spaces, and a model designed for manufactured housing.
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