Rheem’s new line of water heaters is specifically designed for wholesalers and plumbing professionals. Rheem Professional Water Heaters include exclusive features, product tiers, professional-grade quality and contractor-focused benefits. The Professional Prestige features EFs up to 0.94 for gas-fired tankless units, 0.82 for gas-fired tank models and 2.45 for electric units. Professional Classic Plus units offer high EFs of up to 0.70 for gas models and 0.95 for electric units. Professional Classic water heaters have EFs that reach up to 0.67 for gas models and 0.93 for electric units. System Sentinel diagnostics, which feature an LED indication of the status of the heater to confirm operation and aid on service calls, comes standard on all electric models.