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Model HD Deionized (RO/DI) Water Heater Point-of-Use up to 88 KW Single or Three Phase Voltages. The Hubbell Model HD is a dependable and trouble-free source for hot water in continuous, cyclical, or variable flow systems in a wide range of hot deionized water, RO water and mildly corrosive applications.
Model D Deionized (DI) Water Heater 1-119 Gallon Capacity, Up to 58 KW Single or Three Phase Voltages. The Hubbell D model deionized water heater is specifically designed for systems requiring large draws of hot DI water with a fixed period of time between cycles.