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The A.O. SMITH DEN 52 201023000R 100 is a commercial electric water heater designed for demanding hot water applications in light commercial and institutional settings. Rated at 6 kilowatts (KW) and configured for 208-volt, three-phase power, this unit runs a dual 6/6KW element arrangement that delivers consistent heating performance across the load. Licensed plumbers and commercial mechanical contractors typically specify and install this model as part of a larger domestic hot water system. It is built to handle the reliability requirements that commercial environments demand from a dedicated water heating appliance.
This water heater is suited for commercial installations where three-phase 208-volt electrical service is available and a compact, electrically powered unit is preferred over gas-fired alternatives. Typical deployment scenarios include small office buildings, light industrial facilities, restaurants, or multi-unit service points where a dedicated electric water heater is integrated into the mechanical room. The DEN52 model series from A.O. SMITH is positioned for these commercial-grade applications requiring consistent, code-compliant hot water delivery.
Designed as an OEM-style commercial electric water heater replacement or new installation unit within the A.O. SMITH DEN52 model series, requiring a 208-volt three-phase electrical supply.
Installation must be performed by a licensed plumber or qualified mechanical contractor in accordance with local plumbing codes and the National Electrical Code (NEC) for three-phase appliance connections. Shut off the electrical supply at the breaker panel and close the cold water supply valve before beginning any service or installation work. Verify that the available electrical service matches the 208-volt, three-phase requirement before connecting. Do not energize the heating elements until the tank is fully filled with water to prevent dry-fire damage.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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