Model: RTEH55
from $245.8
5.5 kW, 240-Volt Non-Thermostatic Tankless Electric Water Heater, Commercial supplies on-demand hot water at 23 Amps. Its compact dimensions are 3 inches deep, 9.75 inches high, and 5 inches wide, using a 3/8-inch water connection.
Sizing is critical; a tank that is too small leads to cold showers, while one too large wastes energy. Consider heat pump (hybrid) models if replacing electric, as they pay for themselves in energy savings. Available from $245.8.
Water heaters are the second largest energy user in the home. Heat pump models drastically reduce electricity usage but cost more upfront.
Common Failure Modes
Tank leaks due to internal corrosion are fatal and require complete replacement. Heating elements in electric tanks and thermocouples in gas tanks are common, easily fixable failures.
Sizing is critical; a tank that is too small leads to cold showers, while one too large wastes energy. Consider heat pump (hybrid) models if replacing electric, as they pay for themselves in energy savings.
Tank water heaters last 8 to 12 years on average. Tankless water heaters can last 15 to 20 years. The single most important factor is water quality — hard water dramatically shortens lifespan by accelerating sediment buildup and anode rod consumption.
The 5.5 kW, 240-Volt Non-Thermostatic Tankless Electric Water Heater, Commercial is available at homedepot, starting at $245.8.
Water heaters are the second largest energy user in the home. Heat pump models drastically reduce electricity usage but cost more upfront.
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