American Standard 40-Gal High 4,500-Watt Residential Electric Water Heater

OVERVIEW

The ENS40H-6 is a 40-gallon “high” profile residential electric water heater designed for installations that require additional height, offering a 37-gallon DOE rated capacity and a 51-gallon first-hour rating at a 90°F temperature rise. It operates on 240V single-phase power with dual 4,500-watt non-simultaneous elements and delivers up to 0.92 Uniform Energy Factor (UEF) for efficient hot water production.

Key Features & Benefits

• 4,500 W Electric Water Heater
• 40 gallons, 37-gallon DOE rated.
• First Hour Rating (FHR): 51 gallons at 90°F temperature rise.
• UEF: Up to 0.92 for efficient hot water delivery.
• High-profile configuration with increased height for specific mechanical room layouts.

• Heavy gauge steel tank for added strength and long service life.
• Glass-lined DuraGlas tank fired at 1600°F for enhanced corrosion resistance.
• Magnesium anode rod to help protect the tank and extend service life.
• 2-inch thick, non-CFC, HFO foam insulation to reduce standby heat loss and energy costs.

• Fully automatic surface-mounted thermostats with manual energy cut-off to help prevent overheating.
• Dual INCOLOY, low watt-density elements for efficient operation and longer element life.
• Temperature and pressure relief valve factory provided, relocatable from side to optional top location.

• Turbulence-inducing dip tube engineered to reduce sediment build-up inside the tank.
• Full-flow brass drain valve factory-installed for quick and easy tank drainage.
• Factory-installed heat traps on water connections to minimize standby heat loss into piping.

• Residential electric water heater tested and listed to UL 174.
• Meets or exceeds DOE efficiency requirements and ASHRAE Standard 90.1b.
• Standard 6-year limited tank and parts warranty, with an available 12-year limited tank warranty upgrade (12-year models include a second anode rod).