A.O. Smith Signature 100 38-Gallon Lowboy 4500-Watt Double Element Electric Water Heater - Item #816156 | Model #E6-40L45DVB

• Ideal hot water delivery for households with 2-3 people when sized appropriately

• Two 4,500-watt copper heating elements provide a first hour delivery of 51 gallons

• Save money and energy with this energy efficient model that operates at a 0.92 Uniform Energy Factor (UEF)

• Low-profile 32-in H x 23-in diameter design with top water connections for easier installation under counters, bathroom vanities or in cabinets

• Premium heating elements, anode rod and fused ceramic tank shield provide superior tank protection and extend water heater life

• Non-CFC polyurethane foam insulation and factory-installed heat trap nipples reduce heat loss for maximum efficiency and energy savings

• Easy temperature control with adjustable thermostat can be set higher for dishwashers and laundry machines or lower as needed

• Factory-installed temperature and pressure relief valve and tamper-proof drain valve ensures safe operation
  

Specifications

What our Experts Think

• Reliable hot water for small households – The 38-gallon capacity is ideal for homes with 2–3 people, providing dependable daily hot water supply.

• Powerful dual heating elements – Two 4500-watt copper elements deliver strong heating performance and faster recovery for showers, laundry, and dishes.

• Compact lowboy design – A low-profile tank fits easily in tight spaces like cabinets, under counters, or utility closets.

• Energy-efficient operation – With a Uniform Energy Factor around 0.92–0.94, it helps reduce energy usage while maintaining reliable performance.

• Long-lasting tank protection – Features an anode rod and fused ceramic tank shield to help prevent corrosion and extend tank life.

• Built-in safety features – Factory-installed temperature & pressure relief valve and tamper-resistant drain valve provide safe, dependable operatio

Q&A

Q: What type of water heater is the E6-40L45DVB?
A: It’s a 38-gallon lowboy electric water heater designed for residential use where space is limited, such as under counters or in cabinets.

Q: How powerful is the heating system?
A: The unit features two 4,500-watt copper heating elements, delivering strong heating performance and quick recovery.

Q: How much hot water can it deliver?
A: It offers a first-hour delivery of around 50–57 gallons, making it suitable for homes with 2–3 people.

Q: Is the water heater energy efficient?
A: Yes, it operates at about 0.92–0.94 Uniform Energy Factor (UEF) and includes foam insulation to help reduce heat loss and energy costs.

Q: What safety and durability features does it include?
A: The heater includes a fused ceramic tank shield, anode rod protection, temperature-pressure relief valve, and tamper-proof drain valve for safe and long-lasting operation.

Q: What warranty comes with this model?
A: It includes a 6-year limited residential warranty on the tank and parts.

Q: Who is this water heater best for?
A: Ideal for small to medium households (2–3 people) needing a compact electric water heater with reliable hot water supply.

Maintenance Tips

• Flush the Tank Annually: Drain and flush the tank to remove sediment buildup that can reduce efficiency and damage heating elements.

• Inspect the Anode Rod: Check the anode rod after the first 6 months and then yearly; replace it if heavily corroded to protect the tank from rust.

• Check Heating Elements: Periodically inspect the two 4500-W heating elements for scale buildup or wear to maintain consistent hot water performance.

• Test the T&P Relief Valve: Ensure the temperature-pressure valve works properly to maintain safe pressure levels.

• Inspect for Leaks: Check water connections, drain valve, and fittings regularly for leaks or corrosion.

• Maintain Clear Space: Keep the area around the heater clean and ventilated for safe operation.

• Professional Inspection: Schedule periodic service by a qualified technician to maintain efficiency and extend lifespan.