RHEEM RUUD E120-18-G Gallon Electric Water Heater 18KW 208V-480V

( Brand: Rheem Ruud ), ( Manufacturer Part Number: E120-18-G ), ( Power Source: Electric ), ( Ec Range: A E ), ( Year Manufactured: 2025 ), ( Tank Capacity: 101-120 Gal ), ( Type: Storage Tank Water Heater ), ( Water Connection Location: Side, Top ), ( Energy Star: Compliant ), ( Heating System: Storage Tank ), ( Voltage: 208v-480v ), ( Features: Abrasion Resistant, Adjustable Thermostat, Automatic Shut Off, Electric ), ( Water Temperature Range: 80f To 190f ), ( Country/region Of Manufacture: United States ), ( Power: Greater Than 10000 W )

Review RHEEM RUUD New 120 Gallon 18kw Commercial Electric Water Heater 208v-480v

Introducing the Rheem Ruud E120-18-G 120 Gallon 18kW Electric Water Heater, a high-performance and efficient solution for your hot water needs. This water heater, available in both 208V and 480V options, is engineered to deliver consistent, reliable hot water for residential and commercial applications.

The E120-18-G boasts a generous 120-gallon capacity, which is ideal for larger households or establishments with high hot water demand. Its powerful 18kW heating element ensures quick recovery, allowing you to enjoy an endless supply of hot water without worrying about running out.

This electric water heater is designed with energy efficiency in mind. Its high-efficiency element and insulation system help reduce standby energy loss, lowering your overall energy consumption and utility bills. Additionally, the E120-18-G comes with a self-diagnostic control that monitors the temperature and pressure within the tank, ensuring optimal performance and prolonging the life of the unit.

The exterior of the E120-18-G features a sleek, corrosion-resistant copper and stainless steel tank, ensuring durability and longevity. The water heater's compact design allows for easy installation in various locations, while its adjustable thermostat enables customized temperature settings to suit your preferences.

The Rheem Ruud E120-18-G 120 Gallon 18kW Electric Water Heater is backed by a comprehensive limited warranty, providing you with peace of mind and confidence in your investment. This water heater is an excellent choice for those seeking a reliable, efficient, and cost-effective solution to their hot water needs.

Pros and Cons of Buying Rheem Ruud E120-18-G 120 Gallon 18kw Electric Water Heater (208V-480V)

1. **High Recovery Rate:** This water heater boasts an impressive recovery rate of 6.3 gallons per minute, ensuring quick heating for larger households.

2. **Energy Efficiency:** With an Energy Factor (EF) of 0.93, this water heater is energy efficient, reducing energy consumption and costs over time.

3. **Multi-Voltage Compatibility:** The unit can operate on both 208V and 480V power supplies, offering flexibility in installation.

4. **Large Capacity:** With a 120-gallon capacity, it can cater to the hot water needs of larger households or commercial applications.

5. **Heat Trap Nipples:** These help in reducing standby heat losses, improving energy efficiency and reducing energy costs.

6. **Dual Element:** The dual element design allows the heater to recover water faster, ensuring ample hot water supply even during peak usage.

7. **Long Warranty:** Rheem offers a 6-year limited warranty on tank and parts, providing peace of mind and protection against potential defects.

8. **High Price:** Compared to other electric water heaters, the Rheem Ruud E120-18-G is pricier, which might be a deterrent for some buyers.

9. **Heavy and Bulky:** With a weight of approximately 280 lbs, this water heater is heavy and requires ample space for installation.

10. **Complex Installation:** Given its size and multi-voltage compatibility, the installation process for this water heater might be more complex than some other models.

The Rheem Ruud E120-18-G 120 Gallon 18kw Electric Water Heater offers impressive recovery rates, energy efficiency, and large capacity, making it a great choice for larger households or commercial applications. Its multi-voltage compatibility and long warranty add to its appeal. However, its high price, heavy weight, and complex installation might deter some buyers.

If you have a larger household or commercial application with high hot water demands, the Rheem Ruud E120-18-G is an excellent choice thanks to its impressive features and capabilities. However, if you have a smaller household or a tighter budget, there might be more affordable options that would better suit your needs. Always consider your specific requirements and budget when making a purchase.

Details:

This includes my changing the heating elements to selected voltage . Untitled Document2014 Master Template to copy from. The inner tank has been checked and is perfect. It may or mayn't have all of the original stickers, and some scratches wordings but IS BRAND NEW AND FULLY FUNCTIONAL.

Some specs are in the last few pictures. More specs in last few pictures. All water heaters of any type MUST be installed by a trained Rheem certified plumber. This unit is currently set up 208/240V, three or single phase, but field convertible and can run 480V as well, phase.

Fully functional, but there are some small creases on the outer cover see pictures. There are 3 inches of hard foam insulation between the cover and tank, there NO DENTS on tank or anything that affects functionality. This is BRAND NEW and has NEVER had water in it. Any questions, feel free to ask.

Just let me know the voltage and phase you require I will set it up for your application before shipping.

part #: e12018 prices

• $135.00-$300.00

specifications wateheat:

• brand: Rheem Ruud
• mpn: E120-18-g
• power source: Electric
• ec range: A E
• year manufactured: 2025
• tank capacity: 101-120 Gal
• type: Storage Tank Water Heater
• water connection location: Side, Top
• energy star: Compliant
• heating system: Storage Tank
• voltage: 208v-480v
• features: Abrasion Resistant, Adjustable Thermostat, Automatic Shut Off, Electric
• water temperature range: 80f To 190f
• country/region of manufacture: United States
• power: Greater Than 10000 W

general wateheat:

• Heating, Cooling Air > Water Heaters > Standard Water Heaters
• condition: Open box

returns wateheat:

• policy: No Returns

payments wateheat:

• wallet: Apple-pay
• credit card: Discover
• other

offer wateheat:

• options: Ship-to-home
• quantity: 1
• sold: 0
• availability: In Stock
• started: October 11, 2025

seller wateheat:

• rating: 100.0%
• city: Little Rock, Arkansas
• # reviews: 854

shipping wateheat:

• class: Freight
• service: Flat Rate Freight
• cost: $0.00
• type: Fixed

Rheem Ruud E120-18 Is Similar To:

• Rheem 445034436488 Mid-efficiency 7gpm Indoor Natural Gas Tankless Water Heater Rtg-70dvlp-1 (40% similar) Working item with dents and top noticeable damage remote may or not be good...(May 17th, 2024)
• Rheem Pro G75-76n Pro G75-76n Rh 75 Gal Tank 75100 Btu Natural Gas Residential Water Heater (41.1% similar) It has a storage capacity of 75 gallons and heating rating 75,100 btu , which makes it perfect for medium-sized households. The water temperature range is maximum 160 f, and it suitable for indoor mounting.the heater profile tall, the connection location on side. This water heater is perfect for...(May 17th, 2024)
• Rheem Retex-06t 6 Kw 1.0 Gpm Electric Tankless Water Heater Gray (52.3% similar) The digital display allows for easy temperature adjustments, while the compact and stylish design takes up minimal space. With a powerful 6 kw heating system, it can provide instantaneous hot water on demand. This water heater is designed for indoor use and corded electric, with a 1/2 in not...(May 17th, 2024)
• Rheem 22v40f1 Heater 22vf041 (37.8% similar) Ready to use, was changed that's why I'm selling it...(May 18th, 2024)
• Rheem Xe06p06pu20u0 2 Gal Compact 1440w 1 Element Point-of-use Electric Water Heater 120v Used (53.1% similar) It is suitable for use with coal and battery power sources, its color gray. The unit type is a gallon, and the water temperature range between 90-150 degrees. This water heater is ideal for anyone who needs a reliable and powerful heating solution. It comes with a temperature pressure relief...(May 18th, 2024)
• Rheem Ap15258c-1 Natural Gas Water Heater Burner Assembly Ap16614a As39844 Oem Part (39.3% similar) Shipped with USPS ground advantage. Rheem natural gas water heater burner assembly AP16614A AS39844 - oem part. Condition is used...(May 19th, 2024)
• Rheem As39845 Ruud Water Heater Burner Assembly (36.9% similar) Shipped with USPS ground advantage. Rheem Ruud water heater burner assembly AS39845. Condition is used...(May 19th, 2024)
• Rheem Eco200xeln-3 9.5 Gpm Natural Gas Outdoor Smart Wifi Tankless Water Heater (39.5% similar) This Rheem thankless water heater is a great option for those looking to heat their instantly and efficiently. The Eco 200 XYLENE-3 model has a btu /h heating rating of 199,000 and is equipped with WI-fie smart home protocol for easy monitoring control. This water heater is ideal for outdoor use and...(May 19th, 2024)
• Rheem Sp20303a Protech Gray Black Water Heater Thermostat Gas Control Valve (39.2% similar) Color: gray black. Compatible product: gas combination boiler...(May 19th, 2024)
• Rheem Ruud Richmond 650 Ap15255a Delta Ap15255a-1 Water Heater Gas Valve Thermostat (33.7% similar) Condition is used. Shipped with USPS ground advantage. 650 delta AP15255A-1 Rheem Richmond water heater gas valve thermostat...(May 20th, 2024)
• Rheem Rtg20235at Front Cover For Tankless Water Heater (51.8% similar) RT-95 XYLENE-1. Front cover for Rheem thankless water heater - RTG20235AT, item is in good condition with labels and branding removed...(May 20th, 2024)