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  3. RHEEM RUUD GX90-640A

RHEEM RUUD GX90-640A Extreme Natural Gas Water Heater Asme 640K Cert

Gx90-640a Rheem Ruud Extreme 640k Btu Natural Gas Commercial Water Heater Asme Cert

( Brand: Rheem Ruud ), ( Manufacturer Part Number: GX90-640A ), ( Part Type: Water Heater ), ( Tank Capacity: 81-100 Gal ), ( Energy Star: Compliant ), ( Certifications: Asme Certified ), ( Power Source: Ng ), ( Heating System: Boiler ), ( Btu/h Heating Rating: 640000 ), ( Year Manufactured: 2025 ), ( Country/region Of Manufacture: United States ), ( First Hour Recovery: 620 Gph )

Review RHEEM RUUD Extreme 640k Btu Natural Gas Commercial Water Heater Asme Cert

Introducing the Rheem Ruud GX90-640A Extreme 640K Natural Gas Water Heater, an ASME-certified appliance designed for superior performance and reliability in providing hot water for your home. This water heater is an excellent choice for those seeking energy efficiency, durability, and ample water supply.

The GX90-640A model boasts a 64-gallon storage capacity, perfect for larger households with increased hot water demands. With its natural gas fuel source, it offers a more eco-friendly alternative to electric water heaters, reducing your carbon footprint and potentially lowering your utility bills.

This water heater is ASME certified, meaning it adheres to the highest safety and quality standards established by the American Society of Mechanical Engineers. The tank is made from high-quality steel, ensuring long-lasting durability and resistance to corrosion. The unit's advanced technology includes a high-performance glass lining that further enhances the tank's strength and longevity.

The Rheem Ruud GX90-640A Extreme features an energy factor of 0.63, which is an excellent measure of its overall thermal efficiency. This high rating translates to energy savings and lower utility costs. Additionally, the unit comes with a factory-installed draft diverter to ensure optimal combustion efficiency and minimize gas emissions.

To provide consistent and efficient hot water delivery, this water heater is equipped with a high-performance burner designed to heat up the water quickly and efficiently. The unit's temperature control system allows fine-tuning of the water temperature, ensuring your comfort and energy savings. A user-friendly control panel makes it easy to monitor and adjust settings as needed.

The Rheem Ruud GX90-640A Extreme 640K Natural Gas Water Heater comes with a 10-year limited warranty on the tank and a 6-year limited warranty on parts, giving you peace of mind in your investment. This energy-efficient, reliable, and durable water heater is an excellent choice for any home, delivering ample hot water while reducing energy consumption and saving you money on utility bills.

The Rheem Ruud GX90-640A Extreme 640K Natural Gas Water Heater, ASME certified, is a popular choice for those in need of a reliable and efficient water heating solution. Here are some pros and cons to help you make an informed decision:

Pros:

1. High Energy Efficiency: With an Energy Factor of 0.64, this water heater can help save on energy costs over time.

2. Large Capacity: This model offers a 64-gallon capacity, making it ideal for larger households or businesses.

3. ASME Certification: The ASME certification ensures that the water heater meets the highest safety and quality standards.

4. Direct Venting: The direct venting design allows for installation in areas where venting through a chimney is not an option.

5. Durable Construction: The tank is made of heavy-duty materials and is designed to last for many years.

Cons:

1. High Initial Cost: The Rheem Ruud GX90-640A Extreme 640K Natural Gas Water Heater is more expensive than some other models on the market.

2. Complex Installation: Due to its size and features, installation may require the assistance of a professional plumber or HVAC technician.

3. Limited Warranty: The standard warranty covers only the tank and parts for a limited period of time, although extended warranties are available.

In conclusion, the Rheem Ruud GX90-640A Extreme 640K Natural Gas Water Heater offers several advantages, including high energy efficiency, large capacity, and ASME certification. However, it also comes with a higher initial cost and a more complex installation process. Ultimately, if you're looking for a large capacity, reliable, and efficient water heater, this model may be worth the investment.

Recommendation:

If you're in the market for a natural gas water heater with a large capacity and high energy efficiency, the Rheem Ruud GX90-640A Extreme 640K is a solid choice. Keep in mind that the higher initial cost and complex installation process may be factors to consider, and be sure to factor in the long-term energy savings when making your decision. If you're unsure about installation or have any questions, consult with a professional plumber or HVAC technician.

Details:

Fully functional, but there a few small dings and scratches on the outer casing, NO DENTS tank or anything that affects functionality. It may or not have all of the original stickers, and some scratches dings but IS BRAND NEW AND FULLY FUNCTIONAL. Manufactured in 2025, this is not a 10 year old unit passed off as new. Inner tank has been checked and is perfect, all valves electronics were re-checked are fully functional as well.

Untitled Document2014 Master Template to copy from. Some specs are in the last few pictures. This is brand new and has NEVER had water in it. All water heaters of any type MUST be installed by a trained Rheem certified plumber.

part #: gx90640a prices

  • $250.00-$684.00

specifications wateheat:

  • brand: Rheem Ruud
  • mpn: Gx90-640a
  • part type: Water Heater
  • tank capacity: 81-100 Gal
  • energy star: Compliant
  • certifications: Asme Certified
  • power source: Ng
  • heating system: Boiler
  • btu/h heating rating: 640000
  • year manufactured: 2025
  • country/region of manufacture: United States
  • first hour recovery: 620 Gph

general wateheat:

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

offer wateheat:

  • quantity: 1
  • availability: In Stock
  • sold: 0
  • started: October 10, 2025
  • options: Ship-to-home

shipping wateheat:

  • cost: $0.00
  • transit: 6-12 Days
  • type: Fixed
  • service: Economy
  • class: Economy

returns wateheat:

  • policy: No Returns

seller wateheat:

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

payments wateheat:

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part type: water heater, tank capacity: 81-100 gal, energy star: compliant, certifications: asme certified, power source: ng, heating system: boiler, btu/h heating rating: 640000, year manufactured: 2025, country/region of manufacture: united states, first hour recovery: 620 gph,
category: home & garden > heating, cooling air > water heaters > standard water heaters, sku: 5507697202078682,

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