RHEEM GX90-550A Xtreme 90 Gallon Commercial 550,000 BTU Water Heater – Wholesale Water Heater

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RHEEM GX90-550A Xtreme 90 Gallon Commercial 550,000 BTU Water Heater ASME Natural Gas Low NOx

  • Brand: Rheem
  • Availability: In Stock
  • SKU: GX90-550A
  • Description
  • Specifications
  • Comparable Brands

Commercial 90 Gallon Xtreme 550,000BTU Natural Gas Water Heater; Brand: Rheem; Model #: GX90-550A; Series: Rheem Xtreme; Automatic Flue Damper; Direct Spark-to-Pilot Ignition System; 3-Year Limited Tank Warranty; Space Saver Design; Used in Motels, Hotels, Gyms, Schools, Restaurants, and Businesses. 

BrandRheemWeight945 lbsHeight74.5"
ModelGX90-550AGallons90 galDiameter30"
Warranty3 YearsBTU550,000 BTUVent Size10"
Fuel TypeNatural GasEfficiency80%Vent TypeStandard


A.O. SmithBTR-500A500,0008580%27-3/4"82-1/4"
Bradford WhiteD-80L-505-3NA505,0008080%30-1/4"69"
LochinvarCGN500 100 A500,0008580%27-3/4"82-1/4"
StateSBD85 500NE A500,0008580%27-3/4"82-1/4"


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Download Rheem documents for this water heater such as the Specifications and installation manual.

Specificiations Brochure

Xtreme™ is a family of high-input, fast-recovery commercial water heaters that complies with Low NOx Emissions

Features and Benefits
Xtreme is an advanced line of fast recovery commercial gas water heaters. These products can deliver up to 693 gallons per hour at 100 degree F rise. The small jacket diameter makes it a popular choice for retro fits and it is a versatile choice for new construction. Models range from 500,000-715,000 BTU/h, with a maximum temperature setting of 180 degrees Fahrenheit.

Space Saver Design
Xtreme maximizes installation adaptability by offering models with front and rear inlet/outlet water connections. Short heights and small jacket diameters result in greater installation flexibility.

System Sentinel™ LED Diagnostic System
Our exclusive diagnostic system, with glowing LED lights, verifies system operation sequence by sequence.

Automatic Flue Damper
Low profile design minimizes overall product height. Heavy duty vent hood supports are designed to withstand rigors of installation.

Specialized Burner Assembly
Each model features five premix burners mounted into a metal face plate and sealed with a Viton gasket. Patented “quick release” manifold for easier service

Direct Spark-to-Pilot Ignition System
Energy saving ignition that ignites pilot only when there is a call for heat.

Round Premix Burners
Precision burners are formed from high chromium stainless steel.

Low NOx Emissions
GX90-550 and GX90-640 meet low NOx emissions of less than 40 ng/J.

Full-port, Full-flow Drain Valve
Factory installed brass drain valve allows for faster draining and servicing.

Altitude Certifications
Standard Natural and LP models are certified up to 2,000 feet. High altitude models, 8,000 feet

Anode Rods
Patented design utilizes multiple magnesium rods to ensure long life and corrosion resistance.

3-Year limited tank warranty

Shipping Guarantee

All of our freight shipments have a shipment guarantee! This means that if your water heater arrives later then the estimated delivery window shown on the product page we will credit you $100 upon delivery. 

How long does shipping take?

Shipping times can vary from water heater to water heater, however most in stock shipments will arrive in 2-5 business days depending on how close the warehouse is to the shipping address. On each product page we give an estimated delivery window which will show roughly when a product will arrive, if you need a better estimate please call into (313) 626-6800 and one of our customer support representatives can assist you. 

Expedited Shipping

A select number of our products are available for expedited shipping. If we offer expedited shipping on a product it will show the option at checkout. Cost and times will depend on your location and availability of the water heater. Most expedited shipments will arrive in 1-3 business days. All expedited shipments are shipped LTL and are only estimated delivery times. For any guaranteed expedited shipments/overnight shipments please contact our customer support team for a quote. 

Where do you ship from?

Our standard deliveries will ship from the closest warehouse to your shipping address. We have several warehouses in Michigan and can also ship out of any Rheem warehouses in the United States. Rheem has warehouses in Colorado, California, Florida, Texas, New Jersey, Alabama, and Illinois. Depending on availability and your location we will determine the best possible warehouse to ship from to ensure a timely delivery.

Do you deliver on weekends?

Deliveries, except for USPS, are not typically made on Saturdays or Sundays. This means any commercial water heater will not be shipped over the weekend.

Where do you ship?

We ship to the continental united states. Some products can be shipped to Alaska and Hawaii, but please contact us first to determine additional shipping cost and estimated delivery time.

Certain products are not available in Texas and California. If a product is excluded from certain states it will be noted in the product description. These products are not allowed in these states, so there are no exceptions to these exclusions.

Residential water heaters are not available for shipment. Please arrange for local pickup if needed.

Can I pick up my order?

Most orders are available for pickup at any of our warehouses in Detroit, Michigan. If you would like to pick up your order please select that option at checkout. Local pickups may be subject to a pickup fee. If your order is not being shipped from the manufacturer it is typically available the same day you place the order.

Can I track my shipment?

Once your order ships, you will receive a Ship Confirmation email, and have an option to receive email updates on the delivery status of your order. You will also receive a tracking number from the designated carrier for your shipment. If you do not receive this tracking number please contact us, and we will provide it to you.

If you're purchasing an item being dropshipped you will not receive tracking information until the product has been shipped from the manufacturer.

How will my shipment arrive?

Smaller parts and accessories will arrive to your porch or mailbox. Please note that tankless water heaters may require a signature upon delivery. 

For large items that cannot be shipped via standard UPS or FedEx services, we work with delivery companies to get your items to you. These partners deliver to your curb at the end of your driveway, and you are responsible for moving the items from there. Please note, if you live down a road or driveway that the delivery truck cannot access without causing damage to the truck we may need to make special arrangement for delivery, so please let us know. These carriers will call to schedule delivery so you can be home to inspect your items and accept delivery.

We recommend opening the boxes and inspecting the products for any signs of damage, such as broken parts or chips and cracks in the finish. While we do our best to make sure items are packaged safely and securely to prevent damage, we recognize that fragile products will occasionally break in transit to your doorstep. If you see any signs of damage, firmly refuse the damaged items and keep any that are in good condition. Do not let the driver leave without inspecting. If driver refuses to stay during inspection, sign "Subject to Inspection" on the delivery receipt and call us immediately to report damages.