Induced Draft commercial gas water heaters are designed for easy installation in applications requiring large quantities of hot water

Features & Benefits – The tighter the commercial retrofit, the more you will appreciate how the Universal’s compact size and multiple  water connections simplify installations.  Choose from 80% thermal efficiency models that range from 250,000-360,000 Btu/h and have maximum temperature setting of 180 degrees Fahrenheit.

Space Saver Design – The short height and narrow jacket diameter, plus the top, front and rear water inlets/outlets offer the ultimate in installation flexibility.

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

Patented Technology – Universal’s proprietary steel formulation patented multi-flue design, combined with two coats of porcelain enamel, results in a superior heat exchanger design.

Stainless Steel Burners – Precision burners, raised port design are formed from high chromium stainless steel. Each burner assembly slides out like a drawer for quick inspection and maintenance.

Factory Installed Draft Inducer – Provides an induced draft allowing higher Btu's to be vented through a 6" vent.

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

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

Altitude Certifications – Up to 5,200 feet for natural gas and 2,000 feet for LP.

Patented Anode Rods – Anode design utilizes multiple rods to ensure corrosion resistance for a long tank life.

100 GD100-250(A) 250,000
100 GD100-270(A) 270,000
100 GD100-310(A) 310,000
100 GD100-360(A) 360,000

(A) Indicates available ASME models



  • Patented multi-flue tank design
  • 250,000 - 360,000 BTU/HR
  • System Sentinel™ LED diagnostic
  • Universal space saver design system

Energy Guide Details


  • AHRI
  • HLW on selected models
  • Classfied UL with Optional Kit
  • Canada CSA
  • US CSA (Star)


Universal Induced Draft


Tank - 3 Years

Parts - 1 Year

KwikComfort® Financing can help make your purchase even easier.
Ruud makes it easy to find a financing option that works for you! With many options and benefits available, KwikComfort Financing is the best way to get the home comfort you need without the wait.

  • Applications made easyWe'll help you avoid lengthy contracts, headaches and hassles.
  • Kwik credit decisionsYou'll get an answer to your application within minutes.
  • Fast credit for the futureFinance your Ruud equipment and anything you want to add later.
  • Reduced interest/fixed paymentsGet low interest and fixed monthly payments until the purchase is paid.
  • Minimum monthly paymentTake advantage of convenient monthly payments that fit your budget.
  • Deferred interest/no interestEnjoy interest-free payments as long as the balance is paid by the due date.