Home -> Products -> Heating and Cooling -> Gas Furnaces -> Ultra Series: Up to 96% AFUE Modulating ECM Motor

Ultra Series: Up to 96% AFUE Modulating ECM Motor

The Ruud RGGE, RGFG, and RGJF Ultra Series™ 90 Plus Communicating Modulating gas furnaces equipped with the Comfort Control2 System & Contour Comfort Control line of Upflow/Horizontal, & Dedicated Downflow, are designed for installation in closets, alcoves, utility rooms, or attics. The design is certified by CSA International.

Additional Benefits

The Comfort Control2 System™
Provides advanced service-ability with over 28 on-board diagnostics & fault history codes by detecting system & electrical problems. “Call for Service” alert notification is sent to the thermostat to alert the homeowner of required service. This includes dual seven segments LED & diagnostic history for easier system diagnostics & troubleshooting.

Serial Communication Enhanced
When installed with a Serial Communicating Condensing Unit & user interface control RHCTST550CMMS)500 Series thermostat this unit offers 4 or 2 wire installation, auto-configuration, & diagnostic messaging with full communicating capability.

Motor & Blower Compartment
Energy efficient & quiet ECM 3.0 communicating motor.  An insulated blower compartment, a slow-open gas valve, specially designed 2-speed induced draft motor & blower motor make it one of the most reliable & quietest furnaces on the market today.

Modulating Function
When used with a modulating thermostat, modulation rate between 40% and 100% of total capacity.

Two-stage Function
When used with a two-stage thermostat, furnace operates at 40% on first stage, & stages up to 65%, then 100% for second stage.

Multistage Function
When used with a single-stage thermostat, furnace functions as a three stage furnace operating at 40%, 65% & 100% of total capacity.

Low Profile
The “34 inch” [864mm] design is lighter & easier to handle, making is easily installed & leaves room for optional equipment & optimal access for maintenance.

Cabinet & Design
The units are constructed with Pre-paint galvanized steel cabinets for added reliability & durability. Solid doors & easy door removal & replacement makes for an easier time with service-ability. Also, all models are equipped with a molded permanent filter & right, left, or top side gas & electric inlet connections.

Patented Heat Exchanger
Primary heat exchanger constructed of aluminized steel and secondary heat exchanger constructed of stainless steel for maximum corrosion resistance and thermal fatigue reliability.

Direct Spark Ignition & Remote Sensor

The direct spark ignition with reduced firing rates is an efficient method of gas ignition while the remote flame sensor monitors the flame. For added safety & personal peace of mind the direct spark ignition with remote sensor
will lock out system after trial for ignition if main burner fails to ignite.

Furnace Control
For added customer assurance, all models feature an integrated board & are equipped with humidifier & electronic air cleaner hookups for added heating capacity & efficiency.

Thermostat is compatible with single or two-stage thermostats. (For optimal performance, two-stage thermostats are recommended.)  A variety of cooling coils & plenums designed to use with (Ruud Ultra Series™ & Super Quiet 80™), two stage gas furnaces are available as optional accessories.

Air Quality & Control
Units are equipped with a low speed constant fan & constant temperature rise for superior comfort. Along with constant CFM & Dip switch settings for sale


  • Models: RGFG, RGGE, RGJF
  • Serial Communicating Enabled Comfort Control² System
  • Variable Speed Motor
  • Modulating/Variable Capacity
  • High Efficiency
  • Advanced Indoor Air Quality Capability
  • Direct Spark Ignition (RGGE, RGJF)
  • Hot Surface Ignition (RGFG)


Consumer Literature
Sales Fact Sheet
Specification Sheet
Submittal Sheet
Tax Credit Form
Use and Care Instructions
Consumer Literature
Sales Fact Sheet
Specification Sheet
Submittal Sheet
Tax Credit Form
Use and Care Instructions
Consumer Literature
Sales Fact Sheet
Specification Sheet
Submittal Sheets
Tax Credit Form
Use and Care Instructions


Heat Exchanger Warranty - Limited Lifetime

Conditional Unit Replacement Warranty - Limited Lifetime (Registration Required)

Limited Parts Warranty - 10 Years

RGGE, RGFG, RGJF Warranty Information

Don't let limited cash-on-hand keep you from being comfortable.
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 Rheem 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.
Learn More