Gas Furnace – 92% WFAX-B** (Ultra Low NOx)

GrandAire residential equipment is AHRI-Certified and ensures year-round comfort. We offer a full line of heat pumps, air conditioners, furnaces and package units that are built to last and environmentally friendly. No matter what your needs, GrandAire has the right fit for you.

Gas Furnace – 92% WFAX-B** (Ultra Low NOx)

Experience superior comfort and efficiency with our Gas Furnace, designed with advanced technology to deliver optimal performance. This unit boasts an impressive AFUE rating of up to 92.1% in all positions, ensuring maximum energy efficiency. It features a single-stage gas valve and an 18-speed, constant torque blower motor for consistent airflow. The furnace is equipped with enhanced diagnostics with an easy-to-read 3-digit display for faults and status, providing you with accurate and timely information about the unit’s operation.

The Gas Furnace not only delivers powerful heating capacity ranging from 40,000 to 120,000 BTUh but also ensures the highest quality with its corrosion-resistant, prepainted steel cabinet. It includes a high-temperature limit control designed to prevent overheating and direct ignition with a Silicon Nitride igniter for reliable operation. The furnace meets stringent emission standards, emitting less than 40 ng/J of NOx, making it suitable for installation in California air quality management districts. With our 1-Year No Hassle Replacement™ Limited Warranty, 5-Year Parts Limited Warranty, and 20-year Heat Exchanger Limited Warranty, you can have peace of mind knowing your investment is protected.

FEATURES & BENEFITS

  • Enhanced diagnostics with easy to read 3 digit display for faults and status
  • Up to 92.1% AFUE in upflow, horizontal, and downflow positions
  • Single-stage gas valve
  • Cabinet air leakage less than 2.0% at 1.0 in. w.c. and cabinet air leakage less than 1.4% at 0.5 in. w.c. when tested in accordance with ASHRAE standard 193
  • Approved for Twinning applications with accessory kit (60B042,80B048, 80C060, 100C060, 120D060 models, only).
  • Approved for Manufactured Housing/Mobile Home applications with accessory (order separately)
  • NOx emissions less than 40 ng/J; can be installed in California air quality management districts with a 40 ng/J NOx emission limit.
  • 1-Year No Hassle Replacement™ Limited Warranty*
  • 5-Year Parts Limited Warranty *
  • Additional 5-Year Parts Limited Warranty upon timely registration *
  • 20-year Heat Exchanger Limited Warranty *

* See warranty certificate for details and restrictions

SPECIFICATIONS

  • Multi 18-speed, constant torque (MCT) ECM blower motor
  • Flame roll-out sensors standard
  • Adjustable heating blower OFF delay
  • Factory set blower ON delay
  • RPJ® primary heat exchanger
  • Stainless steel secondary heat exchanger
  • High temperature limit control designed to prevent overheating
  • Direct ignition with Silicon Nitride igniter
  • High quality, corrosion-resistant, prepainted steel cabinet
  • Heating capacity: 40,000 – 120,000 BTUh

**Ultra-Low NOx

 

Specifications

Physical

Blower Motor Type: ECM (Electronically Commutated Motor)
Blower Motor Speeds: 5 (Five)
Blower Motor RPM: 600
Maximum Pressure: 13.6
Gas Connection Size: 1/2
Heat Exchanger Type: Stainless Steel Tubular
Number Of Burners: 2, 3, 4, 5, 6
Ignition Type: Silicon Nitride
Air Flow Direction: Multi-Position

Electrical

Cycle: 60
Phase: Single
Voltage: 115
Circuit Breaker – Max Amps: 15amp

Performance

BTU Input: 40000, 60000, 80000, 100000, 120000
BTU Output: 37000, 56000, 75000, 93000, 111000
AFUE: 92.1