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Goodman GD9S800403AX

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal

By Goodman | Model: GD9S800403AX | ID: 100970
✓ Manufactured in the USA
✓ No Sales Tax - in most states excluding California
✓ Manufacturer Warranty Included
✓ Most Products In Stock - Call or Text (833) 658-3387 for availability
$1,154.00 + FREE SHIPPING

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Product Details

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

The Goodman GD9S800403AX is a compact, high-efficiency furnace delivering reliable heating performance with a 40,000 BTU capacity and 80% AFUE. As a California Low NOx-compliant model, it’s built to meet specific emissions standards while still offering durable construction, a multi-speed ECM motor, and a quiet, energy-efficient operation. Designed for downflow or horizontal installations, this furnace is ideal for smaller homes in regions requiring low NOx output.

Key Features

  • 40,000 BTU Heating Capacity – Perfect for Small Homes or Spaces
  • 80% AFUE – Meets Standard Efficiency Rating with Metal Flue Venting
  • California Low NOx Compliant – Emits Less Nitrogen Oxide for Reduced Environmental Impact
  • Multi-Speed ECM Blower Motor – Enhances Airflow and Cuts Power Use
  • Single-Stage Operation – Delivers 100% Heating Output When Active
  • Heavy-Gauge Steel Cabinet – Reduces Heat Loss & Lowers Operating Noise
  • Hot Surface Ignitor – Provides Reliable, Efficient Startups
  • Self-Diagnostic Control Board – Simplifies Troubleshooting and Maintenance
  • Flexible Installation – Supports Downflow or Horizontal (Left/Right) Configurations
  • Low-Voltage Color-Coded Terminals – Speeds Up and Simplifies Installation

Important California Compliance Note

This unit meets California Low NOx standards but cannot be installed in the following counties due to Ultra-Low NOx requirements: Los Angeles, Fresno, Joaquin, Kern, Kings, Madera, Merced, Orange, Riverside, San Bernardino, Stanislaus, and Tulare.
For Ultra-Low NOx-compliant furnaces, please contact us directly.

View More Furnaces

Specifications

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

Brand Goodman SKU GD9S800403AX
Type Gas Heat Category Gas Furnaces
Refrigerant Type R-32 Heating BTU 40,000
Temperature Rise Range (°F) 25-55 Vent Diameter 4"
AHRI Certificate Number 215358036 Airflow Direction Downflow/Horizontal
Exhaust Flue Requirement Metal Product Features Low NOx, New Refrigerant Compliant
Furnace Efficiency / AFUE 80% Blower Motor 9-Speed - ECM
Maximum CFM 1200 Horsepower 1/2 HP
Configuration Downflow/Horizontal Electrical 115 V. 1 Phase 60 Hz
Max Breaker Size 15 Amps Min. Breaker Size 7.7 Amps
Low NOx YES NOx < 40 NG/J NOx
Burner Stages Single No. of Burners 2
Fuel Type Propane, Natural Gas Height 33 3/8"
Width 14" Depth 28"
Shipping Weight (lbs) 90 UPC 633190210036
Warranty

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

Warranty Type Residential Multi-Family Commercial
Standard Warranty 5 year parts 5 year parts 5 year parts
Registered Warranty 10 year parts 10 year parts 5 year parts
Documents

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

GR9S80 / GD9S80 Specification Sheets

GR9S80 / GD9S80 Installation Manual

GR9S80 / GD9S80 Warranty Information

Shipping

We ship freight to the 48 contiguous states, excluding Hawaii and Alaska. Some shipping restrictions may apply. Liftgate services may incur an additional fee, which can be added at checkout.

Order Processing: Orders are processed within 1-3 business days (excluding weekends). Orders placed on Fridays will be processed the next business day. Once shipped, you’ll receive an email confirmation with tracking details. Backordered products may have longer processing times, and we will notify you of any delays.

Arrival of Goods: Freight delivery times depend on the carrier's schedule and routing. Estimated delivery times are provided at checkout. The carrier will contact you to arrange delivery, and you must be present to sign for the shipment.

Damages: Upon delivery, inspect your shipment carefully for any damage or discrepancies. Note any issues on the carrier’s delivery receipt and notify us within 24 hours. Claims made after this timeframe may be denied. Photographic proof is required for processing claims. Report damages or discrepancies immediately at support@hvacstore.com.

Returns: For returns unrelated to damage, contact us at support@hvacstore.com for authorization. Return shipping costs are the customer’s responsibility, and a 20% restocking fee applies. Items must be in original packaging and condition for a refund.

Delivery Receipt: Before signing the delivery receipt, inspect the shipment for any damage. Your signature confirms acceptance of the delivery unless issues are noted.

Policy Updates: Our shipping policy may change, and updates will be communicated via our website or other channels. For any questions, contact The HVAC Store at support@hvacstore.com or call (833) 658-3387.

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Customers rate us 5.0/5 based on 9 reviews.
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I’ve installed Goodman heat pumps before at a similar price point. This was better quality, and a great deal from the HVAC store. I’m always a little nervous about picking the lowest cost provider but the came through quick and no damage.

I’m in the middle of install so if you don’t see an update, things went well. As I said, first impressions as I opened it up to adjust airflow direction was very impressed!

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Paul R
Excellent company to purchase from

I wasn’t to sure about if this company could deliver it quickly but it arrived within a week. No issues. I needed this one for parts as my first one that I installed a year ago had the ecm go out on the blower fan. Parts are hard to come by for this Chinese brand. I think the ecm went out due to condensation in the main supply plenum dripping onto fan motor. I do like this ac unit but hope the fan lasts longer than a year. I covered the fan ecm with flex seal tape.

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Product Details

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

The Goodman GD9S800403AX is a compact, high-efficiency furnace delivering reliable heating performance with a 40,000 BTU capacity and 80% AFUE. As a California Low NOx-compliant model, it’s built to meet specific emissions standards while still offering durable construction, a multi-speed ECM motor, and a quiet, energy-efficient operation. Designed for downflow or horizontal installations, this furnace is ideal for smaller homes in regions requiring low NOx output.

Key Features

  • 40,000 BTU Heating Capacity – Perfect for Small Homes or Spaces
  • 80% AFUE – Meets Standard Efficiency Rating with Metal Flue Venting
  • California Low NOx Compliant – Emits Less Nitrogen Oxide for Reduced Environmental Impact
  • Multi-Speed ECM Blower Motor – Enhances Airflow and Cuts Power Use
  • Single-Stage Operation – Delivers 100% Heating Output When Active
  • Heavy-Gauge Steel Cabinet – Reduces Heat Loss & Lowers Operating Noise
  • Hot Surface Ignitor – Provides Reliable, Efficient Startups
  • Self-Diagnostic Control Board – Simplifies Troubleshooting and Maintenance
  • Flexible Installation – Supports Downflow or Horizontal (Left/Right) Configurations
  • Low-Voltage Color-Coded Terminals – Speeds Up and Simplifies Installation

Important California Compliance Note

This unit meets California Low NOx standards but cannot be installed in the following counties due to Ultra-Low NOx requirements: Los Angeles, Fresno, Joaquin, Kern, Kings, Madera, Merced, Orange, Riverside, San Bernardino, Stanislaus, and Tulare.
For Ultra-Low NOx-compliant furnaces, please contact us directly.

View More Furnaces

Specifications

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

Brand Goodman SKU GD9S800403AX
Type Gas Heat Category Gas Furnaces
Refrigerant Type R-32 Heating BTU 40,000
Temperature Rise Range (°F) 25-55 Vent Diameter 4"
AHRI Certificate Number 215358036 Airflow Direction Downflow/Horizontal
Exhaust Flue Requirement Metal Product Features Low NOx, New Refrigerant Compliant
Furnace Efficiency / AFUE 80% Blower Motor 9-Speed - ECM
Maximum CFM 1200 Horsepower 1/2 HP
Configuration Downflow/Horizontal Electrical 115 V. 1 Phase 60 Hz
Max Breaker Size 15 Amps Min. Breaker Size 7.7 Amps
Low NOx YES NOx < 40 NG/J NOx
Burner Stages Single No. of Burners 2
Fuel Type Propane, Natural Gas Height 33 3/8"
Width 14" Depth 28"
Shipping Weight (lbs) 90 UPC 633190210036
Warranty

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

Warranty Type Residential Multi-Family Commercial
Standard Warranty 5 year parts 5 year parts 5 year parts
Registered Warranty 10 year parts 10 year parts 5 year parts
Documents

Goodman R32 80% AFUE Gas Furnace 40K BTU 14"W Low NOx Downflow/Horizontal GD9S800403AX

GR9S80 / GD9S80 Specification Sheets

GR9S80 / GD9S80 Installation Manual

GR9S80 / GD9S80 Warranty Information

Shipping

We ship freight to the 48 contiguous states, excluding Hawaii and Alaska. Some shipping restrictions may apply. Liftgate services may incur an additional fee, which can be added at checkout.

Order Processing: Orders are processed within 1-3 business days (excluding weekends). Orders placed on Fridays will be processed the next business day. Once shipped, you’ll receive an email confirmation with tracking details. Backordered products may have longer processing times, and we will notify you of any delays.

Arrival of Goods: Freight delivery times depend on the carrier's schedule and routing. Estimated delivery times are provided at checkout. The carrier will contact you to arrange delivery, and you must be present to sign for the shipment.

Damages: Upon delivery, inspect your shipment carefully for any damage or discrepancies. Note any issues on the carrier’s delivery receipt and notify us within 24 hours. Claims made after this timeframe may be denied. Photographic proof is required for processing claims. Report damages or discrepancies immediately at support@hvacstore.com.

Returns: For returns unrelated to damage, contact us at support@hvacstore.com for authorization. Return shipping costs are the customer’s responsibility, and a 20% restocking fee applies. Items must be in original packaging and condition for a refund.

Delivery Receipt: Before signing the delivery receipt, inspect the shipment for any damage. Your signature confirms acceptance of the delivery unless issues are noted.

Policy Updates: Our shipping policy may change, and updates will be communicated via our website or other channels. For any questions, contact The HVAC Store at support@hvacstore.com or call (833) 658-3387.

Reviews

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