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Quick specs
Brand
Goodman
BTU Input
80,000 BTU/h
BTU Output
64,000 BTU/h
AFUE
80%
Heating Stages
Single-Stage
Blower Motor
3/4 HP 9-Speed ECM
Cabinet Width
21"
Airflow Configuration
Upflow/Horizontal
Max Cooling Airflow
5 Tons (Available AC @ 0.5" ESP)
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
Goodman 80% AFUE 80,000 BTU Single-Stage 9-Speed ECM Gas Furnace (Upflow/Horizontal) GR9S800805CN
Goodman GR9S80 Series·80,000 input / ~64,000 output BTU, 80% AFUE
$1,846.80
-
- Free shipping — most items ship by the next day
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
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Goodman 80% AFUE 80,000 BTU Single-Stage 9-Speed ECM Gas Furnace (Upflow/Horizontal) GR9S800805CN
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
In stock
In most items, small items ship same day. Complete systems ship next business day.
$1,846.80
-
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
Quick specs
Brand
Goodman
BTU Input
80,000 BTU/h
BTU Output
64,000 BTU/h
AFUE
80%
Heating Stages
Single-Stage
Blower Motor
3/4 HP 9-Speed ECM
Cabinet Width
21"
Airflow Configuration
Upflow/Horizontal
Max Cooling Airflow
5 Tons (Available AC @ 0.5" ESP)
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
The Goodman GR9S800805CN is a reliable, value-focused residential gas furnace designed for efficient heating in medium-sized homes. It delivers 80,000 BTU input (approximately 64,000 BTU output) at 80% AFUE, using a single-stage gas valve and a high-efficiency 9-speed ECM blower motor. This Goodman model supports upflow or horizontal (left/right) installation and is R-32 refrigerant-ready for modern cooling system pairings. It offers quiet operation, durable construction, and flexible installation options at a competitive price point.
Key Features
- Heavy-duty aluminized-steel dual-diameter tubular heat exchanger for efficient heat transfer and long life.
- Single-stage gas valve with durable silicon nitride (hot-surface) igniter.
- 9-speed ECM multi-speed blower motor (¾ HP, ~1,075 RPM) for quieter, more efficient airflow and better comfort control; continuous fan option available.
- Quiet single-speed draft inducer.
- Self-diagnostic control board with constant memory and fault-code LED for easier troubleshooting.
- Color-coded low-voltage terminals and provisions for electronic air cleaners and humidifiers.
- Heavy-gauge steel cabinet with durable baked-enamel finish and foil-faced insulated heat exchanger section.
- Left- or right-side gas and electrical connections for installation flexibility.
- Natural gas from the factory (convertible to LP/propane with optional kit).
- R-32 ready (with on-board refrigerant detection system support; compatible with R-410A systems as well).
Benefits
- Energy efficiency & lower operating costs: 80% AFUE means 80% of the fuel energy heats your home; the ECM motor uses less electricity than traditional multi-speed PSC motors while providing precise airflow.
- Quiet, consistent comfort: Low-sound design and multiple blower speeds reduce temperature swings and noise compared with single-speed units.
- Reliable, long-lasting performance: Robust heat exchanger, long-life igniter, and self-diagnostics help minimize downtime.
- Installation flexibility: Multi-position (upflow/horizontal) design fits basements, closets, attics, or crawlspaces; side connections simplify piping and wiring.
- Future-ready: R-32 compatibility supports newer, lower-GWP air conditioning systems.
- Strong warranty protection: Limited lifetime heat exchanger warranty and 10-year limited parts warranty (with online registration within 60 days of installation; terms vary by location).
Specifications
| Specification | Details |
|---|---|
| Model | GR9S800805CN (GR9S80 series, C-cabinet) |
| Heating Input | 80,000 BTU/h |
| Heating Output | ~64,000 BTU/h |
| AFUE | 80% |
| Stages | Single-stage |
| Blower | 9-speed ECM, ¾ HP, 10″ × 10″ |
| Max Airflow | Up to ~2,000 CFM (cooling compatibility up to 5 tons @ 0.5″ ESP) |
| Fuel | Natural gas (LP convertible) |
| Electrical | 115 V, 1-phase, 60 Hz; Min. circuit ampacity 11.3 A; Max. overcurrent protection 15 A |
| Vent | 4″ metal chimney/vent |
| Temperature Rise | 35–65°F |
| Burners | 4 |
| Weight | ~132 lbs |
| AHRI # | 215358059 |
| Certifications | AHRI Certified, ETL Listed |
Note: Not Energy Star rated. Standard (non-Low NOx) model; not for use in certain California districts requiring Ultra-Low NOx. Altitude adjustment may be needed above 4,500 ft.
Dimensions
- Width: 21 inches
- Depth: 28 inches
- Height: 33⅜ inches (33.375″)
- Cabinet size: C
- Supply air opening approx. 19½” × 19½”; side return options available.
Compatibility
- Installation positions: Upflow or horizontal left/right.
- Cooling systems: Compatible with up to 5-ton Goodman air conditioners or heat pumps (R-32 primary; also supports R-410A and related coils). Multi-stage outdoor units supported.
- Accessories: Electronic air cleaners, humidifiers, LP conversion kit, high-altitude kits, matching evaporator coils, and thermostats.
- Venting: Standard metal flue (chimney vent).
- Not mobile-home rated. Professional installation required; follow local codes and manufacturer instructions.
This Goodman furnace balances efficiency, quiet operation, and value for homeowners seeking a dependable heating solution that pairs easily with modern cooling systems. Always have a licensed HVAC technician size and install the unit for optimal performance and safety.
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Help when you need it
Not sure if this is the right part? Call us at (888) 292-0874 and we’ll help you find the correct replacement.
Key features
- Goodman GR9S80 Series — reliable, value-focused natural gas furnace
- 80,000 input / ~64,000 output BTU, 80% AFUE — single-stage gas valve
- 9-Speed ECM Blower — quiet, efficient airflow
- Upflow/Horizontal Install — flexible installation
Dimensions
Height 33 3/8 in.
Width 21 in.
Length 28 in.
Weight 132 lbs.
Customer reviews
What buyers are saying
Verified reviews from customers who purchased this product.
5.0
11 verified reviews
JB
James B
The Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace provides incredible heating performance with efficiency that keeps energy costs low. With its solid build and smooth operation, this furnace is a fantastic investment for long-lasting home comfort at an unbeatable price.
RF
Robert F
I couldn’t believe the quality and performance of the Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace (21″ Wide) at such a fantastic price! It heats my home flawlessly, runs quietly, and is an incredible value for anyone in need of reliable
HR
Hudson R
I am blown away by the Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace—it delivers exceptional performance at an incredible price! It heats my home efficiently and consistently, offering both comfort and energy savings like never before.
GT
Greg T
The Goodman 80% AFUE 80,000 BTU Single Stage Gas Furnace is a powerhouse in a 21-inch wide package, delivering consistent warmth across my entire home. Its energy efficiency and budget-friendly price make it an unbeatable choice for anyone looking for reliable heating without breaking the bank.
CG
Cayson G
I just got the Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace (21″ Wide), and I’m beyond impressed with the unbeatable price, exceptional equipment quality, and stellar performance—truly a heating game-changer!
B
Benedict
Prepare to be astounded by the Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace (21″ Wide)! This marvel not only comes at an unbeatable price, but its expansive width ensures exceptional performance, delivering warmth and comfort that exceeds all expectations.
J
John
I recently invested in the Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace (21″ Wide), and I’m thrilled with the fantastic price I paid for such a powerful and efficient heating solution. The furnace’s broader design not only fits seamlessly into my space but also its single-stage performance ensures exceptional warmth, making it a standout choice in terms of affordability and top-tier functionality.
K
Kevin
Goodman’s 80% AFUE 80,000 BTU Single Stage Gas Furnace is an absolute game-changer for home heating! The surprisingly affordable price, coupled with the furnace’s efficient performance and wide adaptability for upflow or horizontal installation, makes it a top-notch choice that exceeds expectations. Get ready to be wowed by its heating prowess and the extra savings it brings to your utility bills.
I
Ian
The Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace (21″ Wide) has exceeded my expectations, providing reliable and efficient heating at an unbeatable price! Its compact design and powerful performance make it a fantastic choice for home comfort, and the affordability is truly remarkable for the high-quality equipment you receive.
T
Teddy
The Goodman 80% AFUE 80,000 BTU Single Stage Upflow/Horizontal Gas Furnace (21″ Wide) is a game-changer in home heating! The fantastic price, combined with its powerful performance and efficient design, makes it an exhilarating purchase that brings warmth and savings into your home.
B
Billy
This Goodman 80% AFUE 80,000 BTU Gas Furnace is an absolute powerhouse for home heating! The price for such a high-capacity and reliable furnace in a 21″ width is surprisingly affordable, and its exceptional performance in warming my space left me thoroughly impressed. For anyone seeking top-notch heating without compromising on value, this furnace is a remarkable choice!
