The best gas furnace for dependable heating is one that matches your home’s heating load, venting, installation orientation, and local code requirements. These five models offer different combinations of AFUE efficiency, staging, airflow, and capacity. The Goodman 96% AFUE two-stage model is a fit for buyers seeking high efficiency with a smaller listed capacity; the 80% Goodman is a simpler option where its venting and efficiency profile make sense. Product information alone cannot establish long-term reliability, so compare specifications and have a qualified HVAC professional confirm the match.
| Product | Best suited for | Key listed feature |
|---|---|---|
| Goodman GR9T960603BN | High-efficiency heating at 60,000 BTU | 96% AFUE, two-stage |
| Goodman GR9S920803BN | 80,000 BTU capacity and higher AFUE | 92% AFUE, single-stage |
| Goodman GR9S800803BN | Buyers considering an 80% AFUE model | Multi-speed ECM motor |
| ACiQ 100000 BTU | Higher listed capacity and flexible fuel choice | 92% AFUE, nine-speed ECM |
| Goodman GR9T961205DN | High listed capacity and two-stage operation | 96% AFUE, 120,000 BTU |
Goodman GR9T960603BN 96% AFUE
This Goodman is a 60,000 BTU, 96% AFUE natural gas furnace with two-stage heating and a multi-speed ECM motor. Its listed cabinet width is 17.5 inches, and the product information specifies upflow or horizontal installation. The listing also gives 1,200 CFM and 115-volt, single-phase electrical service.
Best for: Buyers whose heating-load assessment calls for a 60,000 BTU unit and who want a high-efficiency, two-stage model. Two-stage operation provides different heating levels, while the ECM motor offers multiple airflow speeds, according to the product specifications.
Why it stands out: It combines the highest listed AFUE tier in this selection with two-stage operation in a relatively narrow cabinet. Those details make it a useful comparison point for homeowners weighing efficiency, staging, and available installation space.
Check before choosing: Confirm the required capacity, installation orientation, venting, and cabinet clearance with an HVAC professional. The listed specifications do not establish that this model fits every home or that it will be more reliable than other furnaces.
Goodman GR9S920803BN 92% AFUE
This Goodman is an 80,000 BTU, 92% AFUE, single-stage natural gas furnace for upflow or horizontal installation. The product name identifies a 17.5-inch cabinet and a multi-speed design. Its listed feature is a 10-year limited parts warranty, provided a qualified installer completes the installation and the unit is registered online within 60 days of installation.
Best for: Buyers seeking an 80,000 BTU furnace with higher listed efficiency than an 80% AFUE option, while keeping to single-stage operation. It may be worth comparing when the home’s calculated heating load and duct configuration suit this capacity.
Why it stands out: The stated warranty conditions give buyers concrete registration and installation requirements to verify. Its upflow/horizontal orientation and 17.5-inch width are also useful details when checking a replacement installation.
Check before choosing: The warranty depends on qualified installation and timely online registration. Confirm the complete warranty terms and regional eligibility with the seller or manufacturer; the supplied listing does not specify every condition.
Goodman GR9S800803BN 80% AFUE
This 80,000 BTU Goodman is rated at 80% efficiency and has a multi-speed ECM motor. It is designed for upflow or horizontal installation, has a 17.5-inch cabinet, and is described as R32 ready. The listing says the ECM motor provides airflow control and can reduce noise; actual results depend on system design and installation.
Best for: Buyers comparing an 80% AFUE furnace with a multi-speed motor, provided the model meets local requirements and suits the home’s existing configuration. It can be considered where the buyer prioritizes the listed airflow-control feature over a higher AFUE rating.
Why it stands out: The product information identifies older model numbers it replaces and clearly specifies its permitted installation orientations. That can help when comparing a replacement, but the exact application still needs professional verification.
Check before choosing: This model cannot be installed as a downflow furnace. The listing directs buyers who need downflow installation to look for models beginning with GD9. Its 80% AFUE rating is also lower than the 92% and 96% models in this comparison.
ACiQ 100,000 BTU 92% AFUE Furnace
This ACiQ furnace is listed at 100,000 BTU and 92% AFUE, with a 21-inch cabinet and upflow/horizontal orientation. Its features include a single-stage, nine-speed ECM design and 2,000 CFM. The product listing describes it as suitable for natural or propane gas and says it requires plastic/PVC flue venting.
Best for: Buyers whose professional load calculation calls for a higher-capacity furnace and who want to compare a nine-speed ECM motor. The stated natural-or-propane fuel flexibility may also be relevant, but the installer must confirm the correct configuration and requirements.
Why it stands out: It has the highest listed airflow and a larger stated capacity than the other single-stage options here. The listing also specifies its venting type, a detail to evaluate before selecting a replacement.
Check before choosing: The listing says the model complies with California and Colorado Low NOx rules but not Ultra-Low NOx regulations. Verify current local emissions requirements and venting suitability before purchase.
Goodman GR9T961205DN 96% AFUE
This Goodman is a 120,000 BTU, 96% AFUE furnace with two-stage heating and a multi-speed ECM motor. Its cabinet is listed as 24.5 inches wide. The product information specifies upflow or horizontal installation and says it cannot be installed as a downflow model.
Best for: Buyers whose heating-load calculation calls for a 120,000 BTU furnace and who are comparing high-AFUE, two-stage models. Its larger stated capacity makes professional sizing especially important; a larger furnace is not automatically a better match.
Why it stands out: It pairs a 96% AFUE rating with two-stage operation and a multi-speed ECM motor. The listed cabinet width and orientation requirements are important comparison points for replacement planning.
Check before choosing: The 24.5-inch cabinet may not fit every installation space, and the model is not for downflow installation. Confirm clearances, ductwork, venting, and capacity with a qualified professional.
Buying Guide: How to Choose a Reliable Gas Furnace
What does reliability mean when comparing furnaces?
Reliability is not established by AFUE alone. A furnace’s suitability depends on correct sizing, proper installation, compatible ductwork and venting, and required maintenance. Product listings can help compare specifications, but they do not prove expected service life or failure rates. Ask the installer to explain the selected model’s service requirements and provide the full manufacturer documentation.
How should you compare AFUE ratings?
AFUE describes how efficiently a furnace converts fuel into heat over a season. Among these options, the listed ratings range from 80% to 96%. A higher AFUE rating can mean less fuel is lost during operation, but it does not by itself determine operating cost. Local fuel prices, climate, usage, installation quality, and the home’s heat loss all matter.
Compare the Goodman 80% model with the 92% and 96% options in context. Ask an HVAC professional to estimate how the efficiency difference applies to your home rather than choosing based only on the rating.
Should you choose single-stage or two-stage heating?
A single-stage furnace operates at one heating level. A two-stage model has two heating levels, as stated for the Goodman 96% AFUE models in this selection. Staging affects how the system delivers heat, but the product details here do not provide enough information to predict comfort in a particular home. Compare the furnace and thermostat setup with a professional.
How much furnace capacity does your home need?
Do not select a furnace by square footage alone or assume that a higher BTU rating is better. These products range from 60,000 to 120,000 BTU. A qualified contractor should calculate the home’s heating load and account for insulation, windows, air leakage, climate, and duct performance. An incorrectly sized furnace may not meet the home’s needs as intended.
Why do cabinet size and installation orientation matter?
Check the available equipment space and whether the application requires upflow, horizontal, or downflow installation. Several listed models support upflow or horizontal installation but explicitly exclude downflow. Cabinet widths also differ: the selected Goodman models list widths of 17.5 or 24.5 inches, while the ACiQ listing gives 21 inches. Verify dimensions and service clearances before ordering.
What should you verify about venting, fuel, and local rules?
Venting requirements differ by model. The ACiQ listing specifies plastic/PVC flue venting and identifies natural or propane fuel use. Confirm the exact installation instructions and whether any conversion or configuration is required. Also check local emissions rules: the ACiQ listing says it meets California and Colorado Low NOx requirements, but not Ultra-Low NOx rules. Requirements can vary by location.
How should you compare warranty information?
Review the complete warranty document before buying. For the Goodman GR9S920803BN, the supplied information states that a 10-year limited parts warranty requires installation by a qualified installer and online registration within 60 days. Confirm eligibility, exclusions, coverage start date, and registration steps with the seller or manufacturer. Do not assume that another model has the same coverage.
Frequently Asked Questions
Which furnace in this comparison has the highest listed AFUE?
The Goodman GR9T960603BN and Goodman GR9T961205DN are both listed at 96% AFUE. Their stated capacities differ substantially, so the right choice depends on a professional heating-load assessment.
Which listed furnace has the lowest AFUE?
The Goodman GR9S800803BN is listed at 80% AFUE. Compare that rating with local requirements, installation conditions, and the higher-efficiency options before deciding.
Can these furnaces be installed as downflow models?
The Goodman GR9S800803BN and GR9T961205DN listings explicitly say they cannot be installed as downflow furnaces. Confirm orientation requirements for any model with the manufacturer and installer before purchase.
Does a 96% AFUE furnace guarantee lower heating bills?
No. AFUE is an efficiency rating, not a guarantee of a particular bill. Fuel costs, weather, thermostat settings, home insulation, equipment sizing, and installation affect actual energy use.
What is the most important step before ordering a gas furnace?
Have a qualified HVAC professional confirm the heating load, fuel configuration, venting, installation orientation, electrical requirements, clearances, and local code compliance. These checks help ensure the selected model is appropriate for the home.