Answering common buyer questions about gas furnaces, this guide highlights reliable upflow/horizontal models ideal for standard homes. The top picks emphasize efficiency, quiet operation, and straightforward installation. Best for homeowners upgrading from older units, newcomers replacing a failed furnace, or those seeking low NOx options for cleaner combustion.
Summary table of selected products:
| Product | Efficiency | Type | Best For | Notes |
|---|---|---|---|---|
| Goodman GR9S800804BN | 80% AFUE | Upflow/Horizontal | Homes needing broader airflow control | Multi-speed ECM; CA not included |
| Goodman GR9S800803BN | 80% AFUE | Upflow/Horizontal | Cost-conscious upgrades | Multi-speed ECM; similar specs to 804BN |
| Goodman GR9T960603BN | 96% AFUE | Upflow/Horizontal | Energy-efficient heating | Two-stage; Low NOx option |
| Goodman GR9S920803BN | 92% AFUE | Upflow/Horizontal | Quiet comfort with efficiency | Single-stage, 80k BTU; limited warranty info |
| Goodman GR9T961004CN | 96% AFUE | Upflow/Horizontal | High-efficiency households | Two-stage; aluminized steel exchanger |
Goodman 80% Upflow/Horizontal — 80,000 BTU (GR9S800804BN)
The GR9S800804BN is an 80% AFUE, single-stage furnace designed for upflow or horizontal installation. It replaces several older Goodman models and is marketed for nationwide installation with CA excluded. The furnace uses a multi-speed ECM motor for better air control, improving heating efficiency and reducing operating noise. Best for homes needing reliable base-load heat with manageable upfront cost.
Who this is best for: homeowners upgrading from older, single-stage units who want improved airflow and quieter operation.
Limitations: cannot be installed as a downflow unit; for downflow, choose GD9 series models.
Goodman 80% Upflow/Horizontal — 80,000 BTU (GR9S800803BN)
GR9S800803BN matches the 804BN in layout and function, with an 80% AFUE rating and multi-speed ECM for enhanced airflow. It is intended for upflow/horizontal installation and removal of older models is supported by the same replacement logic. Excellent for customers prioritizing steady heat delivery with reduced noise.
Who this is best for: buyers needing a straightforward, low-noise upgrade path with solid efficiency.
Limitations: not suitable for downflow installations; refer to GD9 series for downflow options.
Goodman 96% AFUE Two-Stage Upflow/Horizontal — 60k BTU (GR9T960603BN)
This model delivers 96% AFUE with a two-stage operation for more precise temperature control and efficiency, suitable for moderate to large homes. It has a 17.5″ cabinet width and is designed for upflow/horizontal installation. It emphasizes energy savings and quieter heat cycles compared to single-stage furnaces.
Who this is best for: households aiming to maximize year-round efficiency and comfort in larger living spaces.
Caution: verify compatibility with existing ductwork and space before purchasing due to specific install requirements.
Goodman 92% AFUE Single Stage — 80k BTU (GR9S920803BN)
This 92% AFUE single-stage model provides improved efficiency over older 80% systems while keeping a single-stage control scheme. Its 80,000 BTU capacity suits mid-to-large homes with consistent heating needs. It’s an upflow/horizontal unit suitable for replacement installations with compatible ductwork.
Who this is best for: buyers seeking a middle-ground efficiency upgrade without stepping into two-stage technology.
Limitations: lacks two-stage modulation, which may affect comfort in extremely cold conditions compared to multi-stage options.
Goodman 96% AFUE Two Stage — 100k BTU (GR9T961004CN)
GR9T961004CN is a high-efficiency, two-stage furnace with a 96% AFUE rating and aluminized steel primary heat exchanger. It is designed for upflow/horizontal installation and requires attention to installation guidance. The two-stage operation allows for more consistent temperatures and energy savings during variable outdoor temperatures.
Who this is best for: homes in colder climates or buyers prioritizing high efficiency and better comfort with ongoing savings potential.
Limitations: check for confirmation of the GD9-downflow alternative if downflow is needed, as this model is configured for upflow/horizontal only.
Buying Guide
- Efficiency targets: 80% AFUE furnaces are common entry-level options; 90%+ units reduce energy usage but cost more upfront. Consider climate and energy bills when choosing.
- Two-stage vs single-stage: Two-stage furnaces deliver steadier temperatures and quieter operation; single-stage may be adequate for smaller homes or tighter budgets.
- Upflow/Horizontal versus downflow: Confirm your home’s duct configuration. Some models cannot be installed as downflow and require simulations of airflow paths.
- NOx considerations: Low NOx models reduce emissions and may be required in certain jurisdictions. Verify availability for your region.
- Ventilation and air quality: In addition to heating, assess optional features like ECM motors for better airflow and potential compatibility with air purifiers or humidifiers.
- Warranty and serviceability: Look for coverage options and availability of local technicians. Verify installation requirements and online registration if applicable.
- Sizing and space: Ensure the cabinet width and overall dimensions fit the existing enclosure. The common 17.5″ width is a standard footprint in several models.
- Installation considerations: Nationwide installation may be offered, but confirm local permitting and contractor qualifications for installation in your area.
Frequently Asked Questions
- What does AFUE mean? It stands for Annual Fuel Utilization Efficiency, a measure of furnace efficiency. Higher percentages indicate more efficient heat conversion.
- Is a two-stage furnace worth it? For homes with high heating demands or very cold climates, two-stage furnaces offer smoother heating and potential energy savings over time.
- Can these furnaces be installed in any room? Installability depends on duct layout and space. Some models are limited to upflow/horizontal configurations.
- Do these units require special venting? Venting needs depend on model and local codes. Follow manufacturer instructions and local codes during installation.
- What is low NOx? Low NOx furnaces reduce nitrogen oxide emissions, beneficial for air quality and regions with stricter emission standards.
- How do I know which model to choose? Consider climate, home size, existing ductwork, desired efficiency, and budget. A two-stage, higher AFUE unit is typically best for comfort and energy savings in larger homes.