Bryant 811SLegacy™ Multi 18-Speed Low NOx 80% Gas Furnace
80%
Single-Stage
18-Speed
Low NOx certified with flexible airflow. The 811S combines clean emissions with 80% efficiency and an 18-speed blower for environmentally-conscious Portland homeowners.
How the Bryant 811S Solves Portland Heating Challenges
Clean emissions with flexible airflow for environmentally-conscious Pacific Northwest homes
Cleaner Air for Portland
The 811S is Low NOx certified, producing significantly lower nitrogen oxide emissions than standard 80% furnaces. Perfect for environmentally-conscious Portland homeowners who want to reduce their carbon footprint without paying for high-efficiency equipment.
Reduce NOx emissions that contribute to smog and air pollution while maintaining affordable 80% efficiency.
Flexible Airflow for Portland Homes
Portland's diverse home styles - from Craftsman bungalows to ranch homes - each have unique heating needs. The 811S's 18-speed blower allows installers to precisely match airflow to your home's duct configuration.
Customized comfort settings eliminate hot and cold spots throughout your home.
Affordable Low NOx Option
Want cleaner emissions but don't need 95%+ AFUE efficiency? The 811S delivers Low NOx certification at 80% AFUE, saving $2,000-3,000 compared to ultra-low NOx condensing models like the 935SA.
Get certified low emissions heating without the premium cost of high-efficiency condensing furnaces.
Standard Venting Simplicity
The 811S uses traditional B-vent metal flue - the same venting as older furnaces. No expensive PVC piping modifications or condensate drain installations required for Portland home retrofits.
Lower installation costs with compatibility for existing chimney venting systems.
Bryant 811S Key Features
Low NOx Certification
Reduced nitrogen oxide emissions for cleaner combustion and better air quality.
18-Speed Multi-Speed Blower
Flexible 18 discrete speed settings provide customizable airflow during installation.
80% AFUE Efficiency
Solid efficiency provides significant savings over older furnaces at an affordable price.
Single-Stage Gas Valve
Proven on/off operation with simple, reliable components for easy serviceability.
Standard Metal Venting
Uses Category I B-vent metal flue - compatible with existing chimney systems.
Durable Construction
Aluminized steel heat exchanger backed by 20-year warranty for long-term reliability.
Technical Specifications
| Model Number | 811S |
| Efficiency (AFUE) | 80% |
| Gas Valve Type | Single-Stage |
| Blower Motor | 18-Speed Multi-Speed PSC |
| Heating Capacity | 40,000 - 120,000 BTU/h |
| Fuel Type | Natural Gas / LP Convertible |
| Ignition | Hot Surface Ignition |
| Venting | Category I Metal B-Vent |
| Heat Exchanger | Aluminized Steel |
| Emissions | Low NOx Certified |
Industry-Leading Warranty
Premium protection for premium equipment
- 20-Year Heat Exchanger - Aluminized steel heat exchanger covered for 20 years
- 10-Year Parts - All functional parts covered for 10 years
- Requires installation by Factory Authorized Dealer
- Product registration within 90 days required
Product Documentation
Official Bryant resources
Access the latest brochures, owner's manuals, installation guides, and warranty information directly from Bryant:
View Official DocumentsOpens Bryant.com - Always up-to-date documentation
Annual Savings vs. Older Furnaces
*Based on Portland average of 2,000 heating hours, $1.30/therm NW Natural gas. Actual savings vary.
Bryant 811S Installation Throughout Portland Metro
Factory Authorized installation, repair, and maintenance service
Central Portland
Downtown, Pearl District, NW, NE, SE Portland, Sellwood, St. Johns
West Side
Beaverton, Tigard, Lake Oswego, West Linn, Hillsboro, Tualatin
East Side
Gresham, Happy Valley, Milwaukie, Oregon City, Clackamas
What Portland Homeowners Say
See why customers trust us for Bryant furnace installation
Frequently Asked Questions About the Bryant 811S
What does Low NOx certification mean for the Bryant 811S?
The 811S is certified as a Low NOx furnace, meaning it produces significantly reduced nitrogen oxide (NOx) emissions compared to standard 80% AFUE furnaces. NOx contributes to smog formation and air pollution. While not as strict as Ultra-Low NOx standards (like the 830SA), the 811S's Low NOx certification still represents a substantial emissions reduction. This makes the 811S ideal for environmentally-conscious Portland homeowners who want cleaner combustion without paying premium prices for Ultra-Low NOx or high-efficiency condensing models.
How does the 811S compare to the standard 810S furnace?
The 811S and 810S share the same core specifications - both are 80% AFUE furnaces with 18-speed multi-speed PSC blowers and single-stage gas valves. The key difference is emissions: the 811S has Low NOx certification with reduced nitrogen oxide emissions, while the 810S is a standard emissions model. If you prioritize cleaner air quality and environmental impact, the 811S is worth the slight premium (typically $100-300 more). If budget is the primary concern and standard emissions are acceptable, the 810S delivers identical heating performance.
Is the 811S's 18-speed blower beneficial for Portland homes?
Yes, the 811S's 18-speed blower is particularly valuable for Portland's diverse housing stock. Whether you have a vintage Craftsman with original ductwork, a 1970s ranch with additions, or a split-level with challenging airflow, the 18 discrete speed settings allow your installer to optimize airflow during installation. This flexibility helps eliminate hot and cold spots, reduces noise, and ensures proper air distribution throughout your home. Once set to the optimal speed, the blower maintains consistent airflow for reliable comfort.
Ready to Install Your Bryant 811S?
Get a free in-home estimate for Low NOx certified heating with 18-speed comfort
Energy Trust of Oregon rebates available + Federal Tax Credits