Bryant 821SPreferred™ 80 Single-Stage Low NOx Gas Furnace with InteliSense™
80%
Single-Stage
Variable-Speed
Reliable single-stage Low NOx furnace with InteliSense™ remote monitoring delivers cleaner emissions and simpler installation. Perfect for Portland homes prioritizing environmental responsibility with proven technology.
How the Bryant 821S Solves Portland Heating Challenges
Engineered for the Pacific Northwest's unique climate - from long wet winters to environmental concerns
Portland's Long Wet Winters
Portland averages 154 rainy days per year, with temperatures hovering between 35-50°F for months. The 821S delivers reliable warmth with 80% efficiency, while the variable-speed blower adjusts airflow for even temperatures throughout your home.
Consistent heating with excellent airflow control even during Portland's coldest winter days.
Cleaner Air for Portland Families
The 821S's Low NOx burner reduces nitrogen oxide emissions by up to 40% compared to standard furnaces. This contributes to better air quality in the Portland Metro area, where air inversions can trap pollutants during winter months.
Environmentally responsible heating that reduces your home's contribution to Portland's air quality concerns.
Replacement for 60-70% Furnaces
Many Portland homes still have 60-70% AFUE furnaces from the 1980s-1990s. Upgrading to the 821S's 80% AFUE can save $200-400/year on heating bills while providing better comfort with variable-speed airflow and cleaner emissions.
Reliable heating at better efficiency than older single-stage furnaces, with proven non-condensing technology.
No Condensate Drain Required
Non-condensing design means the 821S doesn't produce acidic condensate, simplifying installation in homes without existing condensate drains. This can save $500-1,000 in installation costs compared to high-efficiency condensing models.
Simpler installation with standard metal venting - ideal for direct replacements and retrofit applications.
Bryant 821S Key Features
Single-Stage Gas Valve
Reliable single-stage operation delivers consistent full-capacity heating when needed with proven technology.
Low NOx Burner
Reduces nitrogen oxide emissions by up to 40% compared to standard furnaces - better for air quality and environment.
InteliSense™ Remote Monitoring
Enables your HVAC contractor to remotely monitor system performance, diagnose issues, and schedule maintenance proactively.
Variable-Speed ECM Blower
Electronically commutated motor provides whisper-quiet operation and 50% lower electrical consumption than standard motors.
Non-Condensing Design
Standard metal venting eliminates need for PVC condensate drains - simpler installation and lower retrofit costs.
Aluminized Steel Heat Exchanger
Durable construction with 20-year limited warranty - proven reliability for decades of service.
Technical Specifications
| Model Number | 821S |
| Efficiency (AFUE) | 80% |
| Gas Valve Type | Single-Stage |
| Blower Motor | Variable-Speed ECM |
| Heating Capacity | 40,000 - 120,000 BTU/h |
| Fuel Type | Natural Gas / LP Convertible |
| Ignition | Hot Surface Ignition |
| Venting | Category I - Standard Metal Vent |
| Heat Exchanger | Aluminized Steel |
| Cabinet | DuraGuard Plus™ protection |
| Emissions | Low NOx Certified |
Exceptional Warranty
Long-term protection for reliable 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 821S 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 821S
What is Low NOx technology on the Bryant 821S?
The 821S features a specially designed burner that reduces nitrogen oxide (NOx) emissions by up to 40% compared to standard furnaces. NOx contributes to smog and air quality issues, particularly important in Portland where winter air inversions can trap pollutants. The 821S meets California's strict SCAQMD Rule 1111 for Low NOx emissions, making it an environmentally responsible choice while maintaining reliable single-stage heating performance.
How does the 821S compare to two-stage furnaces for Portland homes?
The 821S uses a single-stage gas valve with a Low NOx burner, paired with a variable-speed ECM blower. While two-stage models provide more gradual temperature control, the 821S's variable-speed blower still delivers even airflow and quiet operation at a lower price point. For Portland's mild winters and environmentally conscious homeowners, the 821S offers excellent value with proven single-stage reliability, cleaner emissions, InteliSense™ monitoring, and simpler installation.
What's the difference between the 821S and 820S models?
Both are 80% AFUE single-stage furnaces with InteliSense™ monitoring and variable-speed ECM blowers. The key difference is emissions: the 821S features a Low NOx burner that reduces nitrogen oxide emissions by up to 40% compared to the standard 820S. If you're environmentally conscious or replacing a furnace in an area with air quality concerns, the 821S offers the same comfort, reliability, and value with significantly cleaner emissions - important for Portland's winter air quality and your environmental impact.
Ready to Install Your Bryant 821S?
Get a free in-home estimate for this environmentally responsible single-stage furnace
Energy Trust of Oregon rebates + Federal Tax Credits may be available