BRYANT Legacy Line 80% AFUE 70,000 BTU Single Stage Multi-Position Gas Furnace 17.5″ Wide 800SB48070M17

The Bryant 800SB48070M17 is a reliable, efficient non-condensing gas furnace from the Legacy Line. It delivers dependable heating with quiet operation, flexible installation options, and modern control features suitable for residential applications.

Key Features

• Single-stage gas valve for straightforward, reliable heating performance
• Multi 18-speed constant torque (MCT) ECM blower motor for precise airflow control and improved efficiency
• QuieTech™ noise reduction system for quiet induced-draft operation
• Microprocessor-based “smart” control center with enhanced diagnostics (easy-to-read 3-digit display for faults and status)
• Perfect Light™ (or PerfectLight™) hot surface igniter
• Adjustable heating air temperature rise
• Patented blocked-vent safeguard
• Inner blower door for tighter sealing in sensitive applications
• On-board NFC antenna for simplified setup via the Bryant service technician app
• 4-way multipoise design supporting upflow, downflow, and horizontal installations with multiple venting options (including through-the-furnace downflow venting)

Benefits

• Quiet, comfortable heating with reduced operational noise
• Flexible installation that fits a wide range of home configurations and tight spaces
• Energy-efficient blower motor that helps lower electricity use compared to traditional PSC motors
• Easier service and troubleshooting thanks to clear diagnostics and NFC setup capability
• Proven Bryant reliability with strong warranty coverage (typically 10-year parts limited warranty and 20-year heat exchanger limited warranty when registered on time; standard terms apply if not registered)
• Compatible with Hybrid Heat® dual-fuel systems when paired with a heat pump

Dimensions

• Width (cabinet): 17.5 inches
• Depth/Length: 29 inches
• Height: 33.25 inches (approximately 33-1/3 inches)
• Shipping/Operating Weight: approximately 131 lbs

Specifications

• AFUE: 80%
• Heating Input: 66,000–70,000 BTU/h (nominal 70,000 BTU/h; exact rating typically 66,000 BTU/h certified)
• Heating Output: approximately 54,000 BTU/h
• Cooling Capacity / Airflow: 1,600 CFM nominal (supports up to ~4-ton cooling applications depending on static pressure and setup)
• Heating CFM: approximately 1,310 CFM
• Blower Motor: 3/4 HP, 18-speed constant-torque ECM; blower wheel 11″ diameter × 8″ width
• Configuration: 4-way multipoise (multi-position)
• Fuel Type: Natural gas (factory shipped); convertible to propane with approved kit
• Ignition: Hot surface (HSI)
• Electrical: 115 VAC, 60 Hz, single-phase; maximum overcurrent protection 15 A
• Gas Connection: 1/2″ NPT
• Color: Taupe
• Country of Origin: USA
• Energy Star Rated: No
• Not designed for mobile homes, trailers, or recreational vehicles

Compatibility

• Natural gas or propane (with conversion kit)
• Standard 24V thermostats and many smart/Wi-Fi thermostats
• Hybrid Heat® dual-fuel systems (gas furnace + heat pump)
• Compatible with common Bryant/Carrier evaporator coils and accessories (filter racks, return-air bases, vent extensions, coil adapter kits, chimney adapter kits, etc.)
• Suitable for Category I venting applications

This model offers solid value for homeowners seeking reliable 80% efficiency heating with modern blower technology and installation flexibility. Always consult a licensed HVAC professional for proper sizing, installation, venting, and local code compliance.