BOSCH (BGH97 Series) 97% AFUE 80,000 BTU Two-Stage Upflow/Horizontal Gas Furnace BGH97M080B3

The Bosch BGH97M080B3 is a high-efficiency residential condensing gas furnace designed for reliable, quiet heating and seamless dual-fuel operation. It delivers up to 97% AFUE efficiency (ENERGY STAR certified), converting nearly all fuel into usable heat while supporting modern low-GWP R-454B systems when paired with compatible Bosch IDS heat pumps and coils. The multipoise design and compact B-cabinet make it ideal for replacements or new installs in tight spaces.

Key Features

• Up to 97% AFUE heating efficiency, ENERGY STAR rated
• Two-stage gas valve for better comfort and efficiency (high/low fire operation)
• Constant-airflow ECM multi-speed blower motor (5 selectable speeds) for quiet, efficient airflow
• 3-way multipoise design: upflow (left or right return) or horizontal (left or right discharge)
• Durable aluminized-steel tubular primary heat exchanger + stainless-steel secondary heat exchanger
• Hot-surface ignition
• Field-convertible from natural gas to propane (LP conversion kit included as standard)
• LED fault diagnostics for easier service
• Fully insulated, low-profile painted galvanized steel cabinet (anti-rust coating; passes 500-hour salt-spray test)
• Left- or right-hand gas and electrical connections
• Compatible with Bosch Connected Control thermostats (e.g., BCC series) and standard 24VAC thermostats
• Designed for dual-fuel systems with Bosch IDS heat pumps (up to ~18.5 SEER2 / 9.5 HSPF2 in matched systems) and Bosch BMAC low-GWP cased coils

Benefits

• Lower energy bills through high AFUE and two-stage operation that runs on low fire most of the time for steadier temperatures and less cycling
• Quieter operation and more consistent airflow from the ECM blower
• Flexible installation options reduce labor and fit challenges in existing homes or tight mechanical rooms
• Future-ready for dual-fuel setups that switch between heat pump and gas furnace for optimal year-round efficiency and comfort
• Long-term reliability with robust heat exchangers and strong warranty coverage
• Easy maintenance via LED diagnostics and standard conversion kit

Dimensions & Weight

• Cabinet width (B cabinet): 17.5 in (445 mm)
• Depth × Height: approximately 28.5–28.75 in × 33.75 in (≈28-1/2″ × 33-3/4″)
• Supply-air opening width: ~16 in
• Return-air opening width: ~15-7/8 in
• Shipping/net weight: typically ~152–168 lbs (varies slightly by source; net around 139–152 lbs)

(Exact measurements can vary slightly by revision; always verify with current installation documentation.)

Specifications

• Input (high fire): 80,000 BTU/h (natural gas or propane)
• Input (low fire): ~52,000 BTU/h
• Output (high fire): ~76,000–77,600 BTU/h
• Output (low fire): ~50,440 BTU/h
• AFUE: 97%
• Stages: 2
• Blower: ECM, 5 speeds, rated ~1,050 RPM
• Cooling capacity support: 1.5 / 2 / 2.5 / 3 tons @ 0.5″ ESP
• Power supply: 115 V / 60 Hz / 1-phase
• Max overcurrent protection: typically 15–20 A
• Gas connection: 1/2″ NPT
• Venting: Condensing (typically 2″/3″ PVC or approved plastic; check local codes and manual)
• Air temperature rise: ~35–65°F
• Max outlet air temperature: 170°F
• Warranty (residential, typical): 5-year parts (upgradable to 10 years with registration) and 20-year heat exchanger (upgradable to lifetime with registration); confirm current terms

Compatibility

• Natural gas or propane (conversion kit included)
• Bosch IDS (Inverter Ducted Split) heat pumps and BMAC cased coils for dual-fuel / low-GWP R-454B systems
• Standard 24VAC thermostats and Bosch Connected Control thermostats
• Suitable for residential upflow or horizontal applications
• Note: Not approved for sale/installation in certain California air districts (South Coast AQMD / San Joaquin Valley)

This model is well-suited for homeowners seeking high efficiency, quiet operation, installation flexibility, and strong dual-fuel performance with Bosch systems. Always consult the official Bosch installation manual, local codes, and a qualified HVAC professional for sizing, venting, and installation. Specifications can vary slightly by exact revision (A/C suffix) or region.