Trane S8B1 Gas Furnace – 66000 BTU, 80% AFUE, Single-Stage, Multi-Position | S8B1C080M5PS

If you are looking for an exact replacement Trane furnace for a mid-sized home, the Trane S8B1 (model S8B1C080M5PS) is a rock-solid choice. This 66,000 BTU, 80% AFUE single-stage gas furnace is built for houses in the 1,000 to 1,600 square foot range. When you check the Trane S8B1C080M5PS cost with Green Leaf Air, you get clear, upfront pricing from local professionals who know this equipment.

Inside the unit, a silicon nitride hot surface igniter handles the startup. This gives you a fast and reliable ignition every time your thermostat calls for heat, skipping the early burnouts you see with older igniter styles. The multi-port in-shot burners shape the flame directly into the heat exchanger for complete combustion. It pulls more usable heat out of every cubic foot of natural gas and cuts down on what gets wasted out the flue.

This single-stage furnace uses Trane’s 21-inch wide C-cabinet. It installs in four different positions (upflow, downflow, horizontal left, or horizontal right), so it fits easily into a wide range of utility rooms without needing major modifications. The heavy insulated steel cabinet traps the operating noise at the source and keeps the internal parts protected from long-term wear. Whether it is running heat in the winter or circulating air from your outdoor AC unit during the summer, the Vortica II blower and high-efficiency ECM motor move air quietly. This combination draws much less electricity than a standard motor, helping lower your overall energy bills across the year.

Features of Trane S8B1 80% AFUE 66,000 BTU Single-Stage Gas Furnace S8B1C080M5PS

• Multi-Port In-Shot Burners fire directly into the heat exchanger and shape the flame cone for complete combustion, which means more heat extracted per cubic foot of gas and less waste out the flue
• Formed Steel Door with Smoked Acrylic View Windows gives you a clean, finished look and lets you visually check the burner flame without pulling the cabinet apart
• High-Efficiency ECM (Electronically Commutated Motor) uses up to 75% less electricity than a standard blower motor and maintains consistent airflow across different static pressure conditions, so your system works well even with older ductwork
• Patented Vortica II Blower is quieter than conventional blower housings at the same airflow rates and stays efficient during both heating and cooling seasons when paired with an AC coil
• Aluminized Steel Heat Exchanger handles the high-temperature cycles of single-stage heating without warping or cracking over time, and resists the condensation-related corrosion that shortens the life of thinner exchangers
• Heavy Steel Insulated Cabinet holds heat inside the unit, reduces vibration noise, and protects the internal components from dust infiltration and physical wear
• Silicon Nitride Hot Surface Igniter is more durable than the older silicon carbide igniters that typically fail within a few years; this material handles thermal cycling far better and gives you a reliably fast startup season after season

Specifications of Trane S8B1 Single-Stage 66000 BTUh 80% AFUE Upflow/Horizontal Gas Furnace S8B1C080M5PS

What you need to know before ordering:

All 80% AFUE furnaces like this one require single-pipe metal flue venting. If your existing venting is PVC or plastic, you would need a 90%+ condensing furnace instead. If you’re unsure which applies to your current setup, call us at (972) 992-5006 before ordering and we’ll confirm the right fit.

To keep Trane’s 10-year parts warranty and 20-year heat exchanger warranty intact, the unit must be installed by a licensed HVAC contractor and registered with Trane within 60 days of installation. We can help with licensed installation across Dallas, McKinney, Plano, Frisco, Houston, and Raleigh. Financing is also available for qualified buyers.