When you need a direct replacement furnace, the Trane S8B1 (model S8B1B080M4PS) is an excellent choice that simply gets the job done. We provide clear, upfront pricing so you can order this 64,000 BTU single-stage gas furnace online with confidence, knowing it is in stock. This 80% AFUE unit delivers affordable, reliable heat without the steep cost of higher-tier systems. It is the perfect fit for a straightforward swap and a budget-minded upgrade.
Inside, the silicon nitride hot surface igniter is built to handle years of daily starts without failing. The multi-port in-shot burners shape a tight, clean flame that pulls more usable heat from every cubic foot of natural gas. Together, they create a proven combustion system that keeps your energy bills down and your house warm through the coldest winter stretches.
The equipment is housed in a heavy insulated steel cabinet to lock in heat and block out operating sound. The Vortica II blower and its efficient ECM motor work together to push warm air quietly through your ducts. During the summer, that same blower partners effortlessly with your outdoor AC unit to circulate cool air throughout your home. You get even, consistent comfort without the sudden blasts or noisy rumble of older units, all while drawing much less electricity than a standard motor.
Features of Trane S8B1 80% AFUE 64000 BTU Single-Stage Gas Furnace S8B1B080M4PS
- Multi-Port In-Shot Burners produce a stable, focused flame that maximizes heat output from the fuel consumed, lowering your monthly gas bill compared to an outdated furnace.
- Formed Steel Door with Smoked Acrylic View Windows gives a clean, modern look and lets you visually check burner operation without opening the cabinet.
- High-efficiency Electronically Commutated Motor (ECM) adjusts to duct conditions, reducing electrical consumption and providing steadier airflow than a standard PSC motor.
- Patented Vortica® II Blower moves air with less noise and turbulence, making the system efficient and unobtrusive in a closet, basement, or utility room.
- Aluminized Steel Heat Exchanger resists corrosion and transfers heat effectively, extending the life of the core component and maintaining strong performance season after season.
- Heavy Steel Insulated Cabinet provides durability and sound deadening, so the furnace operates quietly and stays protected from bumps and debris.
- Silicon Nitride Hot Surface Igniter offers reliable, efficient ignition without a standing pilot, contributing to lower gas usage and fewer service calls over the life of the furnace.
Specifications of Trane S8B1 Single-Stage 64000 BTUh 80% AFUE Upflow/Horizontal Gas Furnace S8B1B080M4PS
Gas Furnace Specifications | |
| Brand | Trane |
| Series | S8B1 Series |
| Model | S8B1B080M4PS |
| Capacity | 64000 BTUh |
| AFUE | 80% |
| Stages | Single Stage |
| Dimension | 34” x 17.5” x 28.75” |
| ENERGY STAR® qualified | No |


Mateo (verified owner) –
Quick installation and works flawlessly.
Dylan (verified owner) –
Very well worth the money.
Isaac (verified owner) –
Great performance and very easy to use.
Paul (verified owner) –
Great value—cooling is fast and even.
Riley (verified owner) –
Reliable and keeps the whole house comfortable.
Robert (verified owner) –
Good quality.