Newer Trane 80% Furnace Model Number Description

The model number description information in this blog is for the new Trane 80% S-series S8B1 furnace manufactured beginning in March 2019.

Accurate Heating & Cooling services and installs Trane furnaces and air conditioners for residential and light commercial locations in Omaha. Also, we serve Elkhorn, La Vista, Papillion, Bellevue, Council Bluffs, Blair, Valley, Waterloo, Ralston, and other areas within the greater Omaha metropolitan area. We have an A+ rating with the Better Business Bureau and have been in business since 1998. Then give us a call today and we can service or replace your current HVAC equipment.

Newer Trane 80% Furnace Model Number Description found inside furnace cabilet

Applicable Furnace Model Numbers

The newer Trane 80% furnace model number descriptions in this blog is applicable to the following Trane 80% furnaces.

NOTE: This information has not been certified by the manufacturer. ENSURE that you verify all of this model number information with the manufacturer before using this information to make equipment selection or repair decisions.










Decoding the Trane 80% Furnace Model Number Description

The above Trane furnace model numbers can be decoded to reveal specific technical information about the furnaces. Specifically, this is based on the model number. The guide below shows the breakdown of the model number descriptions.

Model Number:   S  8  B  1  D  120  M   5    P   S     A    A

Position:              1, 2,  3, 4, 5, 6 – 8, 9, 10, 11, 12,  13,  14,   15

Position     Description

  1. S equals S-series
  2. AFUE: 8 = 80%
  3. Blower Type: B = Constant Torque
  4. Gas Valve Stages: 1 = single
  5. Cabinet Width: A = 14.5”, B = 17.5”, C – 21”, D = 24.5”
  6. BTU Input in thousands
  7. BTU Input in thousands
  8. BTU Input in thousands
  9. Poise Options: M = Multipoise / 4 way
  10. Air Capacity for Cooling in Nominal Tonnage = 2, 3, 4, 5
  11. Inducer Type: P = PSC / Shaded Pole
  12. Communicating Capability: S = 24Volt T = 24 Volt
  13. Major Design Change: A – Z
  14. Minor Design Change A – Z
  15. Revision Service Change A – Z

For additional technical information on the new Trane 80% S-series natural gas furnace, refer to the technical information on the Trane website.

A product brochure for the older Trane 80% furnaces can be found at the link: Trane 80% Furnace Manual XC80, XV80, XL80, XT80, XR80, XB80.

Also, a product brochure for the newer Trane S-series 80% furnaces can be found Trane S-Series Furnace Brochure.

Furnace dimensions for these new Trane S-series 80% furnaces is shown below beyond Trane 80% Furnace Model Number Description

Model                                   Height (inches) Width (inches)  Depth (inches)  Nominal Output (BTU/hr)

S8B1A026M2PSAA           34                           14.5                        28.75                     20,800

S8B1A040M3PSAA           34                           14.5                        28.75                     32,000

S8B1B040M2PSAA           34                           17.5                        28.75                     32,000

S8B1B060M3PSAA           34                           17.5                        28.75                     48,000

S8B1B060M4PSAA           34                           17.5                        28.75                     48,000

S8B1B080M4PSAA           34                           17.5                        28.75                     64,000

S8B1C080M5PSAA           34                           21                           28.75                     64,000

S8B1C100M5PSAA           34                           21                           28.75                     80,000

S8B1D120M5PSAA           34                           24.5                        28.75                     96,000

All of the above listed Trane S-series 80% furnaces have an AFUE (Annual Fuel Utilization Efficiency ratio of 80%. The above furnace dimension data and AFUE rating data are not found on the newer Trane 80% furnace model number description information so this information must be obtained separately.

Furnace Serial Number Can Reveal Furnace Year of Manufacture

There is a handy webpage that shows how to decode HVAC appliance serial numbers to determine the year of manufacture. Go to and select the appliance type, and the letter that the appliance brand begins with. Then locate the brand in question from the drop down menu. And a list will be available with a variety of serial number formats that the particular brand uses. The location of the year embedded in the serial number is identified.

If your current furnace is 15 years old or older and is rated as an 80% furnace, then upgrading to a new Trane S-series 80% furnace will provide noticeable energy savings over your older furnace. This is partly due to the different way that furnace efficiency is rated today versus the way furnace efficiency was rated 15 years ago. In the past, the older furnace efficiency rating was based on bringing the furnace up to normal operating temperature and then measuring the furnace efficiency. The current method of rating the energy efficiency of the furnace is to begin calculating furnace efficiency when the furnace is started. Basically, this is because the furnace does not run as efficient upon initial startup, before the furnace components are at an optimum temperature for optimum combustion efficiency.

Additional Information

For a description of Armstrong furnace model numbers, refer to this blog.

For a good discussion about upgrading your existing standard 1 inch filter to a more efficient 5 inch pleated air filter, refer to this blog.

Information on the description of Trane furnace model numbers can be found here.

For a description of Trane roof top unit model numbers, refer to this blog.

For a description of older Ruud UAKA air conditioner model number decoding, refer to this blog.

To understand how to correct a phase monitor on a Trane roof top unit that is preventing a unit from operating, refer to this blog.

Call Accurate Heating & Cooling today for a free estimate on replacing your older furnace. We are an established HVAC contractor in the Omaha metropolitan area and we have great customer service.

Newer Trane 80% Furnace Model Number Description Accurate Heating & Cooling