American Standard equipment comes off the same lines as Trane, so its model numbers follow the same logic. The furnace numbers are identical; the outdoor-unit numbers swap in an A for the brand and use different family letters. This guide decodes American Standard furnace and air-conditioner model numbers position by position, using the key American Standard prints on its own product data sheets.
American Standard and Trane are the same company. Silver, Gold and Platinum are the American Standard tier names for what Trane calls XR, XL and XV. For the Trane family names see the Trane model number guide.
Where to Find the American Standard Model Number
On a furnace, the rating plate is inside the front door or on the side of the cabinet, usually a foil or paper label with the model (M/N) and serial (S/N) side by side. On an outdoor AC or heat pump it is on the side of the condenser near the refrigerant line connections. Copy the model number exactly as printed, including dashes: the position of each character is what carries the meaning.
American Standard Furnace Model Number Format
A typical American Standard furnace model number looks like: S9V2B080U4PSAA. Use the table to split it up:
| Position | Characters | Meaning | Example |
|---|---|---|---|
| Series | S | S = current S-series gas furnace (legacy units start with A, e.g. AUD, AUH) | S |
| AFUE family | 9 | 9 = 90%+ condensing; 8 = 80% | 9 (96% AFUE on S9V2) |
| Stages / motor | V2 | V2 = two-stage with variable-speed ECM; X2 = two-stage ECM; X1 = single-stage ECM; B1 = single-stage | V2 |
| Cabinet width | B | B = 17.5 in.; C = 21 in.; D = 24.5 in. | 17.5 in. wide |
| Heating input | 080 | Thousands of BTU/h: 040, 060, 080, 100, 120 | 80,000 BTU/h |
| Airflow direction | U | U = upflow / horizontal; D = downflow | U (upflow) |
| Blower capacity | 4 | Nominal cooling tons the blower supports: 3, 4, 5 | 4 tons |
| Configuration | PS | Manufacturer configuration code (not defined on the product data sheet) | PS |
| Revision | AA | Design revision (AA, BB...) | AA |
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Common American Standard Furnace Families
The first few characters identify the family, and the family tells you the tier, staging and blower before you read a single digit of capacity.
| Model prefix | Family | Stages | Blower | Efficiency |
|---|---|---|---|---|
| S9V2 | Gold / Platinum S9V2 | Two-stage | Variable-speed ECM | 96-97% AFUE |
| S9X2 | Gold S9X2 | Two-stage | Constant-torque ECM | 96% AFUE |
| S9X1 | Silver S9X1 | Single-stage | Constant-torque ECM | 96% AFUE |
| S9B1 | Silver S9B1 | Single-stage | Multi-speed | 96% AFUE |
| S8X1 / S8B1 | Silver 80 families | Single-stage | ECM / multi-speed | 80% AFUE |
| AUD / AUH / ADH | Legacy Freedom 80 / 90 series | Varies | Varies | 80-95% AFUE |
American Standard AC and Heat Pump Model Numbers
Outdoor units use a different string. A typical American Standard air conditioner model number looks like: 4A7A6036A1000A.
| Position | Characters | Meaning | Example |
|---|---|---|---|
| Refrigerant | 4 | 4 = R-410A (2 = R-22 on older units) | 4 |
| Brand | A | A = American Standard; T = Trane | A |
| Product type | 7 | 7 = split-system air conditioner; 6 = split-system heat pump | 7 (AC) |
| Family | A | A = Silver and Gold single-stage families; V = Platinum variable-speed (letters vary by generation) | A |
| SEER digit | 6 | 3 = 13, 4 = 14, 5 = 15, 6 = 16, 7 = 17, 8 = 18, 0 = 20 | 16 SEER |
| Connections | 0 | 0 = brazed | 0 |
| Cooling capacity | 36 | Thousands of BTU/h; divide by 12 for tons | 36,000 BTU/h = 3 tons |
| Major design | A | Design generation letter | A |
| Power supply | 1 | 1 = 208/230 V single-phase | 208/230-1 |
| Secondary function / revision | 000A | Manufacturer function code plus minor design revision | 000A |
American Standard Tonnage by Model Number
Every American Standard outdoor unit carries its cooling capacity as a two- or three-digit BTU code. Divide by 12 to get tons (1 ton = 12,000 BTU/h). Furnace numbers carry the gas input instead, so a "080" on a furnace means 80,000 BTU/h of heating, not 80,000 BTU/h of cooling.
| Model code | Size | Cooling capacity |
|---|---|---|
| 018 | 1.5 ton | 18,000 BTU/h |
| 024 | 2 ton | 24,000 BTU/h |
| 030 | 2.5 ton | 30,000 BTU/h |
| 036 | 3 ton | 36,000 BTU/h |
| 042 | 3.5 ton | 42,000 BTU/h |
| 048 | 4 ton | 48,000 BTU/h |
| 060 | 5 ton | 60,000 BTU/h |
Common American Standard outdoor families and where they sit:
| Model prefix | Family | Efficiency |
|---|---|---|
| 4A7A4 / 4A7A6 | Silver 14 / Silver 16 | 14-16 SEER |
| 4A7A7 | Gold 17 | 17 SEER |
| 4A7V0 | Platinum 20 variable-speed | Up to 22 SEER |
| 4A6H / 4A6V | Silver, Gold and Platinum heat pumps | 14-20 SEER |
What the American Standard Model Number Does Not Tell You
The model number says nothing about the unit's age. That is in the serial number, and American Standard has changed its serial date format more than once. Use the American Standard serial number lookup to turn a serial into a manufacture date, or the HVAC serial number decoder hub for any other brand. The model number also does not tell you whether the unit was installed and charged correctly, which matters as much as the SEER digit for what it actually costs to run.
Decoded Your American Standard? Here Is What to Do With It
If the unit is under 10 years old and the model number shows a mid- or high-efficiency family, it is usually worth repairing. If the serial dates it past 12 to 15 years for an AC or 15 to 20 years for a furnace, the capacity and cabinet width you just decoded are exactly what you need to size a replacement. A new system at the same tonnage and input will drop straight into the same duct and gas connections.
Related: Goodman vs American Standard furnace comparison · how to read any furnace data label · Goodman model number decoder.
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