Goodman model numbers look like random strings of letters and numbers, but they actually encode everything you need to know about a unit — fuel type, capacity, efficiency, blower type, and more. Here's how to decode them.
Goodman Furnace Model Number Format
A typical Goodman furnace model number looks like: GMVC960804CN
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Here's what each part means:
| Position | Characters | Meaning | Example |
|---|---|---|---|
| Brand | G | G = Goodman; A = Amana | G |
| Fuel type | M | M = Natural gas; P = Propane; E = Electric | M (natural gas) |
| Product type | V | V = Variable speed; S = Single stage; EC = ECM | V (variable speed) |
| Stages | C | C = Two-stage; S = Single-stage | C (two-stage) |
| AFUE efficiency | 96 | Two digits = AFUE percentage | 96% AFUE |
| BTU input (thousands) | 08 | Two digits × 1,000 = BTU input | 80,000 BTU input |
| Cabinet width | 04 | Cabinet width code | 17.5" wide |
| Venting config. | C | C = Upflow/horizontal; D = Downflow; U = Upflow only | C (upflow or horizontal) |
| Revision | N | Letter = Manufacturing revision | N (current revision) |
Common Goodman Furnace Model Prefixes
| Model Prefix | AFUE | Stages | Blower Type | Best For |
|---|---|---|---|---|
| GMVC96 | 96% | Two-stage | Variable-speed ECM | Best overall for MN |
| GMSS96 | 96% | Single-stage | Multi-speed PSC | Budget high-efficiency |
| GMEC96 | 96% | Single-stage | ECM variable-speed | Single-stage with ECM blower |
| GMVC80 | 80% | Two-stage | Variable-speed ECM | 80% with max comfort |
| GMSS80 | 80% | Single-stage | Multi-speed PSC | Entry-level / rentals |
BTU Codes Reference
| Model Digits | BTU Input | 96% AFUE Output BTU | Typical Home Size (MN) |
|---|---|---|---|
| 04 | 40,000 | 38,400 | Under 900 sq ft |
| 06 | 60,000 | 57,600 | 900–1,400 sq ft |
| 08 | 80,000 | 76,800 | 1,400–2,000 sq ft |
| 10 | 100,000 | 96,000 | 2,000–2,600 sq ft |
| 12 | 120,000 | 115,200 | 2,600–3,200 sq ft |
| 14 | 140,000 | 134,400 | 3,200+ sq ft |
Goodman AC Model Numbers (GSX/GSXC/GSXH Series)
Goodman central AC models follow a similar pattern. Example: GSXC180481
- G = Goodman brand
- S = Split system (outdoor unit)
- X = AC (no heat); H = Heat pump
- C = Two-stage; (no letter or N = single-stage)
- 18 = SEER rating (18 SEER)
- 048 = Capacity in thousands of BTU/hr (48,000 BTU = 4-ton)
- 1 = Revision number
How to Read a Goodman Serial Number (Find Your Unit's Age)
Your Goodman serial number tells you exactly how old your equipment is — the fastest way to know whether a unit is worth repairing or due for replacement. On Goodman, Amana, and Daikin equipment, the first four digits of the serial number are the date of manufacture: the first two are the year, the next two are the month.
Example serial: 1806123456
- 18 = Year of manufacture (2018)
- 06 = Month of manufacture (June)
- 123456 = Unit's unique production sequence
So serial 1806123456 was manufactured in June 2018.
| Serial starts with… | Manufactured | Approx. age in 2026 |
|---|---|---|
| 2203… | March 2022 | ~4 years |
| 1908… | August 2019 | ~7 years |
| 1511… | November 2015 | ~11 years |
| 0805… | May 2008 | ~18 years |
Rule of thumb: a Goodman furnace typically lasts 15–20 years and an AC or heat pump about 12–15 years. If your serial dates the unit past that window — or it's close and starting to need repairs — a new system usually costs less over time than repeated fixes. If it’s time to replace, you can shop factory-direct AC, furnace & heat pump systems with free delivery to all 48 states, or use the model lookup below to match your exact unit.
How to Find Your Current Furnace Model Number
The model number is on a sticker on the outside of the furnace cabinet — usually on the side or inside the front door panel. It's typically 10–14 characters. The serial number is nearby and encodes the manufacture date (useful when buying a replacement).
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