Fujitsu General; BTU-code digits after series letters. Paste your model number for an instant decode.
Always confirm against the data plate's rated capacity line — model ranges occasionally reuse digits for non-capacity codes, and the plate is authoritative.
| Capacity code | BTU/hr | Tons |
|---|---|---|
| 09 | 9,000 | 0.75 |
| 12 | 12,000 | 1.0 |
| 18 | 18,000 | 1.5 |
| 24 | 24,000 | 2.0 |
| 30 | 30,000 | 2.5 |
| 36 | 36,000 | 3.0 |
| 42 | 42,000 | 3.5 |
| 48 | 48,000 | 4.0 |
| 60 | 60,000 | 5.0 |
Amana American Standard Blue Star Bryant Carrier Daikin Goodman Heil Hitachi Lennox LG Lloyd Panasonic Payne Rheem Ruud Samsung Trane Voltas Whirlpool York
On the data plate — a metal or foil sticker on the side or back of the outdoor unit (or behind the front panel on indoor split units). Use the model number, not the serial number, which encodes the manufacture date rather than capacity.
Fujitsu General; BTU-code digits after series letters. Divide the BTU code by 12 to get tons.
Paste the model number from the outdoor unit's data plate into the decoder above — it applies O General's nomenclature automatically. Example: ASGG18CPTA = 1.5 tons.
O General (Fujitsu General) uses a standard shorthand track (BTU code ÷ 12) and a metric class-index track for global lines.
Tropical inverter models such as ASGA18FTTA or ASGG24CPTA begin with a component code — AS for wall-mounted split indoor units, AO for outdoor condensers — and place the capacity at the size window (18 → 1.5 tons, 24 → 2.0 tons).
Traditional window units change the prefix to AW (e.g. AWGA24CRTA) but keep the same internal sizing rule, so the decoder sweeps the string for the standard two-digit capacity marker.
The decoder above applies this nomenclature automatically. Capacity codes are nominal — always confirm against the rated-capacity line on the unit’s data plate.
Capacity decoding on this page follows O General’s published model-number nomenclature. To confirm a unit’s actual rated capacity and efficiency, cross-check the authoritative references below.
Tonnage is derived from nominal cooling capacity: 1 ton = 12,000 BTU/hr ≈ 3.5 kW. Indian shorthand codes (e.g. 12, 18, 24) and metric kW classes both map to these nominal tonnages.
Model-number conventions and standards evolve, and manufacturers occasionally reuse digits for non-capacity codes — the rated-capacity line on the unit’s data plate is always authoritative. Figures here are for identification and planning, not a substitute for a professional load calculation.
Different brand? Back to the full 22-brand decoder. Sizing a replacement? Check what your space really needs with the AC tonnage calculator first — the old unit may have been mis-sized.