SACC and ASHRAE answer the same question under different tests
Both figures describe cooling capacity, usually labeled BTU but expressed as a rate in BTU per hour. SACC stands for seasonally adjusted cooling capacity. The DOE method adjusts cooling output for effects including exhaust-duct heat and infiltration, then combines specified test conditions. That helps explain why the adjusted figure is generally lower than the ASHRAE figure on the same portable unit. Source: DOE portable-AC test procedure.
| Figure | What it describes | How to use it |
|---|---|---|
| SACC · BTU/h | Adjusted portable-AC cooling capacity | Compare SACC with SACC for suitable portable models. |
| ASHRAE · BTU/h | Cooling capacity on a different test basis | Compare only with the same rating basis; do not mix columns. |
| Electrical input · W | Power drawn from the supply | Use representative average input and operating time for a cost estimate. |
| Energy · kWh | Electricity accumulated over a period | Multiply by your electricity rate. |
A lower number on a different test is not a lower speed you select on the appliance. It also does not mean the unit loses that percentage of its cooling when switched on. The rating methods describe different test boundaries, not two operating modes.
A real example: one model, two capacity ratings
The LG LP1023BSSM specification, checked September 26, 2026, lists 10,000 BTU SACC and 13,500 BTU ASHRAE. These are manufacturer ratings for the same unit, not our measurements or a buying recommendation.
| Model | SACC | ASHRAE |
|---|---|---|
| LG LP1023BSSM | 10,000 BTU/h | 13,500 BTU/h |
Do not compare its 13,500 ASHRAE figure with a different model’s 10,000 SACC figure and call it 35% more powerful. Obtain the missing matching rating first. There is no universal conversion factor to apply to every model; this one pair of numbers cannot supply one.
Build a shortlist that fits your room
Record exact model, SACC, ASHRAE if supplied, hose arrangement, window-kit dimensions and electrical requirements. Use the manufacturer’s room guidance and installation instructions alongside your room measurements. A larger capacity figure alone does not establish suitability.
Read single-hose versus dual-hose portable ACs for the arrangement question and room sizing for a measurement checklist. If comparing a window unit, first check what its capacity and efficiency ratings mean in the CEER, BTU and watts guide; do not treat different test methods as interchangeable.
Calculate running cost with electrical input
Suppose two suitable units average a hypothetical 700 W and 800 W over the same eight-hour schedule. For 30 days at $0.18/kWh, their electricity costs are $30.24 and $34.56. The modeled difference is $4.32 per month. These inputs are invented examples, not values for the LG unit above.
| Assumed average input | Monthly energy | Monthly electricity cost |
|---|---|---|
| 700 W | 168 kWh | $30.24 |
| 800 W | 192 kWh | $34.56 |
For a purchase decision, compare the price and electricity cost of two appliances. A BTU figure converted into thermal watts is still cooling output, not the electrical input needed for the bill calculation.
Quick answers about SACC, DOE and ASHRAE
Is SACC the same as a portable AC’s electrical watts? No. SACC is adjusted cooling capacity; electrical watts describe input power. Should 12,000 ASHRAE BTU be compared with 12,000 SACC? No. Compare models on the same rating basis. Can one fixed percentage convert every ASHRAE rating to SACC? No. Use the matching published ratings for each exact model. Where does DOE fit? US portable-AC labeling uses the DOE test procedure that produces the seasonally adjusted capacity figure described in this guide.
Choose your next step
Continue with the question that matches your next decision:
- Single-hose vs. dual-hose portable AC: what to compare
- What size window AC does a small bedroom need?
- CEER, cooling capacity and watts: three AC numbers to keep separate
- A window AC buying checklist for renters
- Portable vs. window AC: compare costs and apartment fit
- Portable AC Room Size: Use SACC Before the Square-Foot Claim
- How to Read a Portable AC EnergyGuide Label
Sources & further reading
Numerical examples are illustrative unless explicitly described as measured. This guide does not claim hands-on product testing. Read the methodology and editorial disclosure.