Keplerx: 3 DOE certified models
Keplerx has 3 portable AC basic models certified to DOE as of 2026-11-03, rated 5,000 to 8,000 BTU/h SACC. How their efficiency compares with their DOE class is below.
Key findings
- Highest certified cooling capacity among its portable ACs: Keplerx KAPC8RC1 at 8,000 BTU/h SACC.
Source: DOE Compliance Certification Database (portable ACs), data as of 2026-11-03.
Portable air conditioners
| # | Photo | Model | Labels | SACC, BTU/h | Covers | CEER | Hose | Heat | Brands |
|---|---|---|---|---|---|---|---|---|---|
| 1 | KeplerxKAPC8RC1 |
| 8,000SACC, up to 350 sq ft | 350 sq ft | 7.2 | Single hose | No | 1 | |
| 2 | KeplerxKAPC7RC1 |
| 7,100SACC, up to 300 sq ft | 300 sq ft | 7 | Single hose | No | 1 | |
| 3 | KeplerxKAPC5RC1 |
| 5,000SACC, up to 150 sq ft | 150 sq ft | 6.1 | Single hose | No | 1 |
How efficient are Keplerx portable ACs?
Of the 3 Keplerx portable ACs, none files a higher CEER than the class median: 3 fall below it.
| Class | Keplerx models | Above median | Class median | Best Keplerx |
|---|---|---|---|---|
| Single hose portable ACs (1,044) | 3 | 0 | CEER 7.3 | KAPC8RC1 CEER 7.2 |
A higher CEER means more cooling per watt.
Who makes Keplerx portable ACs?
DOE's database has no manufacturer field, so the evidence is whose model number each unit is filed under and which other brands file the same unit.
None of the 3 Keplerx basic models is filed by another brand as of 2026-11-03, and none uses another company's model number. DOE's records tie them to Keplerx alone.
How much does a Keplerx portable AC cost to run?
While cooling, Keplerx portable ACs draw about 820 to 1,111 W (certified SACC divided by CEER). That's 15¢ to 20¢ an hour, or $35.72 to $48.43 for 30 days at 8 hours a day. The lowest is Keplerx KAPC5RC1 (5,000 BTU/h SACC, CEER 6.1) and the highest Keplerx KAPC8RC1 (8,000 BTU/h SACC, CEER 7.2).
At 18.16¢ per kWh, the US average residential price for August 2026 (EIA Electric Power Monthly, table 5.6.A). Worked out from the certified figures.
Questions about Keplerx
- Is Keplerx a good portable AC brand?
- How its 3 portable ACs compare on efficiency with their DOE class is above. All 3 are filed under Keplerx alone. We don't test reliability, noise or build quality, so we can't rank brands on those. How we compare models.
- How big a room will a Keplerx portable AC cool?
- Its models certify 5,000 to 8,000 BTU/h SACC, which ENERGY STAR's sizing chart puts at 150 to 350 sq ft. Every one was tested single hose. SACC and the BTU figure on the box.
- Which Keplerx portable AC is the most efficient for its size?
- Keplerx KAPC8RC1, at CEER 7.2: higher than 311 of the 1,044 single hose portable ACs certified to DOE. At the other end is Keplerx KAPC5RC1, at CEER 6.1, higher than 7 of the 1,044 in its class.