Compare mini-splits & heat pumps / MrCool Olympus E Star 4th Gen
MrCool · Olympus E Star 4th Gen
MrCool Olympus E Star 4th Gen 18,000 BTU
Model O-ES-18-HP-C-230C-O1 · O-18-HP-WMAH-230C-O
SCORE7.4 / 10
Full rated output at 5°F, the size we'd take for a cold-climate room or garage if a MrCool contractor quotes it fairly. Plan backup heat for -22°F nights, where it tops out at 8,000 BTU/h.
Specs
| Spec | MrCool Olympus E Star 4th Gen 18,000 BTU |
|---|---|
| Nominal size | 18,000 BTU |
| Voltage | 230V |
| Rated heat at 47°F | 18,000 BTU/h |
| Heat at 17°F | 18,000 BTU/h |
| Heat at 5°F | 18,000 BTU/h |
| Lowest heating temp | -22°F |
| Max heat at lowest temp | 8,000 BTU/h |
| SEER2 | 21.4 |
| HSPF2 (Region IV) | 11 |
| Install type | Flare |
| Max line run | 98.4 ft |
| Warranty covers owner install | No |
| Warranty, parts | 5 yr |
| Warranty, compressor | 7 yr |
| ENERGY STAR Cold Climate | Yes |
| ENERGY STAR | Yes |
| Refrigerant | R-454B |
| Heat at 17°F per MrCool submittal | 16,600 BTU/h (NEEP lists more) |
| Pre-charge | 24.6 ft of line |
Sources: NEEP ccASHP list · MrCool Olympus E Star submittal · MrCool Olympus install manual · MrCool Olympus 4th Gen warranty
Before you buy
- "E Star" and the O-ES prefix also appear on an older R-410A Olympus (-230B condensers); confirm R-454B and an outdoor model ending -230C-O1.
- The Olympus listings on Amazon are the legacy R-410A Hyper Heat, not this unit.
- MrCool's FAQ says an HVAC professional must install it; the warranty's softer "may be necessary" wording doesn't change that.
Compare it with
- MrCool Olympus E Star 4th Gen 18,000 BTU vs Senville Elite 18,000 BTU 230V (our score 7.6)
- MrCool Olympus E Star 4th Gen 18,000 BTU vs Senville Aura 18,000 BTU 230V (our score 7.5)
- MrCool Olympus E Star 4th Gen 18,000 BTU vs Gree Sapphire R32 18,000 BTU 230V (our score 7.5)
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