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SpecMrCool Olympus E Star 4th Gen 18,000 BTUSenville Aura 18,000 BTU 230V
PhotoMrCool Olympus E Star 4th Gen 18,000 BTUSenville Aura 18,000 BTU 230V
Our scoreSCORE7.4 / 10SCORE7.5 / 10
Our takeFull 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.Full rated output at 5°F, matching the Olympus E Star 18k value for value, and it cost less than the Amazon Olympus when we checked. Licensed install required.
Nominal size18,000 BTU18,000 BTU
Voltage230V230V
Rated heat at 47°F18,000 BTU/h18,000 BTU/h
Heat at 17°F18,000 BTU/h18,000 BTU/h
Heat at 5°F18,000 BTU/h18,000 BTU/h
Lowest heating temp-22°F-22°F
Max heat at lowest temp8,000 BTU/h8,000 BTU/h
SEER221.421.4
HSPF2 (Region IV)1111
Install typeFlareFlare
Max line run98.4 ft98.4 ft
Warranty covers owner installNoNo
Warranty, parts5 yr5 yr
Warranty, compressor7 yr10 yrbest
ENERGY STAR Cold ClimateYesYes
ENERGY STARYesYes
RefrigerantR-454BR-454B
Watch out for"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.The Amazon 18k listing gives 2 yr parts / 7 yr compressor; confirm the term for the model you receive. The Amazon Aura listings don't state refrigerant. The 12k listing (SENA-12HF-16) shows a 25.5 efficiency figure that matches the older R-410A Aura and a 2 yr parts / 7 yr compressor warranty field; confirm model and refrigerant before you pay. Current R-454B wall pairings are SENA-xxHF-OG + SENA-xxHF-IGG; older R-410A pairings end /OQ + /IQ. Senville's site lists higher HSPF2 and 47°F heat than the AHRI figures on NEEP; we use the certified numbers. Senville's FAQ says no to owner installs, and the warranty requires a licensed HVAC contractor.
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