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SpecSenville Elite 12,000 BTU 230VMrCool Olympus E Star 4th Gen 12,000 BTU
PhotoSenville Elite 12,000 BTU 230VMrCool Olympus E Star 4th Gen 12,000 BTU
Our scoreSCORE7.6 / 10SCORE7.4 / 10
Our take13,500 Btu/h at 5°F and 7,500 max at -22°F, the most cold-night heat of any 12K we review. Licensed install required for the 10/10 warranty.About 96% of its rating at 5°F and heat published to -22°F, among the best cold numbers we cover. Budget a contractor, because it isn't a DIY unit.
Nominal size12,000 BTU12,000 BTU
Voltage230V230V
Rated heat at 47°F12,000 BTU/h12,000 BTU/h
Heat at 17°F11,000 BTU/h12,000 BTU/hbest
Heat at 5°F13,500 BTU/hbest11,500 BTU/h
Lowest heating temp-22°F-22°F
Max heat at lowest temp7,500 BTU/hbest5,900 BTU/h
SEER229.4best25.4
HSPF2 (Region IV)12.7best10.5
Install typeFlareFlare
Line set in box16 ftn/a
Max line run82 ft82 ft
Warranty covers owner installNoNo
Warranty, parts10 yrbest5 yr
Warranty, compressor10 yrbest7 yr
ENERGY STAR Cold ClimateYesYes
ENERGY STARYesYes
RefrigerantR-454BR-454B
Watch out forSenville's FAQ says no to owner installs; warranty registration asks for the installing company and invoice. Senville's site lists higher HSPF2 than the AHRI figures on NEEP; we use the certified numbers."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.
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