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SpecMrCool Universal 2.5-ton R-454B (UHP18030-O + UAH18030-O)Senville Aura 28K Multi-Zone Condenser (SENA-28HF-MOA)
PhotoMrCool Universal 2.5-ton R-454B (UHP18030-O + UAH18030-O)Senville Aura 28K Multi-Zone Condenser (SENA-28HF-MOA)
Our scoreSCORE6.7 / 10SCORE6.8 / 10
Our take33,200 Btu/h at 5°F, slightly above its 47°F rating, with 10.8 HSPF2, the best in the line. Warranty requires a professional installer and an authorized dealer. We don't have a verified Amazon listing for this size.Holds its full 27,000 Btu/h rating at 5°F, about 50% more than MrCool's DIY 27K, but needs a licensed installer and turns down only to 8,400 Btu/h.
Nominal size30,000 BTU28,000 BTU
Voltage230V230V
Rated heat at 47°F33,000 BTU/h27,000 BTU/h
Heat at 17°F24,000 BTU/h30,000 BTU/hbest
Heat at 5°F33,200 BTU/hbest27,000 BTU/h
Lowest heating temp-22°F-22°F
Max heat at lowest temp17,900 BTU/hbest14,000 BTU/h
SEER217.223best
HSPF2 (Region IV)10.8best10.5
Install typeFlareFlare
Max line run164 ftn/a
Warranty covers owner installNoNo
Warranty, parts10 yrbest5 yr
Warranty, compressor10 yr10 yr
ENERGY STAR Cold ClimateYesYes
ENERGY STARYesYes
RefrigerantR-454BR-454B
Watch out forThis is the 2nd-gen R-454B Universal (model numbers ending -O); most owner history online is about the discontinued R-410A first generation. MRCOOL's printed warranty requires a professional installer and an authorized dealer; the Central Ducted Hyper Heat 2nd Gen warranty allows owner installs with the Quick Connect line set. NEEP ratings with MRCOOL cased coils on a furnace are lower than with the matched UAH air handler, and some coil pairings aren't ENERGY STAR Cold Climate.MOA outdoor units are listed as R-454B on Senville's pages and NEEP; NEEP lists the MOB units as R-410A, and an owner of an earlier SENA-28HF-MOA reports R-410A. Confirm the refrigerant on the label. Senville's FAQ says owner installs are not supported; the warranty certificate requires a licensed professional, and labor is never covered.
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