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SpecMrCool Universal 2.5-ton R-454B (UHP18030-O + UAH18030-O)Senville Elite 24,000 BTU 230V
PhotoMrCool Universal 2.5-ton R-454B (UHP18030-O + UAH18030-O)Senville Elite 24,000 BTU 230V
Our scoreSCORE6.7 / 10SCORE7.6 / 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.Makes less at 5°F than the 18K (20,000 vs 22,600) and NEEP files it as centrally ducted; the least-documented Elite size.
Nominal size30,000 BTU24,000 BTU
Voltage230V230V
Rated heat at 47°F33,000 BTU/h24,000 BTU/h
Heat at 17°F24,000 BTU/hbest17,100 BTU/h
Heat at 5°F33,200 BTU/hbest20,000 BTU/h
Lowest heating temp-22°F-22°F
Max heat at lowest temp17,900 BTU/hbest10,200 BTU/h
SEER217.225best
HSPF2 (Region IV)10.811best
Install typeFlareFlare
Line set in boxn/a16 ft
Max line run164 ftn/a
Warranty covers owner installNoNo
Warranty, parts10 yr10 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.Senville'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. No published max line length for the 24K; Senville's page lists 24.0 SEER2 / 11.0 EER2 vs 25.0 / 14.0 on NEEP.
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