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SpecMrCool DIY 5th Gen 18,000 BTU 230VSenville Aura 18,000 BTU 230V
PhotoMrCool DIY 5th Gen 18,000 BTU 230VSenville Aura 18,000 BTU 230V
Our scoreSCORE6.9 / 10SCORE7.5 / 10
Our takeThe size we'd look at first for a garage on a 230V circuit: 12,800 BTU/h at 5°F and more heat at -13°F than the 24k. We don't have a verified Amazon listing for this size.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°F13,400 BTU/h18,000 BTU/hbest
Heat at 5°F12,800 BTU/h18,000 BTU/hbest
Lowest heating temp-13°F-22°Fbest
Max heat at lowest temp12,200 BTU/hbest8,000 BTU/h
SEER222.5best21.4
HSPF2 (Region IV)11.5best11
Install typeQuick-connectFlare
Line set in box25 ftn/a
Max line run75 ft98.4 ftbest
Warranty covers owner installYesNo
Warranty, parts5 yr5 yr
Warranty, compressor7 yr10 yrbest
ENERGY STAR Cold ClimateYesYes
ENERGY STARYesYes
RefrigerantR-454BR-454B
Watch out forMRCOOL also called its older R-410A 4th Gen DIY "E Star"; confirm R-454B and a model number of the form DIY-...D25-O. DIYS- is the cheaper DIY Select and EZPRO- is the Easy Pro; a listing that says "5th Gen" and "Select" is the Select. The manual says the line sets install once; reconnecting them, or the pipes at the outdoor unit, voids the warranty.The Amazon 18k listing gives 2 yr parts / 7 yr compressor; confirm the term for the model you receive. Senville sells the Aura on Amazon itself, and SENA-12HF-16 is the kit number Senville's own site lists for the current R-454B Aura; a few listing fields (a 25.5 efficiency figure, a 2-year parts warranty) still show older numbers, so go by Senville's spec sheet. 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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