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Pick two to four models. The best figure in each row is marked, and every number comes from the maker, NEEP or ENERGY STAR. Copy the URL to share a comparison.

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SpecMrCool DIY Select 24,000 BTU 230VSenville Aura 24,000 BTU 230V
PhotoMrCool DIY Select 24,000 BTU 230VSenville Aura 24,000 BTU 230V
Our scoreSCORE5.2 / 10SCORE7.5 / 10
Our takeThe largest DIY Select, at 16.5 SEER2 with no published cold-weather figures we can cite. We'd look at the DIY 5th Gen or Easy Pro 24k instead.For a big open zone in a cold climate with a contractor doing the install: 24,200 BTU/h at 5°F. Its high minimum output rules out single rooms.
Nominal size24,000 BTU24,000 BTU
Voltage230V230V
Rated heat at 47°Fn/a29,000 BTU/h
Heat at 17°Fn/a22,200 BTU/h
Heat at 5°Fn/a24,200 BTU/h
Lowest heating tempn/a-22°F
Max heat at lowest tempn/a11,900 BTU/h
SEER216.5n/a
HSPF2 (Region IV)8.313.5best
Install typeQuick-connectFlare
Line set in box11.5 ftn/a
Max line run75 ft164 ftbest
Warranty covers owner installYesNo
Warranty, parts1 yr5 yrbest
Warranty, compressor2 yr10 yrbest
ENERGY STAR Cold Climaten/aYes
ENERGY STARn/aYes
Refrigerantn/aR-454B
Watch out forMRCOOL's naming is inconsistent: its product data says "DIY Select 1st Gen" while the warranty is titled "5th Generation DIY Select Series". A "5th Gen" listing that says "Select" is this cheaper line. Model numbers start DIYS- (outdoor ends A11-O, wall unit A13-O); DIY- ...D25-O is the DIY 5th Gen. ENERGY STAR status conflicts: MRCOOL's catalog says certified, MRCOOL's product data and NEEP say no.Senville's 24k page shows a ceiling-cassette spec table, so these figures come from NEEP only. The Amazon 24k listing (SENA/24HF) doesn't state refrigerant; confirm the model before you pay. 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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