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Spec	MrCool DIY 5th Gen 36K Multi-Zone Condenser (5 zones)	Klimaire DIY 5th Gen 36,000 BTU 230V
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Our score	SCORE6.3 / 10	SCORE6.7 / 10
Our take	Up to five heads and 25,200 Btu/h at 5°F, but it can't run below 10,000 Btu/h at 47°F, more than one small room needs on a mild night.	The odd one out: 19 SEER2, 57% of its rating at 5°F and heating ends at -4°F. Skip it for a cold-climate job.
Nominal size	36,000 BTU	36,000 BTU
Voltage	230V	230V
Rated heat at 47°F	36,000 BTU/h	36,000 BTU/h
Heat at 17°F	24,000 BTU/hbest	23,400 BTU/h
Heat at 5°F	25,200 BTU/hbest	20,400 BTU/h
Lowest heating temp	-13°Fbest	-4°F
Max heat at lowest temp	15,200 BTU/h	16,700 BTU/hbest
SEER2	23best	19
HSPF2 (Region IV)	9.9best	9
Install type	Quick-connect	Quick-connect
Line set in box	25 ftbest	16 ft
Max line run	75 ft	n/a
Warranty covers owner install	Yes	Conditional
Warranty, parts	5 yr	5 yr
Warranty, compressor	7 yr	7 yr
ENERGY STAR Cold Climate	Yes	n/a
ENERGY STAR	Yes	No
Refrigerant	R-454B	R-454B
Watch out for	The 4th Gen multi-zone (C suffix, R-410A) is a different system; its 18K ran two zones, not three. On earlier generations owners report idle heads still heating or cooling and rooms overshooting setpoint; there is no long 5th Gen record yet. Line sets are one-time installs; runs past the standard 24.6 ft per head and ducted (AHU) air handlers call for added refrigerant per the manual. No featured offer on this Amazon listing when we checked; look under All Buying Options or buy from a MRCOOL dealer.	Amazon 36K titles say "23 SEER2", but the bullets say up to 19 and NEEP lists 19.0. Believe the 19. The Klimaire Entrada (KIWE/KOIE, -31X, R-32, 17 SEER2) is a flare-and-vacuum unit; the DIY title reads "23 SEER2 Quick Connect". The 4th Gen DIY used the same KIWQ/KOIQ prefixes at 19.0 SEER2; confirm the -45T suffix and R-454B. The warranty page allows DIY installs, but the warranty PDF says licensed contractors only and excludes line sets. Get the DIY terms in writing and register within 45 days. The manual says the EZ-Fast Connect fittings are one-time tightening.
More	Model details Our full review View on Amazon →	Model details Our full review