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SpecDella Serena 12,000 BTU 115VGree Sapphire R32 12,000 BTU 230V
PhotoDella Serena 12,000 BTU 115VGree Sapphire R32 12,000 BTU 230V
Our scoreSCORE7.3 / 10SCORE7.5 / 10
Our takeThe most 5°F heat of the 115V 12k units we cover, 9,200 BTU/h, with ENERGY STAR Cold Climate status. You still need a vacuum pump or a tech for the startup.Makes about as much heat at 5°F as a Livo 18K and heats to -22°F. The pick within Gree if this is a room's main heat.
Nominal size12,000 BTU12,000 BTU
Voltage115V230V
Rated heat at 47°F12,300 BTU/h12,200 BTU/h
Heat at 17°F9,500 BTU/h13,000 BTU/hbest
Heat at 5°F9,200 BTU/h12,200 BTU/hbest
Lowest heating temp5°F-22°Fbest
Max heat at lowest tempn/a8,500 BTU/h
SEER22229.5best
HSPF2 (Region IV)9.510best
Install typeFlareFlare
Line set in box16.4 ftn/a
Max line run65.6 ft131 ftbest
Warranty covers owner installConditionalNo
Warranty, partsn/a5 yr
Warranty, compressorn/a7 yr
ENERGY STAR Cold ClimateYesn/a
ENERGY STARYesn/a
RefrigerantR-32R-32
Watch out forThe listing says "Pre-Charged", but Della's FAQ says the lines are not pre-vacuumed; it is a flare-and-vacuum install. Della's printed manual says the extended warranty is for professional installation; the current web policy gives registered DIY installs replacement parts at Della's discretion. Screenshot it the day you buy. Della also sells Vario, Optima Pro, Hyper Heat and older R410A lines; most owner reports are about those.Amazon Sapphire titles show old SEER figures ("21.5 SEER" on the 24K); confirm the SAPxxHP230V1R32AH/AO model numbers. Gree's submittal prints lower 17°F figures than the certified NEEP ratings; go by NEEP. Gree's warranty applies only to installs by a state certified or licensed HVAC contractor, and claims are contractor-only.
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