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SpecDella Serena 9,000 BTU 115VSenville Aura 9,000 BTU 230V
PhotoDella Serena 9,000 BTU 115VSenville Aura 9,000 BTU 230V
Our scoreSCORE7.3 / 10SCORE7.5 / 10
Our takeDella publishes no cold-weather figures for either 9K, so we can't tell you how it heats on a cold night. The 230V version is the more efficient heater on paper.Same heat as the Aura 12k on NEEP at every temperature, with 27.4 SEER2. Pro install only, and we don't have a verified listing for this size.
Nominal size9,000 BTU9,000 BTU
Voltage115V230V
Rated heat at 47°F9,800 BTU/h12,000 BTU/h
Heat at 17°Fn/a12,000 BTU/h
Heat at 5°Fn/a11,500 BTU/h
Lowest heating temp5°F-22°Fbest
Max heat at lowest tempn/a5,100 BTU/h
SEER22227.4best
HSPF2 (Region IV)8.512.5best
Install typeFlareFlare
Line set in box16.4 ftn/a
Max line run65.6 ft82 ftbest
Warranty covers owner installConditionalNo
Warranty, partsn/a5 yr
Warranty, compressorn/a10 yr
ENERGY STAR Cold Climaten/aYes
ENERGY STARn/aYes
RefrigerantR-32R-454B
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.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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