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SpecDella Serena 18,000 BTU 230VSenville Elite 18,000 BTU 230V
PhotoDella Serena 18,000 BTU 230VSenville Elite 18,000 BTU 230V
Our scoreSCORE7.3 / 10SCORE7.6 / 10
Our takeOur pick for a garage or shop if you'll handle the evacuation: 13,500 BTU/h at 5°F and free parts for a registered DIY install. Nothing is published below 5°F.The strongest Elite relative to its size: 22,600 Btu/h at 5°F and 11,900 max at -22°F.
Nominal size18,000 BTU18,000 BTU
Voltage230V230V
Rated heat at 47°F18,000 BTU/h20,000 BTU/h
Heat at 17°F15,000 BTU/h19,300 BTU/hbest
Heat at 5°F13,500 BTU/h22,600 BTU/hbest
Lowest heating temp5°F-22°Fbest
Max heat at lowest tempn/a11,900 BTU/h
SEER22225.6best
HSPF2 (Region IV)9.516.2best
Install typeFlareFlare
Line set in box16.4 ftbest16 ft
Max line run98.4 ft98.4 ft
Warranty covers owner installConditionalNo
Warranty, partsn/a10 yr
Warranty, compressorn/a10 yr
ENERGY STAR Cold ClimateYesYes
ENERGY STARYesYes
RefrigerantR-32R-454B
Watch out forDella's own 25 ft line set on Amazon is 1/4 x 3/8 in, which doesn't match the 18K's 1/2 in gas line. The 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.Senville's FAQ says no to owner installs; warranty registration asks for the installing company and invoice. Senville's site lists higher HSPF2 than the AHRI figures on NEEP; we use the certified numbers. The Amazon 18K listing model field reads SENE-12EL-16 while the part number is SENE-18EL-16.
MoreModel detailsOur full reviewView on Amazon →Model detailsOur full reviewView on Amazon →