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SpecSenville Leto 9,000 BTU 230VDella Serena 9,000 BTU 115V
PhotoSenville Leto 9,000 BTU 230VDella Serena 9,000 BTU 115V
Our scoreSCORE6.4 / 10SCORE7.3 / 10
Our takeThe better Leto heater for a small room: 70% of its rating at 5°F, more than the 115V 12k makes. Senville still says the line heats only to 5°F.Della 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.
Nominal size9,000 BTU9,000 BTU
Voltage230V115V
Rated heat at 47°F10,000 BTU/h9,800 BTU/h
Heat at 17°F8,000 BTU/hn/a
Heat at 5°F7,000 BTU/hn/a
Lowest heating temp5°F5°F
SEER2n/a22
HSPF2 (Region IV)n/a8.5
Install typeFlareFlare
Line set in boxn/a16.4 ft
Max line run82 ftbest65.6 ft
Warranty covers owner installNoConditional
Warranty, parts5 yrn/a
Warranty, compressor5 yrn/a
ENERGY STAR Cold ClimateYesn/a
ENERGY STARYesn/a
RefrigerantR-454BR-32
Watch out forAmazon Leto listings don't state refrigerant; current R-454B pairings are SENL-xxCD-OL + SENL-xxCD-ILL, older R-410A ones end /OY + /IY. Senville's FAQ says no to owner installs, and the warranty requires a licensed HVAC contractor.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.
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