The Senville LETO SENL-09CD-16 is a 9,000 BTU ductless mini-split heat pump that runs on a 115V circuit. In a video review after about three weeks of use in his kitchen, Fix It Scotty called it very quiet, inside and out, and economical, and said it would be a win overall if it lasts. The catch is installation: he describes it as a job for a fairly advanced DIYer, because the line set has to be cut, re-flared and vacuumed down with a pump before the refrigerant is released.
Full review
What it is
The SENL-09CD-16 is the 9,000 BTU, 115V size of Senville's LETO line: a wall-mounted indoor unit and an outdoor condenser joined by a 16 ft line set. Senville's Amazon listing rates it at 21.5 SEER2 with R-454B refrigerant and a heat pump that works down to 5F, and lists Alexa and app control. The warranty on the listing is five years on parts and five on the compressor, with labor not included.
Fix It Scotty's three weeks with it
In a video review, Fix It Scotty installed the 9,000 BTU 115V LETO in his kitchen and had been running it for about three weeks. He calls it very quiet, whisper quiet while recording, and says the outdoor unit is about as quiet as the indoor one, without the typical grind of an AC compressor. He likes that the remote can stay on the wall and that the system is easy to use.
His verdict is positive with one reservation: he likes that it is economical and really quiet, and says it will be a win overall if its longevity is decent.
What the install involves
Fix It Scotty describes the install as fairly DIY but for an advanced DIYer. He ran a dedicated 15-amp circuit to an outdoor disconnect himself and notes the 9,000 BTU 115V unit can use a 15-amp circuit while 12,000 BTU and larger units may need 20 amps or more. He suggests hiring an electrician for that step if you are not comfortable working in your panel.
The line set uses flare fittings rather than brazed joints, but he still had to trim about 2 ft off it and re-flare the ends with a flaring tool, use a refrigerant-safe thread sealant, and then pull a vacuum with a pump for at least 30 minutes (he ran it for about 45) before confirming there were no leaks on a gauge set and releasing the refrigerant. A line set cover and an outdoor wall bracket were extra purchases. He spent about four days on the job spread over a few weekends and estimates someone without the tools could do it for about $1,000.
Strengths
- +Very quiet indoors, and Fix It Scotty says the outdoor unit is about as quiet, without the usual compressor grind
- +Economical: Fix It Scotty cites a $699 retail price for the unit and put his total at under $800, as he already owned the tools
- +Runs on a 115V, 15-amp dedicated circuit in the 9,000 BTU size, per Fix It Scotty
- +Flare fittings mean no brazing or soldering of the line set, which Fix It Scotty says is what makes it DIY-able
- +Easy-to-use remote that can live on the wall, per Fix It Scotty
Watch-outs
- −Installation needs a fairly advanced DIYer: Fix It Scotty had to trim and re-flare the line set, then vacuum it down with a pump and check for leaks with a gauge set before releasing refrigerant
- −A dedicated circuit and outdoor disconnect are needed; Fix It Scotty suggests an electrician if you are not comfortable working in your panel
- −Line set cover and outdoor wall bracket are not included; Fix It Scotty bought both separately
- −Fix It Scotty had used it for only about three weeks, so long-term durability is unknown
How it compares
Like the Della Optima Series 12,000 BTU 115V, the LETO runs on a 115V circuit, but it is a smaller 9,000 BTU unit, and its listing rates the heat pump to 5F against the LG Artcool Deluxe KNSAL's full heating capacity at -13F. Unlike the Della, which Wired had professionally installed, the LETO's hands-on source installed it himself, line set vacuum included.
Rating sources
Our 4.0 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
