Head-to-head · Best Mini Split Air Conditioners

Della Optima Series 12,000 BTU 115V vs LG Artcool Deluxe KNSAL

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

Verdict is reader-supported. As an Amazon Associate we earn from qualifying purchases. Some links on this page are affiliate links — if you click through and buy, we may earn a small commission at no extra cost to you. Our ratings are sourced from independent publications, not sponsors.

The short answer

Della Optima Series 12,000 BTU 115V is the only one of the two with a published score (3.3); LG Artcool Deluxe KNSAL has none, so this is not a close call so much as an unmeasured one. Della Optima Series 12,000 BTU 115V is best for: Buyers who want a low-cost 115V heat pump for one room and can live without location-based automation. Read the strengths below before deciding.

Higher ratedRanked #3 in Best Mini Split Air Conditioners

Della Optima Series 12,000 BTU 115V

3.3

1 source$969.96as of Oct 14

The Della Optima Series 12,000 BTU is a 115-volt, 23 SEER2 heat pump mini split with Wi-Fi app control, listed by Della for spaces up to 550 square feet. Wired rated it 6 out of 10: its reviewer found it cooled and heated the room well, ran quietly and had a capable app with Alexa and Google Assistant support, but could never get the geofencing feature to work and was quoted $3,600 for professional installation, several times the price of the hardware.

Strengths

— Wired found it kept the room properly cooled and heated after a professional install
— Quiet in Wired's measurements: 50 dB on turbo and 40 dB on night mode at 3 feet, against 30 dB of ambient sound
— Runs on a 115-volt circuit with a 960-watt maximum draw, per Wired

Watch-outs

— Geofencing never worked for Wired, even after 10 days of troubleshooting with Della support
— Wired was quoted $3,600 for professional installation, far more than the unit itself
— The 15-button infrared remote is complex and needs line of sight; Wired notes commands are ignored if it is not aimed at the air handler

$969.96 · Check Price on Amazon Full review →

Ranked #4 in Best Mini Split Air Conditioners

LG Artcool Deluxe KNSAL

Unrated5 sources$2,637as of Oct 17

The LG Artcool Deluxe KNSAL delivers efficient year-round comfort with advanced features like LGRED° Core technology that ensures 100% heating capacity down to -13° F. It includes Dual Vane technology for precise airflow, an Occupancy Sensor for energy savings, and innovations such as Soft Air, Freeze Cleaning, and Auto Clean+. While it offers strong performance in heating and cooling, it has fewer power options compared to some competitors. This unit is ideal for homeowners seeking reliable climate control in moderate to cold climates.

Strengths

— 13000 BTU heating capacity with 100% heating capacity at -13° F
— Dual Vane technology for precise airflow control
— Occupancy Sensor for energy efficiency and automatic mode adjustment

Watch-outs

— Limited power options compared to other models (only 2.5 and 3.5 KW available)

$2,637 · Buy at hvacdirect.com Full review →

How they stack up

Della Optima Series 12,000 BTU 115V

The Della Optima and the Senville LETO 9,000 BTU are the two 115V units on this page; the LG Artcool Deluxe KNSAL needs 208/230V. Its 12,000 BTU of cooling equals the LG and is above the Senville's 9,000 BTU. Wired lists 12,400 BTU of heating for it, under the LG's 13,000 BTU. It uses R454B refrigerant like the Senville, where the LG uses R-32.

LG Artcool Deluxe KNSAL

The LG Artcool Deluxe KNSAL keeps full heating capacity down to -13°F, where the Senville LETO's entry rates heating down to 5°F. Its 12,000 BTU of cooling equals the Della Optima Series 12,000 BTU 115V and is above the Senville's 9,000 BTU. It lists 13,000 BTU of heating against 12,400 BTU for the Della, and it needs 208/230V where the Della and the Senville run on 115V.

Specs side-by-side

Spec	Della Optima Series 12,000 BTU 115V	LG Artcool Deluxe KNSAL
Cooling Capacity	12,000 BTU	12000 BTU
Heating Capacity	12,400 BTU	13000 BTU
Efficiency	23 SEER2	—
Voltage	115V	208/230V
Refrigerant	R454B	R-32
Rated Coverage	550 sq ft	—
Maximum Power Draw	960 watts	—
Type	Wall-mount ductless heat pump	Wall-Mount
Airflow	—	515 CFM
Model	—	KSSAL121A (system)

← See the full ranking of best mini split air conditioners