The maker's photo for this series, not this exact size; the outdoor unit grows with capacity

LG · Single-Zone

LG Art Cool Deluxe LGRED 9,000 BTU

KNSAL091A / KUSAL091A

~$2,017approximate retailer price at last check, equipment only

BTU/h: 9k
Volts: 230
Zones: 1
SEER2: 27
HSPF2: 13.5
Heats to: -31°F
Refrig.: R-32
Covers: 350 ft²
Wi-Fi: Built in

Best forSmall, cold bedrooms and offices where one 9k head has to be the main heat.

Overview

This is LG's R-32 cold-climate wall unit, sold under the Art Cool Deluxe name with the LGRED Core compressor package. The 9k pair is rated 27 SEER2 and 13.5 HSPF2, and LG publishes operation down to -31°F, which puts it in the same conversation as Mitsubishi's FX and Daikin's Aurora rather than the Standard and Mega lines LG also sells. The outdoor unit carries a base pan heater as standard. At about $2,000 for the pair it costs roughly twice what an LG Mega 9k does and less than a Mitsubishi FX09. The catch is size: nine thousand BTU is a bedroom or a small office, so the cold-weather headroom matters most where the load really is that small. Wi-Fi works through LG's ThinQ app.

Factory base-pan heater
12,000 BTU at 5°F (NEEP)

Cold-weather output

At 5°F it makes more heat than its 47°F rating (109%), according to the certified NEEP listing for this pairing. LG rates it to keep running down to -31°F.

COP at 5°F: 2.04
Refrigerant: R-32
AHRI cert.: 216368959
ENERGY STAR cold climate: Yes

Pairing: KUSAL091A with KNSAL091A. Checked October 8, 2026 on NEEP's ccASHP list; a different head or condenser posts different numbers.

Strengths and catches

Strengths

+27 SEER2 and 13.5 HSPF2 are among the highest published for any 9k wall unit
+LG lists heating operation to -31°F outdoors
+Factory base pan heater on the outdoor unit
+Built for R-32 with a 24.6 ft pre-charged line length
+10-year warranty term with licensed install

Catches

−Indoor ($695) and outdoor ($1,322) units are separate SKUs, so confirm the pair before ordering
−Licensed install and 60-day registration are conditions of the 10-year term
−Line set not included

Questions buyers ask

Is a 9,000 BTU LGRED big enough for my room?+

It is listed for about 350 sq ft, which suits a bedroom, nursery or small office. NEEP certifies 11,000 BTU of heating at 47°F, so it has a little more heating than the nameplate suggests. It is not meant for an open living area.

How much heat does it put out at 5°F?+

NEEP certifies a maximum of 12,000 BTU at 5°F with a COP of 2.04. That is above the 47°F figure of 11,000 BTU, so output does not fall off in the cold. LG publishes operation down to -31°F.

Does it need a licensed installer?+

The 10-year warranty is conditional on a licensed installer and registration within 60 days, so a DIY install risks the coverage. The line set is not in the box; 15 to 50 ft sets are sold separately. The unit is pre-charged for a 24.6 ft run.

Is R-32 safe to have in the house?+

R-32 is rated A2L, meaning mildly flammable. The practical step is choosing an installer trained to handle it. LG lists it as built for R-32 from the factory.

Should I pick this over the Mitsubishi FX09 or the LG Mega 9k?+

At about $2,017 it costs roughly twice the LG Mega 9k at $1,143 and less than a Mitsubishi FX09. The extra money buys 27 SEER2 against the Mega's 21, and heating rated to -31°F instead of 5°F. If winters stay above 5°F the Mega is the cheaper way to heat the same room.