How loud is the LG 8,000 BTU Through-the-Wall Air Conditioner?

56 dB(A) indoors, about as loud as a dishwasher.

What size room does the LG 8,000 BTU Through-the-Wall Air Conditioner cool?

It is rated to cool a room up to 340 sq ft (8,000 BTU · 2.3 kW).

Do I need a professional to install the LG 8,000 BTU Through-the-Wall Air Conditioner?

Not to replace a unit, but usually yes for a new opening. Sliding it into an existing wall sleeve it fits is a job you can do yourself (it is heavy, so plan on two people), with no refrigerant work. A new installation means cutting an opening through an exterior wall and fitting a sleeve, which is contractor work and usually needs a building permit.

Through-the-wall unit

LG · Model LT0816CER

8,000 BTU Through-the-Wall Air Conditioner

A through-the-wall air conditioner rated at 8,000 BTU for rooms up to 340 sq ft. It installs in a wall sleeve.

$549

Live price at Sylvane

Price checked Sep 27, 2026

Buy at Sylvane

Price history at Sylvane

Lowest since Jul 25, 2026:$479on Jul 30, 2026

Tracked price is up since Jul 25, 2026

Based on 51 prices we have recorded since Jul 25, 2026, not a market average.

Will it cool your room?

Room size 500 sq ft ≈ 46.5 m²

Undersized for 46.5 m²

This is undersized for your 500 sq ft room. It would run flat out and struggle to keep up.

At a glance

Best for replacing a through-the-wall unit in an existing wall sleeve.

Cooling

2.3 kW

Size

Average

Noise

56 dB

Audible

Install: Slides into a wall sleevePermission: A new wall opening usually needs a permit

Performance

Cooling capacity: 8,000 BTU · 2.3 kW
Heating capacity: Cooling only
Room coverage: up to 340 sq ft
Energy Star: Not published
CEER: Not published
Annual energy (cooling): Not published

Noise, size & features

Model number: LT0816CER
Indoor noise: 56 dB(A)about as loud as a dishwasher
Outdoor noise: Not published
Indoor unit: 24 x 14.4 x 20.09 in
Outdoor unit: None
Refrigerant: R-32
Wi-Fi / app: Not published
Outdoor unit needed: No
Wall sleeve: Fits 26 in. standard sleeves (25½ to 27 in.)
Warranty: 1-Year Limited Warranty

Will it fit your wall sleeve?

LG's manual lists the existing sleeves it fits (25½ to 27 inches wide, from Frigidaire, GE/Hotpoint, Whirlpool, Fedders/Emerson, Carrier and Friedrich), but LG strongly recommends a new LG sleeve and says an existing sleeve's rear louvers must be redirected. LG's own sleeve is the AXSVA1, or the AXSVA4 with a stamped grille (about 25⅞ x 15½ x 16¾ in.). Source: LG owner's manual (hosted by P.C. Richard)

Every through-the-wall AC and PTAC by the sleeve it fits

Installation & the rules that apply

This is a through-the-wall air conditioner. It sits in a sleeve built into an exterior wall, so the window-unit mounting and bracket rules do not apply to it. Swapping it into an existing sleeve is a like-for-like replacement; cutting a new opening changes the building's exterior wall, which usually needs a building permit and, in a condo, co-op or historic building, approval first.

Installation

Slides into a wall sleeve

Refrigerant

R-32

GeneralRenters: get written landlord consent firstReviewed June 2026Often blocks install

GeneralCondo / HOA: exterior changes need approvalReviewed June 2026Permit required

GeneralHistoric / listed buildings: consent before any exterior unitReviewed June 2026Permit required

MassachusettsMassachusetts: local historic district approval (MGL c.40C)Reviewed June 2026Permit required

United StatesUS: local mechanical and electrical permits (vary by city)Reviewed June 2026Permit required

See full rules by region

Common questions about the LG 8,000 BTU Through-the-Wall Air Conditioner

How loud is the LG 8,000 BTU Through-the-Wall Air Conditioner?: 56 dB(A) indoors, about as loud as a dishwasher.
What size room does the LG 8,000 BTU Through-the-Wall Air Conditioner cool?: It is rated to cool a room up to 340 sq ft (8,000 BTU · 2.3 kW).
Do I need a professional to install the LG 8,000 BTU Through-the-Wall Air Conditioner?: Not to replace a unit, but usually yes for a new opening. Sliding it into an existing wall sleeve it fits is a job you can do yourself (it is heavy, so plan on two people), with no refrigerant work. A new installation means cutting an opening through an exterior wall and fitting a sleeve, which is contractor work and usually needs a building permit.