How loud is the LG LW1522IVSM Dual Inverter?

44 dB(A) indoors, about as loud as a quiet library.

How energy-efficient is the LG LW1522IVSM Dual Inverter?

Its efficiency rating is CEER 14.7, and it is ENERGY STAR certified.

What size room does the LG LW1522IVSM Dual Inverter cool?

It is rated to cool a room up to 700 sq ft (14,000 BTU · 4.1 kW).

Do I need a professional to install the LG LW1522IVSM Dual Inverter?

No. It is a window unit you can fit yourself, no professional needed. Usually no permit.

Window unitENERGY STAR

LW1522IVSM Dual Inverter

14,000 BTU LG Dual Inverter window AC rated CEER 14.7 and Energy Star certified, sized to cool large rooms up to 700 sq ft with WiFi control.

$498

Live price at Abt Electronics

Price checked Sep 24, 2026

Buy at Abt Electronics In stock

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Price history at Abt Electronics

Lowest since Jul 25, 2026:$498on Aug 16, 2026

Currently the lowest price we have tracked at Abt Electronics since Jul 25, 2026down from $522 on Aug 15, 2026

Based on 48 prices we have recorded since Jul 25, 2026, not a market average.

Will it cool your room?

Room size 150 sq ft ≈ 13.9 m²

More than you need for 13.9 m²

This has more cooling than your 150 sq ft room needs. It can short-cycle and leave the air cool but humid.

Running costest.

~$130/year

Estimated from ENERGY STAR's published annual energy use at about 750 hours of cooling a year (the DOE test standard) and the US average electricity price of 18.44¢/kWh (U.S. Energy Information Administration, Electric Power Monthly Table 5.6.A (residential average, May 2026)). A standardized figure for comparison; your real cost depends on how much you run it, your local rate and your climate.

Local rates vary widely (about 15¢/kWh in Florida to 33¢ in California), and hotter regions run their AC more hours, so your real cost differs.

At a glance

Best for large rooms and open-plan spaces.

Cooling

4.1 kW

Size

Large

Noise

44 dB

Audible

Install: Self-fit, no pro neededPermission: Usually no permit

Performance

Cooling capacity: 14,000 BTU · 4.1 kW
Heating capacity: Cooling only
Room coverage: up to 700 sq ft
Energy Star: Yes
CEER: 14.7
Annual energy (cooling): 714 kWh

Noise, size & features

Model number: LW1522IVSM
Indoor noise: 44 dB(A)about as loud as a quiet library
Outdoor noise: Not published
Indoor unit: 15.0 x 23.6 x 28.8 in (HxWxD)
Outdoor unit: None
Refrigerant: R-32
Wi-Fi / app: Yes
Outdoor unit needed: No

What is good

Large 14,000 BTU, cools up to 700 sq ft
CEER 14.7, Energy Star certified, well above the DOE minimum
Dual Inverter for quiet, efficient cooling
R-32 refrigerant and ThinQ WiFi

What to watch

Heavy (about 85 lb) and large chassis
Needs a wider, sturdier window
44 dB on low fan

Installation & the rules that apply

This is a window unit. No EPA Section 608 technician is needed: the refrigerant circuit is factory-sealed and never opened. A plug-in window unit needs no permit, so the friction is with your building rather than the government. Many HOAs restrict window units on appearance grounds, though an HOA regulating how you mount one stands on much firmer ground than one banning cooling outright. Landlords can set conditions, and the falling hazard is taken seriously: New York City, for instance, requires window units to be supported by brackets or mounting rails, and many building insurers and HOAs now require a bracket regardless of city.

Installation

Plug and play

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 LW1522IVSM Dual Inverter

How much does the LG LW1522IVSM Dual Inverter cost to run per year?: About $130 a year. Estimated from ENERGY STAR's published annual energy use at about 750 hours of cooling a year (the DOE test standard) and the US average electricity price of 18.44¢/kWh (U.S. Energy Information Administration, Electric Power Monthly Table 5.6.A (residential average, May 2026)). A standardized figure for comparison; your real cost depends on how much you run it, your local rate and your climate.
How loud is the LG LW1522IVSM Dual Inverter?: 44 dB(A) indoors, about as loud as a quiet library.
How energy-efficient is the LG LW1522IVSM Dual Inverter?: Its efficiency rating is CEER 14.7, and it is ENERGY STAR certified.
What size room does the LG LW1522IVSM Dual Inverter cool?: It is rated to cool a room up to 700 sq ft (14,000 BTU · 4.1 kW).
Do I need a professional to install the LG LW1522IVSM Dual Inverter?: No. It is a window unit you can fit yourself, no professional needed. Usually no permit.