LG · Model LW1223ERSM-RFB
12,000 BTU Refurbished Wi-Fi Enabled Window Air Conditioner
A window air conditioner rated at 12,000 BTU for rooms up to 550 sq ft. It self-installs in a window and connects to Wi-Fi for app control.
$319
Live price at SylvanePrice checked Sep 30, 2026
Performance
- Cooling capacity
- 12,000 BTU · 3.5 kW
- Heating capacity
- Cooling only
- Room coverage
- up to 550 sq ft
- Energy Star
- Not published
- CEER
- Not published
- Annual energy (cooling)
- Not published
Noise, size & features
- Model number
- LW1223ERSM-RFB
- Indoor noise
- 53 dB(A)about as loud as a dishwasher
- Outdoor noise
- Not published
Refrigerant is from Sylvane's published specifications for this exact configuration, checked Sep 26, 2026.
What is good
- At $319 it undercuts 34 of the 34 other 12,000-14,000 BTU window units we list with a live price.
- Uses R-32 (GWP 675), the low-GWP class new US residential equipment moved to.
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.
Self-fit, no pro needed
R-32
Common questions about the LG 12,000 BTU Refurbished Wi-Fi Enabled Window Air Conditioner
- How loud is the LG 12,000 BTU Refurbished Wi-Fi Enabled Window Air Conditioner?
- 53 dB(A) indoors, about as loud as a dishwasher.
- What size room does the LG 12,000 BTU Refurbished Wi-Fi Enabled Window Air Conditioner cool?
- It is rated to cool a room up to 550 sq ft (12,000 BTU · 3.5 kW).
- Do I need a professional to install the LG 12,000 BTU Refurbished Wi-Fi Enabled Window Air Conditioner?
- No. It is a window unit you can fit yourself, no professional needed. Usually no permit.
Is a window even the right type?
Compare windows against the other types on price, noise, efficiency and install.
Buying guides for a window unit like this
The questions buyers ask, answered from live prices and real specs. See where a window unit like this fits.
