LG LT1430CNR Review: 14,000 BTU 230V Through-the-Wall AC
LG's largest cooling-only wall unit, rated 14,000 BTU for rooms up to 700 sq ft, with a 230/208V NEMA 6-20 plug, a 58 dB listed sound level and a remote.
By Daniel Brooks
Updated October 19, 2026
The LG LT1430CNR is LG’s big-room cooling-only wall unit. It is rated at 14,000 BTU for rooms up to 700 square feet, uses the same 24 inch universal chassis as LG’s smaller through-the-wall models, and runs on a 230/208 volt circuit with a NEMA 6-20 plug. It is one of the most established large units in our cooling-only through-the-wall air conditioners category, with a 3.7 out of 5 average from 212 ratings.
Our Verdict
For a large living room, an open-plan apartment or a big primary suite with an existing sleeve and a 230 volt outlet, the LT1430CNR is a safe, familiar pick. LG matches it to rooms of about 30 by 25 feet, and it brings three cooling and fan speeds, Auto Cool, 4-way air deflection, a 24 hour timer, auto restart, a filter reminder and a remote.
Among 14,000 BTU wall units, its listed 58 dB is on the quieter side. The trade-offs are a 1500 watt draw, an efficiency figure of 9.3 that trails LG’s smaller models, no Wi-Fi or heat, and a sleeve that is sold separately.
LG 14,000 BTU Through the Wall Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | LG |
| Model | LT1430CNR |
| Type | Cooling-only through-the-wall air conditioner |
| Cooling Capacity | 14,000 BTU |
| Room Size | Up to 700 sq ft |
| Power | 230/208 volts, 1500 watts, NEMA 6-20 plug |
| Efficiency | 9.3 (listed) |
| Refrigerant | R-32 |
| Noise Level | 58 dB (listed) |
| Thermostat Range | 60 to 86 degrees F |
| Dimensions | 24 x 14.4 x 20.1 inches (W x H x D) |
| Weight | 77 pounds |
| Wall Sleeve | Sold separately |
| Warranty | 1 year parts and labor |
Cooling Capacity and Room Size
LG rates the LT1430CNR for rooms up to 700 square feet and describes it as ideal for rooms around 30 by 25 feet. That lines up with the 14,000 BTU band in the ENERGY STAR chart below. It suits living rooms with a dining area, open kitchens and family rooms, large primary bedrooms and home offices that run warm from equipment.
Because it is a big compressor in a compact chassis, it pulls a room down quickly. Just avoid putting it in a small bedroom, where an oversized unit will cool the air fast but cycle off before it removes much humidity, leaving the room feeling clammy.
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Adjust for your room: reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
Power Requirements
This is the most important check before you buy. LG says the unit requires a 230/208 volt LCDI plug of the NEMA 6-20 type. That is a different receptacle from a standard household outlet, and it needs a suitable circuit behind it. Many apartment wall sleeves already have one, because large wall units are common in multifamily buildings. If yours does not, an electrician will need to add it.
At 1500 watts, the LT1430CNR is LG’s highest-draw wall unit, but on a 230 volt circuit that load is routine.
Installation and Sleeve Fit
The chassis is 24 inches wide, 14.4 inches tall and 20.1 inches deep, so it fits the same universal sleeves as LG’s smaller wall units. That makes it a straightforward upgrade if your building already has the right outlet. The box includes the remote, a mesh filter, a trim kit and the manual. The sleeve is sold separately, and at 77 pounds you will want a second person to lift it in.
Noise and Efficiency
LG lists 58 dB. That is a reasonable figure for a 14,000 BTU conventional unit, and lower than some rivals in this capacity class list. It is comfortable for living spaces and workable in a large bedroom on low fan speed.
The listed efficiency of 9.3 is typical for large wall units but lower than LG’s smaller models. If your room is well under 700 square feet, a smaller unit will cost less to run. Energy saving options include the 24 hour on and off timer and an energy saving mode, which LG suggests pairing with a schedule to avoid cooling an empty room.
Controls and Everyday Use
The digital control panel and remote handle three cooling and fan speeds plus Auto Cool, which adjusts fan speed to hold your set temperature. The thermostat runs from 60 to 86 degrees F. Dry mode helps on humid days, 4-way air deflection aims the airflow, and the filter light reminds you to clean the washable filter. Auto restart returns the unit to its previous settings after a power outage. There is no app or voice control.
Sizing Mistakes to Avoid
Bigger is not always better with a wall unit. A unit that is far too large for the room cools the air in short bursts, then shuts off before it has run long enough to pull moisture out. The room hits the set temperature but still feels damp. If your room is closer to 450 square feet than 700, look at a 10,000 or 12,000 BTU class unit instead.
The opposite mistake is common in open-plan apartments. If the LT1430CNR has to cool a living room that opens onto a kitchen and hallway, count the whole open area, not just the room with the sleeve, and use the chart’s kitchen adjustment where it applies.
Who It Suits Best
The LT1430CNR suits large rooms with an existing sleeve and a 230/208 volt outlet, and it is a natural replacement for an older large wall unit in an apartment or condo. It is less suited to small rooms, homes with only standard outlets, or anyone who wants smart control or winter heat.
Pros and Cons
| Pros | Cons |
|---|---|
| 14,000 BTU for up to 700 sq ft | Needs a NEMA 6-20 outlet |
| 58 dB listed for a large unit | Efficiency below smaller LG units |
| Fits LG’s universal 24 inch chassis | Wall sleeve sold separately |
| Auto Cool, timer and auto restart | No Wi-Fi or app |
| R-32 refrigerant | Heavy at 77 pounds |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Living rooms up to 700 sq ft | Small bedrooms |
| Apartments with a 230V sleeve outlet | Homes with only standard outlets |
| Replacements for older big wall units | Smart home users |
| Open-plan kitchens and family rooms | Rooms that need heat |
For more options, see our picks for the best 14,000 BTU through-the-wall air conditioners and the best 230V through-the-wall air conditioners.
Final Verdict
The LG LT1430CNR is a dependable, relatively quiet way to cool rooms up to 700 square feet through a standard 24 inch sleeve. If your wall already has a 230/208 volt outlet, it is one of the simplest big-room upgrades available. Choose a smaller unit for bedrooms. You can check the current price and details for the LG 14,000 BTU Through the Wall Air Conditioner.
Frequently Asked Questions
What plug does the LG LT1430CNR use?
It needs a 230/208 volt LCDI plug of the NEMA 6-20 type.
What size room does it cool?
LG rates it for rooms up to 700 square feet, about 30 by 25 feet.
Does it fit the same sleeve as smaller LG wall units?
Yes. It uses the same 24 inch wide chassis, and LG designs it to fit most universal sleeves.
How loud is it?
LG lists 58 dB.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.