LG LT1236CER 11,800 BTU 230v Through-the-Wall Air Conditioner

The LG LT1236CER is a powerful 11,800 BTU through-the-wall air conditioner designed to efficiently cool medium to large rooms. Operating on 230 volts, this unit offers reliable performance and energy efficiency, making it an ideal choice for residential or commercial spaces. With its sleek design, it seamlessly integrates into your wall, saving window space while providing optimal airflow. The unit features multiple cooling and fan speeds, allowing for customized comfort, and a programmable timer for added convenience. Its energy-saving mode helps reduce electricity costs, while the easy-to-use remote control ensures effortless operation from anywhere in the room. Enjoy a refreshing and comfortable environment with the LG LT1236CER air conditioner.

• 11,500/11,800 BTU

• Universal Fit for Sleeve
• Remote Control
• Timer 24 Hr. On/Off
• Wall Sleeve Sold Separately
• Remote Control
• 3 Cooling & Fan Speeds
• Trim Kit Included
• Estimated Cooling Area 530 Sq. Ft
• Maximum Cooling
• Maximum Usability
• Installation Made Easy

3-in-1 Operation

Use cool mode for powerful cooling and dehumidifying on hot days. In fan mode, the fan circulates the air in the room. Dry mode is ideal for damp, rainy days.

Universal Fit for Sleeve (Sold Separately)

LG's universal thru-the-wall air conditioners fit competitive wall sleeves (26" standard size)

Why should you buy LGLT1236CER?

• Powerful Cooling: 
  It offers 11,500 or 11,800 BTUs of cooling power, suitable for spaces up to 530-540 sq. ft.
• Convenient Features: 
  Includes a full-function remote, a 24-hour on/off timer, and a filter light reminder to help you manage and maintain the unit.
• Durability: 
  The Gold Fin anti-corrosion coating is designed to protect the unit and extend its lifespan.
• Versatile Operation: 
  Provides three modes: cool, fan, and dry, and features four-way air deflection to distribute air evenly.
• Universal Design: 
  Its universal design fits standard 26-inch (or 24-27 inch) wall sleeves, and a trim kit is included.

Frequently Asked Questions by Customers

• Will this unit cool a large room effectively?
  Yes — it is rated to cool up to about 530 square feet. However, some users say it struggles a bit when it’s very hot outside or under poor insulation.
• What are the voltage / electrical power requirements?
  It requires 208/230 V power.
  Rated current is ~ 5.5/5.0 A in cooling operation.
  Power consumption is ~ 1,080‑1,110 watts.
• What about noise levels? Is it loud?
  Indoor sound level is ~ 59 dB; outdoor ~ 65 dB.
  Some users find the unit fairly quiet; others report noticeable noise or vibrations. Particularly, the front grille and plastic parts may vibrate
• How is it with air direction / comfort features?
  Has 4‑way air deflection, allowing adjustment of cooling airflow.
  Washable air filter; there’s a filter alert (reminder) to clean it.
  Energy Saver mode, timer, remote control included.
• Is the sleeve / installation hardware included?
  Trim kit is included.
  The wall sleeve is not always included. Some users report issues fitting into sleeves that are mismatched.

Pros

• Strong Cooling Capacity
  Rated 11,500–11,800 BTU (cooling) and good for rooms up to ~530 sq ft.
• Efficient Electrical Rating
  Operates on 208/230 V, draws ~5.5/5.0 A, consuming ~1,080–1,110 watts in cooling mode.
• Multiple Fan / Cooling Modes
  Has 3 cooling speeds, 3 fan speeds, a “dry” or dehumidification mode to remove moisture (≈3.9 pints/hr), and fan-only operation.
• Good Air Distribution
  Four-way air deflection helps spread cooled air more evenly in the room, reducing hot spots.
• Useful Features & Controls
  Comes with a remote control; timer (24 hr on/off); auto-restart after power interruption; energy-save function; clean-filter alarm.
• Durability & Build
  Has “Gold Fin” anti-corrosion treatment to protect internal components from environmental damage.
• Trim Kit Included
  For finishing the installation neatly. (However, note the wall sleeve is sold separately.)
• Adequate Airflow & Comfort
  Dry air flow is ~265 CFM; noise levels are ~59 dB indoors (high speed), ~65 dB outdoors or at higher output; acceptable for many uses.

Cons

• Wall Sleeve Not Included
  Though the trim kit comes with the unit, the actual sleeve required to mount it in a wall is not included, which means extra cost/effort.
• No Heating Function
  This model is cooling only (plus fan/dry modes). If you need heating in addition, you’ll need a separate unit or a different model.
• Energy Star Qualification: None
  The LT1236CER is not Energy Star certified. This might mean higher running cost compared to equivalent models that are certified.
• Noise
  While the noise isn’t excessive, at high settings (~59 dB indoors, somewhat louder outdoors) it may be noticeable, especially in quieter settings or during the night.
• Size / Weight / Installation Requirements
  The unit is heavy (~82 lbs net, ~91 lbs shipping) and fairly large in dimension (~24 × 14.4 × 20.1 in), so installation needs a proper wall cut-out or existing through-wall opening, with structural support. Electrical supply must be 230 V.
• Moderate Efficiency Ratios
  CEER ~10.5, EER ~10.6 — not poor, but not top-tier compared to some newer or more premium AC units. Users looking for maximum efficiency might find better elsewhere.

Conclusion

The LG LT1236CER is a solid and powerful through-the-wall air conditioner for someone who needs strong cooling in a medium-to-large sized room. If your space is around ~450–550 sq ft, this unit delivers enough cooling, has useful features for comfort (fan modes, timer, energy saver, filter alerts), and is built with durability in mind (Gold Fin, 4-way deflection).