Nothing tests a household’s patience quite like a fifty degree morning in October after the AC has been the only climate control running since June, and the space heater from last winter is buried somewhere in the garage behind holiday decorations. That yearly scramble is exactly why combo units exist, and LG has built one of the most consistent lineups of window and through the wall units that handle both jobs without forcing you to store two separate machines. After comparing the current LG catalog specifically for genuine heat capable models, here is my honest pick for the best lg air conditioner with heater in 2026, covering everything from compact bedroom units to large capacity models built for bigger rooms.
Buying Guide: Choosing an LG Air Conditioner with Heater
LG’s heat capable units use what the brand calls supplemental heat, which is genuinely important to understand before buying. Supplemental heat is designed to take the edge off cooler shoulder season days, not to replace your home’s primary furnace during a real winter. If you are looking to eliminate a separate heating system entirely, this category of product is not built for that job, but if you want to skip running a space heater during that awkward stretch between summer and full winter, it works well.
Voltage requirements vary significantly across LG’s lineup and matter more than most buyers expect. Smaller units in the 7,600 to 12,200 BTU range often run on standard 115V household outlets, while larger units at 18,000 BTU and above typically require a dedicated 230V or 208V circuit with a specific plug type. Confirm your home’s wiring before purchasing anything above the entry level capacity.
Mounting style is worth considering based on your specific space. Window units are the most common and easiest to install without permanent modification, while through the wall units require a proper wall sleeve but free up the window entirely and can look more built in for a permanent installation.
Room coverage should be matched carefully to BTU rating. LG’s own coverage estimates range from 150 square feet on the smallest units up to 1,440 square feet on the largest window models, so oversizing or undersizing either wastes energy or leaves the room uncomfortable.
Smart features have become a genuine differentiator within LG’s own lineup. ThinQ enabled models let you control temperature and mode remotely through the app or voice assistants like Alexa and Google Assistant, while standard models rely on the included remote and onboard panel only. If you want scheduling flexibility or plan to pre-heat or pre-cool a room before arriving, prioritize the ThinQ models.
1. LG 23,000 BTU Smart Window Air Conditioner with Heat
This is LG’s flagship smart combo unit, rated to cool rooms up to 1,440 square feet, making it one of the largest single unit options for a big living room, open concept space, or finished basement. ThinQ technology lets you start or stop cooling, change modes, or adjust temperature remotely from your phone, and it also works with Alexa and Google Assistant for voice commands. The supplemental heat option adds year round usability for cooler days, and two cooling, heating, and fan speeds give reasonable flexibility for a unit this size. Auto Restart brings the unit back to its previous settings automatically after a power outage, which matters more the larger and more expensive the unit gets.
Pros:
- Covers up to 1,440 square feet, among the largest on this list
- ThinQ app and voice assistant control included
- Auto Restart preserves settings after power outages
- Two dedicated heating speeds for genuine supplemental warmth
Cons:
- Requires a dedicated 230V circuit rather than standard household power
- Heavy at 141 pounds, making installation a two person job
2. LG 18,000 BTU Window Air Conditioner with Heat
Sitting a step below the flagship model, this 18,000 BTU unit covers up to 1,000 square feet, a strong fit for a large bedroom, den, or multi room basement space. It requires a special 230/208V LCDI plug, so checking your electrical setup ahead of time is worth the extra few minutes. Four way air deflection spreads conditioned air more evenly across a larger room than simpler louver designs, and the digital control panel paired with remote control keeps operation straightforward. A 24 hour on and off timer combined with a filter light reminder helps keep the unit running efficiently without requiring you to remember maintenance on your own.
Pros:
- Covers up to 1,000 square feet for larger rooms
- Four way air deflection improves even air distribution
- Filter light reminder helps maintain efficient operation
- 24 hour programmable timer for flexible scheduling
Cons:
- Requires the same special 230/208V LCDI plug as the larger flagship unit
- No ThinQ smart app connectivity on this particular model
3. LG LW1223HRSM 12,200 BTU Window Air Conditioner with Heat
This model strikes a genuinely useful middle ground, covering up to 570 square feet with ThinQ technology included even at this mid range capacity. That means you get remote start and stop, mode changes, and temperature adjustments from your phone without stepping up to the largest and most expensive units in the lineup. Two cooling, heating, and fan speeds paired with a 24 hour programmable timer give solid control, and electronic controls with a remote let you manage supplemental heating from across the room. Auto Restart rounds out the practical feature set, automatically restoring your settings after any power interruption.
Pros:
- ThinQ smart app control included at a mid range price point
- Covers up to 570 square feet, suited for bedrooms and living rooms
- 24 hour programmable timer for flexible scheduling
- Auto Restart preserves settings after power outages
Cons:
- Two fan speeds is fewer than some competing models offer
- Still requires 230/208V power depending on the specific listing variant
4. LG 11,800 BTU Through the Wall Air Conditioner and Wall Heater
For anyone who wants to free up their window entirely, this through the wall unit covers up to 550 square feet and installs into a proper wall sleeve rather than a window frame. Four way air deflection gives the same flexibility found on LG’s larger window units, and the digital control panel paired with remote control keeps day to day operation simple. A trim kit and removable washable filter come included, which helps keep the installation looking clean and finished rather than makeshift. This is a strong option for a permanent installation in a bedroom or home office where you do not want a window unit blocking the view or natural light.
Pros:
- Frees up window space entirely with through the wall installation
- Four way air deflection for even room coverage
- Includes trim kit for a clean, finished look
- Filter light reminder simplifies maintenance
Cons:
- Requires a proper wall sleeve, making installation more involved than a window unit
- Heavier and more permanent than a window mounted alternative
5. LG 10,000 BTU Through the Wall Air Conditioner with Supplemental Heat
This slightly smaller through the wall model covers up to 450 square feet, making it a good fit for a standard bedroom or home office that still benefits from a permanent wall installation rather than a window unit. Like its larger sibling, it includes four way air deflection, a digital control panel with remote, and a trim kit for a finished appearance once installed. Auto Restart automatically returns the unit to its previous settings after a power outage, and the removable washable filter keeps ongoing maintenance simple. For anyone replacing an aging through the wall sleeve unit with something that adds genuine heating capability, this is a straightforward upgrade path.
Pros:
- Frees up window space with permanent wall installation
- Four way air deflection for flexible airflow direction
- Includes trim kit and washable filter for easy upkeep
- Auto Restart preserves settings after power interruptions
Cons:
- 450 square foot coverage limits it to smaller to medium rooms
- Requires proper wall sleeve installation rather than a simple window mount
6. LG 7,600 BTU Window Air Conditioner with Heat
For a standard bedroom or home office, this compact 7,600 BTU unit covers up to 330 square feet and runs on standard 115V power, making it one of the more accessible options on this list from an installation standpoint. Noise stays low at a claimed 52 dB on low mode, which is quiet enough for overnight use without being distracting. The slide in-out chassis simplifies installation compared to bulkier units, and a 24 hour timer combined with Auto Restart rounds out a genuinely practical feature set for a smaller space. This is a sensible pick for anyone who wants LG’s heat and cool combo functionality without stepping up to a larger, more expensive, or higher voltage unit.
Pros:
- Runs on standard 115V power, no special outlet needed
- Quiet operation as low as 52 dB on low mode
- Slide in-out chassis simplifies installation
- Budget friendly entry point into LG’s heat capable lineup
Cons:
- 330 square foot coverage limits it to smaller rooms
- Only two fan speeds compared to three on some other LG models
7. LG Smart Window Air Conditioner with Heat LW8023HRSM (Renewed)
This renewed model brings ThinQ WiFi connectivity down to a genuinely budget friendly price point, delivering 7,600 BTU of cooling alongside 3,850 BTU of supplemental heat for rooms up to roughly 330 square feet. Intelligent Energy Save mode cycles the compressor and fan automatically once the room reaches its target temperature, which helps reduce power draw without sacrificing steady comfort. Four way air deflection directs airflow left, right, up, or down so conditioned air reaches every corner of a smaller room evenly, and the 24 hour programmable timer combined with Auto Restart brings the same convenience features found on LG’s full price models.
Pros:
- ThinQ smart app and voice control at a renewed unit price point
- Intelligent Energy Save mode reduces power draw automatically
- Four way air deflection for even coverage in smaller rooms
- Significant savings compared to buying new
Cons:
- Renewed condition carries a shorter 90 day limited warranty
- Smaller 330 square foot coverage limits it to compact rooms
8. LG 23,000 BTU 230V Window Air Conditioner with Supplemental Heat
Rounding out this list, this large capacity unit covers up to 1,400 square feet with a 9,200 to 11,200 BTU heating range depending on conditions, making it another strong option for sizable rooms or open living spaces. Noise stays as low as 62 dB on low mode, and the two cooling, heating, and fan speeds allow reasonable customization for a unit this size. Auto Restart automatically returns the unit to its prior settings after any power failure, which is especially useful for a unit this large that you do not want to manually reconfigure every time. This model represents a solid alternative to the flagship smart unit for anyone who does not need app connectivity and wants to save on that added cost.
Pros:
- Covers up to 1,400 square feet for large rooms
- Auto Restart preserves settings after power outages
- Two dedicated heating speeds for genuine supplemental warmth
- More affordable than the ThinQ enabled flagship at similar capacity
Cons:
- Higher noise level at 62 dB compared to smaller units on this list
- No smart app connectivity, relying on remote and panel controls only
Choosing the best LG air conditioner with heater really comes down to matching room size with how much smart control you actually want. For larger rooms, the 23,000 and 18,000 BTU window units deliver serious capacity, while the through the wall options make sense for anyone wanting a permanent installation that frees up the window entirely. Smaller bedrooms and offices are well served by the 7,600 and 12,200 BTU models, especially if ThinQ app control is a priority. Whichever size you land on, remember that supplemental heat is meant to ease the shoulder seasons, not replace your primary heating system through a full winter.
