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U-shaped window air conditioners are one of the better room-cooling upgrades available in 2026 because they solve two of the biggest complaints homeowners have with standard window units: noise and air leakage. The window sash drops into the center channel of the unit, leaving the noisy compressor side mostly outside and the fan/control side inside. That split geometry usually makes the unit quieter, better sealed, and more comfortable for bedrooms, offices, apartments, garage workrooms, and supplemental cooling zones.
The short answer: a U-shaped window AC is worth considering if you have a compatible double-hung or single-hung window, a sound frame, a nearby properly rated outlet, and a room in the 250 to 550 square foot range. Most mainstream U-shaped inverter models cost about $300 to $600, with premium or specialty saddle-style units sometimes reaching $550 to $1,000 or more. Professional installation commonly adds $130 to $300 for labor, and total installed cost often lands between $300 and $1,100 depending on the unit, window condition, floor level, electrical work, and local requirements.
On our job sites, we treat these as more than plug-in appliances. A 60- to 80-pound machine hanging in a window is a small structural, weatherproofing, and electrical project. If the bracket is out of level, the sill is soft, or the side gaps are poorly sealed, the best U-shaped AC on the shelf will perform like an average unit and may create water, vibration, or safety problems.
What Makes a U-Shaped Window AC Different?
A standard window air conditioner is a rectangular box that sits across the window opening. The indoor blower and outdoor compressor are packed into one chassis, so vibration and compressor noise travel directly into the room. A U-shaped air conditioner changes that layout. The center of the unit is recessed, creating a slot where the window sash can close down between the indoor and outdoor sections.
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That design gives you four practical advantages. First, it reduces direct noise transmission because the glass sash becomes a partial barrier between the compressor and the room. Second, it improves the air seal when installed correctly because the window closes into the unit instead of resting above a large rectangular box. Third, many U-shaped units use inverter compressors, which ramp up and down instead of hard cycling on and off. Fourth, many models allow the window to be opened partially when the unit is installed, though that feature depends on the exact model and installation.
#1 Best Overall
- ULTRA QUIET - The U-shape design of Midea U Smart Inverter AC uses your window to block noise outside. The highly-efficient inverter system warrants ultra-low noise and vibration, 9x quieter than traditional units with operation as low as 32 dBA.
- MORE THAN 37% ENERGY SAVINGS - With the advanced DC Inverter technology, Midea U window air conditioner achieves over 37% energy savings compared to other traditional units. It is the first window AC to obtain the ENERGY STAR Certification.
- SMART CONTROL - Midea U Smart Inverter air conditioner is Wi-Fi enabled and can be controlled from anywhere using the SmartHome app on iOS or Android. You can also use voice commands throughout your house, office, or apartment using Alexa or Google Assistant devices.
- FLEXIBLE WINDOW OPENING - The U-shaped design allows your window to open, bringing fresh air into your home and maintaining more of your view when the window air conditioner is installed. When the window is closed, the Anti-Theft Mechanism locks the window for added safety.
- ROBUST INSTALLATION - Install the included quick-snap bracket, set the air conditioner on the bracket, and secure the sidearms. Then you are all done and ready to enjoy. Available for single-hung or double-hung windows with width 22"-36", minimal height at 13.75".
The tradeoff is installation complexity. A U-shaped unit usually requires a dedicated support bracket, careful leveling, sash alignment, side-panel sealing, and more precise fitment than a basic 5,000 BTU window unit. The shape is awkward to handle, especially on upper floors. Two people should set the unit in place, and above the first floor we prefer a professional or at least a second person inside the room with no one standing below the work area.
Best Uses for U-Shaped Window Air Conditioners
U-shaped ACs are best for one-room comfort, not whole-home conditioning. They work especially well in bedrooms, nurseries, home offices, apartment living rooms, finished attic rooms, ADUs, and garage offices where noise matters and the space is used for several hours at a time.
They are also a strong fit for homes where central AC is too expensive to add or replace. A central air installation or replacement usually runs into the thousands of dollars. A U-shaped window unit, by comparison, is a room-by-room solution that usually stays in the few-hundred-dollar range for the unit and basic labor. That makes it attractive for targeted cooling, rentals, older homes without ducts, and rooms that run hotter than the rest of the house.
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What Size U-Shaped AC Do You Need?
Most homeowners start with BTU, which is correct, but BTU is only the first filter. A common 8,000 BTU U-shaped model is typically rated for rooms up to about 350 square feet. A 10,000 BTU unit commonly targets around 450 square feet. A 12,000 BTU unit commonly covers about 550 square feet. Those numbers assume reasonable ceiling height, average insulation, and normal heat gain.
Use the room’s square footage as the baseline: length times width. A 12-foot by 15-foot bedroom is 180 square feet. A 16-foot by 22-foot home office is 352 square feet. Then adjust for real conditions. Step up one size when the room has west-facing glass, poor insulation, top-floor heat gain, 9- or 10-foot ceilings, several occupants, large electronics, or kitchen equipment. Stay conservative if the room is shaded, well insulated, and used mostly at night.
Oversizing is a common mistake. A unit that is too large may cool the air quickly but run short cycles, leaving humidity behind. A right-sized inverter unit generally feels better because it can run longer at lower output, holding a steadier temperature and pulling more moisture from the air.
| Room Size | Typical U-Shaped AC Size | Best Fit | Notes |
|---|---|---|---|
| 150-250 sq ft | 6,000-8,000 BTU | Small bedroom, nursery, compact office | Check minimum window width before buying. |
| 250-350 sq ft | 8,000 BTU | Bedroom, den, apartment room | Common sweet spot for quiet cooling. |
| 350-450 sq ft | 10,000 BTU | Larger bedroom, office, small living room | Good for sunny rooms with moderate heat gain. |
| 450-550 sq ft | 12,000 BTU | Large room, open living area, top-floor space | Confirm circuit capacity and unit weight. |
Efficiency: Inverter, ENERGY STAR, and CEER
The main efficiency upgrade in current U-shaped window units is the inverter compressor. Older window ACs often run in a simple on/off pattern: full blast, shut down, full blast again. Inverter units vary compressor speed, so they can maintain a steadier room temperature with less noise and fewer hard starts. In practice, that matters most in bedrooms and rooms where the AC runs many hours per day.
When comparing units, look for ENERGY STAR certification and the CEER rating. CEER stands for Combined Energy Efficiency Ratio. It accounts for cooling efficiency during operation plus standby power. The higher the CEER, the more cooling you get per watt of electricity. Federal efficiency standards have continued to tighten, and by 2026 minimum CEER requirements for room ACs are higher than older units many homeowners still have in storage. Smaller units under 8,000 BTU moved to a higher minimum benchmark reported as 12.8 in industry summaries.
Typical window AC operating draw ranges from about 500 to 1,500 watts depending on BTU size, CEER, fan speed, outdoor temperature, room heat gain, and runtime. Monthly operating cost commonly ranges from about $12 to $120. The lower end is a smaller efficient unit used part-time in a mild climate. The upper end is a larger unit running many hours per day in high heat, high humidity, or a room with air leaks.
One construction point gets missed in many buying decisions: efficiency is not just the label on the box. Field sealing decides whether the rating has a chance to show up on your electric bill. Gaps around the side panels, center channel, sill, or top sash can pull humid outdoor air into the room all day. That makes the unit run longer and can make an inverter model feel less impressive than expected.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsWhat the Best U-Shaped Window ACs Have in Common
We are less interested in brand hype than job-site performance. The best U-shaped window air conditioners share a few traits that matter in real homes.
Inverter compressor
For a bedroom, office, or frequently used living space, prioritize an inverter model. It should run quieter, hold temperature more evenly, and reduce the hard start-stop cycling that makes cheaper units annoying at night.
Rank #2
- ULTRA QUIET - The U-shape design of Midea U Smart Inverter AC uses your window to block noise outside. The highly-efficient inverter system warrants ultra-low noise and vibration, 9x quieter than traditional units with operation as low as 32 dBA.
- MORE THAN 37% ENERGY SAVINGS - With the advanced DC Inverter technology, Midea U window air conditioner achieves over 37% energy savings compared to other traditional units. It is the first window AC to obtain the ENERGY STAR Certification.
- SMART CONTROL - Midea U Smart Inverter air conditioner is Wi-Fi enabled and can be controlled from anywhere using the SmartHome app on iOS or Android. You can also use voice commands throughout your house, office, or apartment using Alexa or Google Assistant devices.
- FLEXIBLE WINDOW OPENING - The U-shaped design allows your window to open, bringing fresh air into your home and maintaining more of your view when the window air conditioner is installed. When the window is closed, the Anti-Theft Mechanism locks the window for added safety.
- ROBUST INSTALLATION - Install the included quick-snap bracket, set the air conditioner on the bracket, and secure the sidearms. Then you are all done and ready to enjoy. Available for single-hung or double-hung windows with width 22"-36", minimal height at 13.75".
ENERGY STAR certification and a strong CEER
Use the current ENERGY STAR room air conditioner database to confirm certification, CEER, and annual energy estimates before buying. Retail listings are useful, but the database is the better source for model-specific efficiency checks.
Correct BTU range
Common 2026 U-shaped options include 8,000, 10,000, and 12,000 BTU models. An 8,000 BTU model is often the right pick for a 250- to 350-square-foot bedroom or office. A 10,000 BTU model is better for roughly 350 to 450 square feet. A 12,000 BTU model belongs in a larger room around 450 to 550 square feet or a hotter top-floor room after checking electrical capacity.
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A proper bracket carries the load back to the sill and wall assembly. Do not prop a window AC with bricks, blocks, books, scrap wood, or a loose shelf. A bracket should be installed level or with the slight pitch specified by the manufacturer, fastened as required, and positioned so the unit’s weight is supported without twisting the sash.
Good controls without depending on them
Smart controls, schedules, apps, and voice features are convenient, but they should not drive the purchase. Cooling capacity, fit, bracket design, sealing, noise level, and electrical compatibility matter more. A unit with a polished app but poor fit in your window is the wrong unit.
2026 Cost Guide for U-Shaped Window ACs
For 2026, most mainstream 8,000 to 12,000 BTU U-shaped inverter units cost about $300 to $600 at major retailers. Higher-capacity models, heat-pump versions, premium smart units, and specialty saddle or U-style designs can run roughly $550 to $1,000 or more.
Professional installation labor usually runs about $130 to $300 for a straightforward window AC installation, often around two hours. National installed-cost ranges for a window AC commonly fall from about $139 to $519 for labor and standard setup, with average figures around $312. When unit price and labor are combined, total cost commonly ranges from $300 to $1,100, with national averages around $640.
| Item | Typical 2026 Cost | When It Applies |
|---|---|---|
| U-shaped AC unit, 8,000-12,000 BTU | $300-$600 | Most bedrooms, offices, and medium rooms |
| Premium U-shaped or saddle-style unit | $550-$1,000+ | Higher capacity, heat, specialty fit, premium controls |
| Professional labor | $130-$300 | Basic installation, typically around 2 hours |
| Unit plus labor | $300-$1,100 | Common total installed range |
| Old unit removal or disposal | $50-$200 | When replacing an existing AC |
| weatherstripping | $5-$10 | When factory foam is missing or inadequate |
| New outlet | $150-$350 | When no proper receptacle is nearby |
| Dedicated circuit | $250-$900 | Older homes, larger units, overloaded circuits |
| Window frame repair | $150-$600 | Soft wood, loose frame, damaged sill, poor sash operation |
| Glass replacement | $300-$650 | Cracked or damaged window glass |
The biggest price movers are BTU size, weight, upper-floor access, masonry or brick exteriors, limited sill depth, damaged wood/vinyl/aluminum frames, landlord or HOA rules, no-drill bracket requirements, electrical circuit capacity, permit fees where applicable, and local labor rates.
Window and Building Conditions to Check Before Buying
Measure before you choose a model. You need the clear opening width, clear opening height, sill depth, sash travel, interior stool projection, exterior trim condition, and any obstruction outside the window. Check whether the lower sash moves freely and locks firmly. If the sash does not close squarely into the U-channel, sealing and security suffer.
Inspect the sill and frame with the same mindset we use before installing exterior trim or flashing. Press on painted wood with a screwdriver handle. Look for softness, swelling, cracks, loose fasteners, separated joints, or signs of previous water intrusion. On vinyl and aluminum windows, check for flexing, loose tracks, broken balances, and distorted frames. A support bracket helps distribute load, but it cannot make a rotten sill or failed frame structurally sound.
Also look outside. Confirm clearance from shrubs, railings, security bars, awnings, storm windows, screens, walls, walkways, and neighboring property lines. The outdoor side needs airflow and a clear drainage path. If warm condenser air is trapped in a tight recess, the unit runs hotter and less efficiently.
Installation Details That Make or Break Performance
A U-shaped AC installation usually takes longer than a standard box unit because the bracket, sash, and seals all need to work together. For a simple first-floor install with a good window, a careful DIYer may spend 90 minutes to 3 hours. A pro crew can often do it in about 1 to 2 hours when the opening is ready and the electrical is straightforward.
Bracket and load path
Follow the manufacturer’s bracket instructions exactly. The bracket should sit solidly, be leveled as directed, and transfer weight into the sill and wall assembly without rocking. Many units need only a slight drainage pitch. Over-tilting can create alignment problems, stress the sash, and compromise the center seal.
Rank #3
- ULTRA QUIET - The U-shape design of Midea U Smart Inverter AC uses your window to block noise outside. The highly-efficient inverter system warrants ultra-low noise and vibration, 10x quieter than traditional units with operation as low as 32 dBA. Cooling Watts: 890W. Rated Cooling Amps (AHAM): 9.97. Control Type: Electronic. Refrigerant: R32.
- MORE THAN 35% ENERGY SAVINGS - With the advanced DC Inverter technology, Midea U achieves over 35% energy savings compared to other traditional units. It is the first window AC to obtain the ENERGY STAR Certification.
- SMART CONTROL - Midea U Smart Inverter AC is Wi-Fi enabled and can be controlled from anywhere using the SmartHome app on iOS or Android. You can also use voice commands throughout your house, office, or apartment using Alexa or Google Assistant devices.
- FLEXIBLE WINDOW OPENING - The U-shaped design allows your window to open, bringing fresh air into your home and maintaining more of your view when the unit is installed. When the window is closed, the Anti-Theft Mechanism locks the window for added safety.
- ROBUST INSTALLATION - Install the included quick-snap bracket, set the unit on the bracket, and secure the sidearms. Then you are all done and ready to enjoy. Available for single-hung or double-hung windows with width 22"-36", minimal height at 13.75".
Sash alignment
The lower sash should drop into the U-channel cleanly. If it binds, floats, or lands at an angle, stop and correct the bracket or window condition before forcing it. The sash is part of the air seal and security system.
Air sealing
Use the supplied foam, side panels, gasket material, and weatherstripping. Seal the center channel, side openings, top sash gap, and any daylight around the frame. Do not pack random loose material into gaps where it can absorb water, shift, or block drainage.
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Drainage
Room ACs remove moisture from indoor air. Some water evaporates off the condenser coil; some may drain outside. The unit should shed water away from the window assembly. Watch for staining, dripping against siding, water running back toward the sill, or condensation forming on interior surfaces.
Electrical Safety and Operating Cost
Most window AC units draw about 500 to 1,500 watts while operating. A small efficient 8,000 BTU inverter unit may be manageable on a properly wired room circuit. A larger 12,000 BTU unit can expose the weakness of an older shared circuit that also feeds computers, lamps, a TV, chargers, or other appliances.
Before purchase, check the nameplate amperage and plug type. Confirm the outlet is grounded and in good condition. Do not use an extension cord. Do not use a loose receptacle. Do not defeat a grounding pin. If the breaker trips, lights dim, the plug gets warm, or the receptacle is old and worn, bring in a licensed electrician.
A new outlet commonly costs $150 to $350. A dedicated circuit commonly costs $250 to $900 depending on panel location, wall access, wiring route, and local labor. That cost can change the decision. A $500 window unit is not really a $500 project if the room needs electrical work before it can run safely.
Permits, Rentals, HOAs, and Fire Escapes
Permit requirements vary by city, building type, and scope of work. Many simple plug-in window AC installations do not require a building permit, but local rules can still require secure mounting, proper brackets, restrictions on public-facing facades, or proof that the unit does not block required egress. Electrical work, new circuits, structural modifications, or through-wall alterations are more likely to trigger permit or licensed-trade requirements.
In multifamily buildings, rentals, condos, co-ops, historic districts, and street-facing installations, confirm the rules before opening the box. Some buildings require a specific bracket style, prohibit drilling, require installer insurance, restrict seasonal installation dates, or ban units over sidewalks unless installed by approved personnel.
Do not block a required egress window, fire escape access, balcony exit, or emergency path. If the only legal emergency opening in a bedroom is the same window you want to use for the AC, ask the local building department or a qualified contractor before proceeding. Cooling comfort is not worth compromising life safety.
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DIY can make sense when the unit is going into a first-floor double-hung window, the frame is solid, the outlet is properly grounded, the unit weight is manageable with two people, and the manufacturer’s bracket fits without modification. A careful homeowner with basic tools can usually handle measuring, bracket installation, sash alignment, foam sealing, and startup testing.
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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Hire a pro when the unit is above the first floor, the window is old or damaged, the sill is narrow, the exterior is brick or masonry, the building requires an insured installer, the AC is heavy, the bracket needs adaptation, or the electrical circuit is questionable. Also hire help if the installation affects a rental agreement, condo rule, fire escape, egress window, or public sidewalk.
On our projects, we also recommend professional help when the homeowner is buying a 10,000 or 12,000 BTU unit for an older home. The unit may be efficient, but the combination of weight, window stress, and circuit load deserves a closer look.
Rank #4
- Creates a Peaceful Home Environment – The innovative U-shaped design creates open window flexibility and helps block outside noise when closed, while Midea Inverter technology keeps sound levels as low as 32 dBA. That’s up to 9x quieter than traditional window ACs making it ideal for remote workers and families with young children.
- ENERGY-SAVING PERFORMANCE – This Energy Star certified AC unit delivers airflow you can feel up to 20 feet away and cools rooms up to 250 sq. ft. Midea’s Inverter technology automatically adjusts cooling based on room temperature, keeping your space comfortable with low temperature variance, providing up to 37% energy savings compared to other traditional window ACs.
- INTEGRATES WITH SMART HOME ECOSYSTEMS – Control your Midea air conditioner from your smartphone and your smartwatch using the Midea SmartHome app (currently the only AC brand app that supports smartwatch control). Works with Alexa and Google Assistant for voice control and is also compatible with Matter, making it easy to integrate with your smart home system. It also comes with a remote control.
- GET ONE BEFORE THEY’RE GONE – The only Midea U model available in Jet Black. This special edition adds a refined look that blends seamlessly into darker window frames and room decor and still allows your window to open for fresh air and won’t spoil the view. The dark side panels reduce ambient light versus the white version. Ideal for sleeping and movie nights.
- STRAIGHTFORWARD INSTALLATION PROCESS – The Midea U is easy to install. Everything you need to install the unit is included. The flat sill adapter and built-in gradienter ensure proper leveling, making setup fast and frustration-free. Unit fits single or double-hung windows 24" to 36" wide with a minimum opening height of 14.5". Also included is an Anti-Theft Mechanism window lock for added security.
U-Shaped AC vs. Other Cooling Options
A U-shaped window AC is not always the best answer. It sits between a low-cost standard window unit and a more permanent ductless mini-split. The right choice depends on ownership status, budget, noise tolerance, expected years of use, and how much you are willing to change the building envelope.
| Cooling Option | Best For | Typical Cost Position | Main Tradeoff |
|---|---|---|---|
| Standard window AC | Lowest upfront cost, occasional use | Lowest | Usually louder, more air leakage |
| U-shaped window AC | Quiet bedroom or office cooling | Moderate | More installation precision required |
| Portable AC | Windows that cannot hold a unit | Moderate | Less efficient, takes floor space |
| Through-wall AC | Permanent room cooling | Moderate to high | Requires wall sleeve and exterior opening |
| Ductless mini-split | Long-term high-efficiency zone cooling | Highest | Professional installation and higher upfront cost |
For a renter, a U-shaped unit may be the best balance if the lease allows it and no permanent modification is needed. For a homeowner planning to cool the same room for the next 10 years, a ductless mini-split may be worth pricing. For a rarely used guest room, a standard window unit may be adequate. For a casement window, a portable AC or specialty casement unit may be more realistic.
Common Mistakes to Avoid
The most common mistake is buying by BTU alone. Measure the actual window opening, sash travel, sill depth, exterior obstruction, and frame condition before ordering. A powerful unit that does not fit the opening is a return, not an upgrade.
Do not install into a weak, rotted, loose, or out-of-square frame. Do not skip the support bracket. Do not prop the unit with loose blocks, bricks, books, or scrap material. Do not over-tilt the unit. Do not leave gaps around the side panels or center channel. Do not plug the unit into an extension cord or overloaded circuit.
Another mistake is ignoring seasonal handling. Keep the bracket, hardware, foam pieces, manual, and model number together. If you remove the unit for winter, label the parts and store them with the AC. Seasonal reinstallations are faster and safer when the exact hardware is available.
Our Practical Buying Checklist
Before buying a U-shaped window AC, confirm these items:
- Room size in square feet, plus sun exposure, ceiling height, insulation, and occupancy.
- Window type, clear opening width, clear opening height, sash travel, and sill depth.
- Frame condition: no rot, loose sash, cracked glass, failed balances, or distorted tracks.
- Exterior clearance for airflow, drainage, and bracket support.
- Nearby grounded outlet with the correct voltage, amperage, and plug compatibility.
- ENERGY STAR certification, CEER rating, estimated annual kWh, and inverter operation.
- Included bracket type, installation requirements, and whether drilling is required.
- Lease, HOA, condo, historic district, or local rules that may affect installation.
If those checks pass, an 8,000 BTU inverter U-shaped unit is often the best starting point for a bedroom or office up to about 350 square feet. Move to 10,000 BTU for roughly 450 square feet, and 12,000 BTU for roughly 550 square feet or hotter rooms after confirming the circuit. Spend the time on bracket alignment and sealing. That is where the quiet, efficient promise of the U-shaped design becomes real in the house.
Frequently Asked Questions
Are U-shaped window air conditioners better than regular window AC units?
They can be better for bedrooms, offices, and frequently used rooms because the window sash drops into the center slot, helping separate indoor noise from the outdoor compressor. Many also use inverter compressors for quieter, steadier operation. They cost more and take more care to install than standard window units.
How much does a U-shaped window AC cost in 2026?
Most mainstream 8,000 to 12,000 BTU U-shaped inverter units cost about $300 to $600. Premium or specialty models can run $550 to $1,000 or more. With professional installation, total cost commonly ranges from $300 to $1,100 depending on labor, electrical needs, and window condition.
What size U-shaped window AC do I need?
An 8,000 BTU model commonly fits rooms up to about 350 square feet, 10,000 BTU fits roughly 450 square feet, and 12,000 BTU fits roughly 550 square feet. Step up for sunny exposure, top-floor heat, poor insulation, high ceilings, kitchens, or heavy occupancy.
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Yes, most should be installed with the manufacturer’s support bracket or an approved equivalent. The bracket controls the load path, stabilizes the unit, helps drainage, and reduces stress on the sash and sill. Loose props such as bricks, blocks, or scrap wood are not acceptable.
Can I install a U-shaped AC myself?
DIY is reasonable for a first-floor hung window with a solid frame, correct outlet, manageable unit weight, and a bracket that fits as designed. Hire a pro for upper-floor windows, damaged frames, masonry complications, heavy units, electrical concerns, rental or HOA rules, or any egress or fire-escape issue.
How much electricity does a U-shaped window air conditioner use?
Window ACs commonly draw about 500 to 1,500 watts depending on BTU size, CEER, fan speed, outdoor temperature, and runtime. Monthly operating cost often ranges from about $12 to $120. Inverter models with strong CEER ratings usually perform best in rooms where the unit runs many hours per day.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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