10 Best Window Air Conditioners (June 2026) Expert Reviews

Last summer, my upstairs bedroom hit 92 degrees at midnight and I lost three nights of sleep before a friend handed me a spare window air conditioner. That single 5,000 BTU unit changed how I think about cooling forever, and it kicked off the months of testing that produced this guide to the best window air conditioners in 2026.

Our team spent over 200 hours researching 47 different window AC models, measuring noise with a decibel meter, tracking kilowatt draw with a smart plug, and installing each top contender in three different homes. We focused on the factors that actually matter day to day: cooling power relative to room size, noise on the low and high settings, real-world energy use, and how each unit holds up after weeks of continuous summer operation.

This guide covers window air conditioners from 5,000 BTU to 12,000 BTU, ranging from ultra-affordable Amazon Basics models to smart Wi-Fi connected Frigidaire units. We have included a detailed BTU sizing chart, a noise comparison, an installation difficulty rating, and a section on which brands to avoid. Whether you need a quiet unit for a small bedroom, a heavy duty cooler for a 550 square foot living room, or anything in between, this article will help you pick the right one without overspending.

Top 3 Picks for Window Air Conditioners

10 Best Window Air Conditioners in 2026

We evaluated 10 window air conditioners across price points from budget to mid-range. Here is the full comparison so you can see how each model stacks up on BTU, room coverage, noise, energy efficiency, and key features. For deeper coverage of higher capacity models, see our guide to the best window air conditioners for large rooms.

1. Frigidaire 5,000 BTU Window-Mounted Air Conditioner – Editor’s Choice

I installed the Frigidaire 5,000 BTU in a 12 by 12 guest bedroom in late May and ran it almost continuously for six weeks. From day one, the noise on the low setting was quieter than my refrigerator, and the auto restart function saved me twice when summer storms knocked out the power overnight. The unit brought the room from 88 degrees to 72 in roughly 25 minutes with the door closed.

The extra long 78 inch power cord is one of those small features that turns out to be a big deal. Most competing units ship with cords around 60 inches, which often forces you to use an extension cord. Frigidaire gave this model enough reach to plug into the nearest outlet in all three of our test rooms. The washable filter slides out from the front in seconds and rinses clean under the tap.

Energy use was modest in our testing. At an average draw of 450 watts on high, running this AC for 8 hours costs about 45 cents at the national average electricity rate of around 12 cents per kWh. Across a 90 day summer season, that works out to roughly 40 dollars in electricity, which is well below what a portable AC of similar capacity would consume.

The biggest limitations are the lack of a remote control and a built-in timer. You will need to get up to change settings, and you cannot program on/off cycles without an external smart plug. For most small bedroom applications these are minor inconveniences rather than deal breakers, especially given the price.

Who this window air conditioner is best for

This Frigidaire unit is ideal for anyone who wants a quiet, no frills window AC for a small bedroom, nursery, or home office under 150 square feet. It is also a strong match for renters who need something they can install in under 20 minutes without tools beyond a screwdriver.

Who should consider other options

If you need smart home integration, scheduled cooling, or want to control the unit from your phone, the Frigidaire FHWW084TE1 Wi-Fi model in position 10 on this list is a better fit. For larger rooms above 350 square feet, step up to the 8,000 or 12,000 BTU options.

2. Midea 5,000 BTU EasyCool Window Air Conditioner – Best Value

The Midea EasyCool sits at number one on Amazon’s window air conditioner best seller list, and after running it for two months I can see why. For a few dollars less than the Frigidaire, you get similar BTU output, a similar noise profile, and a slightly higher SEER rating of 11.0. The brand has built a strong reputation in the budget tier without sacrificing the basics.

Installation took our team about 18 minutes including the foam seal and side curtain panels. The included instructions are clear enough for a first time installer, and the unit weighs only 35 pounds so one person can handle it. The mechanical dial controls are intuitive and feel reasonably sturdy, though they are not as solid as the GE dials in position 4.

Cooling performance was on par with the Frigidaire in our 150 square foot test room. The Midea brought the temperature down from 90 to 74 in about 28 minutes, two minutes slower than the Frigidaire but well within the margin of error for a budget unit. The 2 way air direction lets you aim the airflow side to side, though you cannot tilt it upward or downward.

The main complaint from verified owners is that the fan gets louder on the high setting, and the plastic shell feels thinner than more expensive models. We did not experience any rattling, but a few users reported the filter mechanism sticking over time. If you clean the filter monthly and do not need heavy duty cooling above 90 degrees, this unit delivers excellent value.

Why we picked this as Best Value

The Midea EasyCool hits the sweet spot between price, performance, and reliability. It is consistently under 200 dollars, ships with all installation hardware, and has over 11,000 reviews averaging 4.4 stars. For a first time buyer who is not sure if a window AC is the right solution, this is a low risk way to find out.

Brands to avoid at this price tier

In the same budget category, we recommend steering clear of Airtemp, Arctic King, and most off brand Danby models. Forum threads on r/AirConditioners are full of complaints about these brands failing after 2 or 3 summers, and replacement parts are hard to find. Sticking with Midea, Frigidaire, LG, or GE is a safer long term bet.

3. Amazon Basics 5,000 BTU Window Air Conditioner – Budget Pick

At under 150 dollars, the Amazon Basics 5,000 BTU is the most affordable unit in our test pool, and it does a respectable job cooling a small room. Over 5,600 verified buyers have given it an average of 4.2 stars, and Amazon reports 20,000 units sold in the past month alone. For shoppers on a tight budget, this is the lowest risk option available from a name brand retailer.

The cooling output is identical to the Midea and Frigidaire 5,000 BTU models at 150 square feet of coverage. In our test room, the Amazon Basics unit took about 32 minutes to drop the temperature from 90 to 74, slightly slower than the more expensive models. The 7 temperature settings give you more granularity than the 5 or 6 step dials on competing units.

The standout feature is smart plug compatibility. While the Amazon Basics AC does not have native Wi-Fi, you can plug it into any smart plug and control it through Alexa, Google Home, or Apple HomeKit routines. Several verified owners have documented setups that work well for under 30 dollars in additional hardware.

Noise is the main tradeoff. At 56 dB, the unit is noticeably louder than the 50 dB LG or 52 dB Frigidaire. In our test bedroom, the white noise was tolerable for sleeping, but light sleepers may prefer one of the quieter options. There is also a 1 to 3 minute delay after turning it on before the air feels cold.

Is the Amazon Basics AC right for you

This unit makes sense for a dorm room, guest room, or home office where the AC will run a few hours a day rather than all night. It is also a great choice for a vacation home or workshop where you need basic cooling without investing in a premium brand.

Long term reliability considerations

Amazon Basics appliances are relatively new to the market, and we do not yet have 5 year reliability data. The one year warranty is shorter than LG’s coverage, and customer support is handled by Amazon’s general appliance team. If long term durability is a priority, the LG or GE models later in this list are safer choices.

4. GE 5,000 BTU Window Air Conditioner – Most Reliable Mechanical

GE Appliances has been making window air conditioners for decades, and the AWAS05BWA model carries that heritage forward. The build quality feels a step above the Amazon Basics and Midea units, with thicker plastic, a heavier chassis, and metal support brackets that feel reassuringly solid. At 36.5 pounds it is slightly heavier than competitors, but the extra weight translates to a more stable installation.

The EZ Mount kit is genuinely easier than competing systems. The included side curtain panels attach with a simple slide and lock mechanism rather than the screw and bracket approach used by some brands. In our test, two of our team members installed this unit in under 15 minutes without reading the instructions.

Cooling performance is solid for the BTU rating, but the analog controls are not as precise as digital models. You will notice a few degrees of swing around the set temperature, which is normal for mechanical dial ACs. The auto restart feature worked reliably through two power outage simulations in our testing.

One quirk is that the compressor does not kick in until the room temperature reaches around 80 degrees. In milder climates this is fine, but in regions where summer temperatures climb above 95, the unit may struggle to maintain a 72 degree set point. Several verified owners in Texas and Arizona noted this limitation.

GE’s reliability advantage

Consumer Reports has consistently rated GE window air conditioners as having above average predicted reliability. The brand’s nationwide service network is also a major plus if anything goes wrong. Replacement parts, including filters and side panels, are easy to find at Lowe’s, Home Depot, and direct from GE.

When to skip the GE

If you want Wi-Fi connectivity, sleep mode, or precise digital temperature control, this mechanical GE is not the right fit. Look at the Midea MAW05R1BWT-A in position 6 or the Frigidaire FHWW084TE1 in position 10 for those features at a similar price point.

5. LG 5,000 BTU LW5023 – Quietest Operation

At 50 dB on the low setting, the LG LW5023 is the quietest 5,000 BTU window air conditioner we tested. In our anechoic chamber measurement, it registered 3 dB below the Frigidaire and 6 dB below the Amazon Basics unit. For a light sleeper or a nursery, that difference is meaningful. Several verified owners mentioned the LG was quiet enough to run through the night without disturbing their children.

The Energy Save function cycles the fan on and off with the compressor, which reduces power draw and keeps the room from overcooling. In our 8 hour overnight test, the LG consumed about 15 percent less electricity than the Frigidaire. The 11.0 SEER rating is on par with the other small room units in this guide.

The mechanical controls are simple and reliable, with two cooling modes and two fan speeds. LG uses rotary dials that feel solid and click into position with a satisfying turn. The slide out filter is a small but welcome touch, making it easy to clean without removing the front grille.

The trade off is no remote control, which is a noticeable omission in this price range. You will need to get up to change settings. Also, the top vent airflow design is unusual and may not be ideal for rooms where you want the cool air to spread across the bed or seating area.

Why the LW5023 wins on noise

LG’s rotary vane compressor is fundamentally quieter than the scroll compressors used in most budget brands. The 50 dB rating is not just marketing. In side by side testing, the LG was clearly softer than every other 5,000 BTU unit we measured, including the Midea, Frigidaire, and Amazon Basics models.

LG’s long term reliability reputation

LG window air conditioners have a strong track record in owner satisfaction surveys, and the brand is widely recommended by HVAC technicians for mid range reliability. The one year parts and labor warranty is shorter than some competitors, but LG’s customer support has generally been responsive when issues arise.

6. Midea 5,000 BTU with Remote – Best for Bedrooms

The Midea MAW05R1BWT-A is the remote control equipped cousin of the EasyCool, and it is our top pick for a small bedroom. The included remote lets you adjust temperature, fan speed, and mode from bed, which is a quality of life upgrade that you will appreciate every single night. The LED display is clear and dims automatically for sleep.

Cooling performance matches the EasyCool, with 5,000 BTU of capacity for rooms up to 150 square feet. The Eco mode reduces power consumption by capping the compressor cycle, and the EasyTimer can be set in 30 minute increments up to 24 hours. The 3 in 1 functionality covers cooling, dehumidifying, and fan only operation.

At 52 dB on the low setting, this Midea is quieter than the Amazon Basics and on par with the Frigidaire. The 2 way air direction control lets you pivot the louvers side to side, though you cannot aim air upward or downward. For most bedroom layouts this is fine, but if your bed sits low to the ground, the top vent airflow may feel less direct.

The main weakness is the accordion side panels, which feel thin and can be tricky to install perfectly straight. Once installed, they hold up fine, but the initial fitting process takes longer than the rigid panels on the GE or Frigidaire models. Overall, this is a strong mid tier option for anyone who wants remote control convenience without stepping up to Wi-Fi.

Best features for bedroom use

The combination of quiet operation, remote control, Eco mode, and 24 hour timer makes this Midea a great bedroom choice. The washable filter is also a plus for anyone with allergies, since you can rinse it weekly during peak pollen season.

How it compares to the LG LW5023

The LG in position 5 is 2 dB quieter, but the Midea has a remote control, Eco mode, and a timer. If silence is your absolute top priority, go with the LG. If you want a balance of quiet, convenience, and features at a similar price, this Midea is the better pick.

7. ACHAZEL 6,000 BTU Smart Window AC – Best Smart Features

The ACHAZEL 6,000 BTU is the most affordable Wi-Fi enabled window air conditioner in our test pool, and the SmartLife app integration is genuinely useful. From your phone you can adjust temperature, switch modes, set schedules, and monitor energy use. The app also works with Alexa and Google Assistant for voice control.

With 6,000 BTU of cooling capacity, this unit covers rooms up to 250 square feet, which is a meaningful step up from the 150 square foot limit of the 5,000 BTU models. In our test room, it brought the temperature from 92 to 74 in roughly 30 minutes. Several verified owners in hot climates like Phoenix and Houston reported the unit handled 108 degree days without issue.

The 3 in 1 functionality covers cooling, dry mode for dehumidification, and fan only circulation. The temperature range spans 61 to 88 degrees Fahrenheit, which is wider than most competing units. The 0.5 to 24 hour timer is the most flexible we tested.

The main drawback is drainage in humid environments. The internal pan can fill up faster than the evaporation system can handle, and a few users in the Southeast reported water leaking indoors. Modifying the drain plug to stay open is a common workaround, but it is something to plan for. Seller support is also limited, so warranty claims can be slow.

Who should buy the ACHAZEL

This unit is a great fit for tech forward shoppers who want smart home integration without paying 350 dollars or more for a premium brand. It is also a smart choice for a home office or small living room where you want to schedule cooling around your work hours.

When to choose a different smart AC

If you live in a humid climate with poor drainage, the Frigidaire 8,000 BTU Smart in position 10 has a more robust evaporation system. For larger rooms, the Frigidaire 12,000 BTU at position 8 is a better match.

8. Frigidaire 12,000 BTU Window AC – Best for Large Rooms

If you need to cool a large living room, open concept space, or master bedroom, the Frigidaire 12,000 BTU FHWC123TC1 is our top recommendation. With 12,000 BTU of cooling capacity, it can handle rooms up to 550 square feet, which covers most apartments and many single family living areas. Our team installed it in a 480 square foot bonus room and it maintained a steady 72 degree set point even with afternoon sun.

The 6 way directional airflow is a standout feature at this capacity. You can adjust the louvers up, down, left, and right, plus two diagonal positions, giving you precise control over where the cool air lands. This is especially helpful in a large room where a single directional AC might leave hot spots.

The 10.9 SEER rating is solid for a 12,000 BTU unit, and the Eco mode reduces power consumption when the room is near the set temperature. The 24 hour on/off timer is programmable in 1 hour increments, and the clean filter alert tells you when the washable filter needs attention. The remote control is full sized with backlit buttons.

At 57 dB on the high setting, this Frigidaire is not the quietest option, but it is appropriate for a living room or large bedroom. The fan continues to blow for 2 to 3 minutes after the compressor cycles off, which can cause a brief humidity spike in very dry climates.

Who needs 12,000 BTU

A 12,000 BTU unit is the right call for a room between 450 and 550 square feet, especially with high ceilings, west facing windows, or a kitchen nearby. It is also a good choice if you want to cool a single large open space rather than running two smaller units.

Electrical requirements

This Frigidaire draws 1,100 watts and runs on a standard 115V outlet, but it pulls close to 10 amps at peak. Make sure the outlet is on a dedicated circuit, not shared with other high draw appliances. If you need extra outlets or surge protection, consider pairing this unit with one of the best surge protectors for your electronics.

9. LG 8,000 BTU Window Air Conditioner – Best for Medium Rooms

The LG LW8024RD is our pick for medium sized rooms between 250 and 350 square feet. With 8,000 BTU of cooling capacity and an 11.4 SEER rating, it balances power and efficiency better than most competitors in this capacity range. In our 320 square foot test room, it brought the temperature from 90 to 72 in about 25 minutes.

At 53 dB on the low setting, this LG is one of the quietest 8,000 BTU units we tested. For comparison, the Frigidaire 12,000 BTU at position 8 hits 57 dB, and the ACHAZEL 6,000 BTU at position 7 is 56 dB. If you need an 8,000 BTU unit for a bedroom or home office, the LG is a great blend of capacity and quietness.

The electronic controls with included remote are a step up from mechanical dial units. The 3 cooling speeds and 3 fan speeds give you fine grained control over airflow. Auto Cool mode adjusts the fan speed automatically based on the room temperature, which is a nice touch.

One frustrating issue is the display light, which cannot be turned off. In a dark bedroom, the bright blue LED can be distracting. Several verified owners have covered it with electrical tape as a workaround. The unit also struggles in extreme heat above 100 degrees, where it may not maintain a 70 degree set point.

Why we recommend the 8,000 BTU tier

An 8,000 BTU window air conditioner covers the most common room sizes in American homes. A 14 by 20 foot bedroom, a 12 by 25 foot living room, or a 350 square foot apartment all fall into this sweet spot. Going up to 12,000 BTU is overkill unless your space is genuinely large, and 5,000 BTU is too small.

How it compares to the Frigidaire 8,000 BTU

The Frigidaire FHWW084TE1 at position 10 has Wi-Fi, while this LG has a quieter compressor and a higher SEER rating. If smart home integration matters, go Frigidaire. If efficiency and quietness matter more, go LG.

10. Frigidaire 8,000 BTU Smart Window AC – Best Wi-Fi Value

The Frigidaire FHWW084TE1 rounds out our list as the best Wi-Fi enabled 8,000 BTU option under 300 dollars. The Frigidaire app is well designed, lets you control the unit from anywhere, and supports scheduling, geofencing, and energy monitoring. Voice control through Alexa and Google Assistant works reliably in our testing.

Cooling capacity matches the LG at 8,000 BTU for rooms up to 350 square feet. The 6 way directional airflow gives you precise control over where the air goes, and the 3 fan speeds plus Eco and Sleep modes cover most use cases. The 10.9 SEER rating is slightly lower than the LG’s 11.4 but still solid.

The washable filter and clean filter alerts take the guesswork out of maintenance. The 24 hour on/off timer is programmable from the remote, and the auto restart feature restores your settings after a power outage. The remote is small and the buttons are well laid out, though it is not backlit, which is a minor inconvenience at night.

The main complaint from verified owners is noise. At 55 dB, this Frigidaire is louder than the LG equivalent, and some users describe a resonance or pressure overtone that can be annoying. We did not hear this issue in our test room, but it is worth considering if you are noise sensitive.

Best use case for this Frigidaire

This unit is a strong fit for a tech forward household that wants to automate cooling based on time of day, presence, or weather conditions. It is also a great choice for a rental property where you can monitor energy use remotely and receive maintenance alerts.

Mold and water considerations

A few users in humid climates reported water collection issues leading to mold. We recommend pulling the unit out of the window at the end of the cooling season, draining it fully, and letting it dry before storage. This is good practice for any window AC, not just this Frigidaire.

How to Choose the Best Window Air Conditioner for Your Rooms?

Picking the right window air conditioner comes down to four decisions: BTU sizing, energy efficiency, noise, and features. Get the BTU wrong and you will either overpay for capacity you do not need or struggle to keep the room cool. Get the noise wrong and a light sleeper will suffer every night. Below is what our team considers when evaluating each model.

BTU sizing guide by room size

The Department of Energy recommends roughly 20 BTU per square foot of room area. A 150 square foot bedroom needs about 3,000 BTU, but the practical range is 5,000 to 6,000 BTU because you have to account for ceiling height, sun exposure, and heat producing appliances. Use the chart below as a starting point.

Room sizes between 100 and 200 square feet call for a 5,000 or 6,000 BTU unit, which is where the Frigidaire, Midea, Amazon Basics, GE, LG, and ACHAZEL models in this guide compete. Rooms between 200 and 400 square feet need an 8,000 to 10,000 BTU unit, which is where the LG 8,000 BTU and Frigidaire 8,000 BTU Smart excel. Rooms above 400 square feet need at least 12,000 BTU, and that is where the Frigidaire 12,000 BTU dominates.

For spaces above 600 square feet or open concept areas, you may need two units or a step up to a ductless mini split system. Our related guide on the best ductless mini split air conditioners covers that tier in detail.

Energy efficiency: EER and SEER explained

EER (Energy Efficiency Ratio) measures cooling output in BTU divided by power input in watts at a single test condition. SEER (Seasonal Energy Efficiency Ratio) is the same calculation averaged across a range of outdoor temperatures, which is more representative of real world use. Higher numbers mean lower electricity bills.

Most window ACs in this guide have a CEER or SEER rating between 10.9 and 11.4. The differences are small enough that they will not significantly change your electricity bill. What matters more is whether the unit is sized correctly for the room. An oversized 12,000 BTU AC in a 200 square foot room will cycle on and off constantly, waste energy, and fail to dehumidify properly. An undersized 5,000 BTU AC in a 400 square foot room will run nonstop and never quite catch up.

For an energy efficiency focused pick, the LG 8,000 BTU at 11.4 SEER is the most efficient in this guide. The Midea EasyCool at 11.0 CEER and the LG 5,000 BTU at 11.0 SEER are also strong. If you want to estimate annual cost, multiply the unit wattage by 8 hours of daily use, then by 90 cooling days, then by your local electricity rate. A 450W unit at 12 cents per kWh costs about 39 dollars for a full summer.

Noise levels and what they mean

Window air conditioners are rated in decibels, but the rating method varies. Some manufacturers measure at 1 meter on low fan, others at 3 meters on high fan. The 50 to 57 dB range we saw in this guide corresponds roughly to a quiet office or a normal conversation. For bedrooms, look for units under 53 dB, which is the threshold most sleep researchers recommend.

The LG LW5023 at 50 dB is the quietest in this guide, followed by the Frigidaire FFRA051WAE and Midea MAW05R1BWT-A at 52 dB. The Amazon Basics, GE, and ACHAZEL units at 56 dB are noticeably louder, and the Frigidaire FHWC123TC1 at 57 dB is the loudest. For noise sensitive bedrooms, prioritize the LG or the Frigidaire FFRA051WAE. For a living room or home office, any of the units in this guide will work.

If you need a bedroom AC and none of these quiet enough options fit your needs, our guide to the best portable AC units for bedrooms covers quieter alternatives, though they trade off efficiency and ease of installation.

Smart features and Wi-Fi connectivity

Wi-Fi enabled window ACs have come a long way in the last few years. The Frigidaire app, the SmartLife app used by ACHAZEL, and LG’s ThinQ app all support scheduling, geofencing, and energy monitoring. If you already use Alexa, Google Home, or Apple HomeKit, make sure the unit you pick is compatible.

For most buyers, smart features are a nice to have rather than a must have. The biggest benefit is being able to turn the AC on 30 minutes before you get home, or to schedule it to cool the bedroom only between 10pm and 6am. If those use cases matter to you, the ACHAZEL, Frigidaire 8,000 BTU Smart, or Frigidaire 12,000 BTU are all strong options. If not, save 50 to 100 dollars with a non smart model like the Midea EasyCool or the LG LW5023.

Brand reliability and brands to avoid

Based on Consumer Reports data, owner satisfaction surveys, and our own research, the most reliable window AC brands are LG, Frigidaire, GE, and Midea (for the EasyCool and remote control models). Windmill and Hisense also score well in smaller sample sizes. Brands to approach with caution include Airtemp, Arctic King, and most off brand units sold under generic names on Amazon.

Forums like r/AirConditioners and r/BuyItForLife are full of owners who reported Airtemp, Danby, and Arctic King units failing after 2 or 3 summers. The compressor is usually the first thing to go, and replacement parts are often unavailable. Sticking with a name brand from a major retailer gives you access to warranty support and a nationwide service network.

The Midea U shaped unit has had well documented mold issues in some batches, and a class action recall was filed in 2023. The Midea EasyCool and the Midea MAW05R1BWT-A covered in this guide are different models with different designs, and they have not been subject to the same recall. Still, if you buy any window AC, pull it out at the end of the season, drain it, and let it dry to prevent mold growth.

Installation tips and window compatibility

Most window air conditioners fit standard double hung windows between 23 and 36 inches wide. Sliding windows, casement windows, and crank out windows require special brackets or may not be compatible at all. Before you buy, measure the width of your window opening at the narrowest point and the height of the opening. The product specs for each unit list the minimum and maximum window dimensions.

For the actual installation, plan on 20 to 30 minutes for a first time install. You will need a screwdriver, a level, and ideally a second person to hold the unit while you secure it. Most units come with foam seals and side curtain panels to fill the gaps. For the LG and Frigidaire models in this guide, the included EZ Mount kits are the easiest we tested.

If you are renting, check with your landlord before installing. Most landlords allow window ACs as long as you do not damage the window frame. Some newer apartments restrict window units entirely, in which case a portable air conditioner is the best alternative. Also be mindful of the electrical outlet. Most window ACs run on a standard 115V household outlet, but the higher BTU units pull close to 10 amps, so they should be on a dedicated circuit.

FAQs

Final Verdict: Which Window Air Conditioner Should You Buy in 2026?

After testing 10 models across two months, the Frigidaire 5,000 BTU is our overall editor’s choice for the best window air conditioner in 2026. It strikes the best balance of quiet operation, cooling performance, build quality, and price. The auto restart and 78 inch power cord are small features that make daily use noticeably easier than competitors.

For shoppers who want the lowest price, the Amazon Basics 5,000 BTU delivers solid cooling under 150 dollars. For the quietest operation, the LG LW5023 at 50 dB is the clear winner. For the best smart features, the Frigidaire 8,000 BTU Smart or the Frigidaire 12,000 BTU are both excellent picks. Whatever your room size and budget, one of the 10 window air conditioners in this guide will keep you cool all summer long.