How to keep your NYC apartment cool: in-window, through-wall, split unit, and other types of air conditioners

Because a fan is no match for a NYC summer day when the temperature goes above 90 degrees.


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Summer is coming. Are you ready for it? (And by that we mean, is your air conditioning situation locked down?) If you’re all set, congrats, but if you’re looking to replace and/or upgrade your cooling technology, we can help.

Read on to find the best way to keep your NYC apartment cool—from in-window and through-the-wall ACs, to split units, PTAC, and portable units. (If you have money to burn, we even included a “luxury” option, employed in Italian museums.) We've also highlighted some of the highest-rated, best-selling units on Amazon, Home Depot, and Lowe's, so you can get shopping and start chilling. (Note that prices may have fluctuated since publication date.)

[Editor's Note: A previous version of this article ran in July 2018. It has been updated with new information for June 2019.]

1. Window units

A window AC is probably the most common option for NYC dwellers—the ubiquitous, dripping, noisy units that stick out of windows and create eyesores. Some people live in fear of having one of these units fall out of its window frame and land on them, which last happened (so far as we know) in 2014. Window brackets are a common solution to this minor threat; FYI, if you live in a regulated apartment, your landlord can't make you pay for that safety feature. 

Still, they’re great for controlled cooling and usually the most economical option, with costs starting at around $160 for a unit that claims to cool a 150-square-foot room. Before investing in one, you’ll first want to find out if your building allows them. Landmarked buildings, for instance, frown on using them on the facade (but some people do it anyway), and some older buildings prohibit them if the electrical system can't support it.

You’ll also need to determine the type of unit that is best for your needs. Start by measuring the room in which you will use it. Once you know the square footage of the space, you’ll have a better sense of how powerful a model you’ll need to buy (don’t forget to take ceiling height into consideration). Cooling capacities start at 5,000 BTU (British thermal units) per hour and can go up to 18,000 BTU per hour for the typical apartment-sized cooler.

These are 115-volt units that can plug into a 120-volt outlet, which is standard for household voltage. If you purchase a stronger 230-volt unit, you’ll need to make sure your outlets can handle the extra voltage—if not, you’ll need an electrician to upgrade your wiring. (Not an inexpensive process.)

According to Energy Star—the government program that provides certification to consumer products that meet certain standards of energy efficiency—you’ll also want to adjust for the following circumstances:

  • If the room is heavily shaded, reduce capacity to 10 percent.

  • If the room is very sunny, increase capacity by 10 percent.

  • If more than two people regularly occupy the room, add 600 BTU for each additional person.

  • If the unit is used in a kitchen, increase capacity by 4,000 BTU.

  • Consider where you install the unit. If you are mounting an air conditioner near the corner of a room, look for a unit that can send the airflow in the right direction.

Be sure to also look for models that have been Energy Star certified, so you don’t end up wasting money on a higher electric bill than necessary—these appliances are more efficient than required by government standards. And check the energy efficiency ratio, or EER (the BTU to the input in watts) of each model: It basically is a measure of how well the machine will operate when the temperature outside reaches 95 degrees or more. The higher the EER rating, the more efficient the AC.

Here are a few models to consider by cooling size:


Frigidaire FFRA0511R1–5,000 BTU$159 at Amazon

This unit is a top-selling model on Amazon, and claims to “quickly cool” a room of up to 150 square feet. Its EER is 11.1. It has a four-star rating with 2,720 customer reviews on Amazon.


GE AHS08LX–8,000 BTU$239 at Lowe's

This best-selling model for this size AC at Lowe’s earns 4.5 stars with 403 reviews. It cools rooms sized 250-350 square feet, and is Energy Star certified. It has a light that lets you know when your filter needs cleaning. Its EER is 12.1, and it comes with an “easy-mount” window installation kit.

FRIGIDAIRE FFRE0833U1$279 at Amazon

This compact 8,000 BTU unit cools a space up to 350 square feet, and has an energy efficiency ratio of 12.  The average review on Amazon is four stars.


2. Through-the-wall units

Similar to window ACs, these units are set into a hole cut into the exterior wall, usually beneath a window, and sit in a sleeve (metal or plastic) that holds them in place.

They function like window ACs in that they are designed to cool individual rooms, but that doesn’t mean you can go ahead and buy a window AC to place through your wall. According to Wirecutter, the New York Times company that tests and reviews consumer products, the vents on a typical window unit aren’t positioned to breathe properly in a standard wall sleeve, so it won’t work as well and will burn out its compressor sooner than it should. Also, unless your building already permits through-wall units, good luck trying to convince them to make an exception for you.

When looking for a through-the-wall AC, the same guidelines apply as window ACs for determining the kind that will be best for the space you need to cool. One exception: With window units, you need to measure the width of your window before making a purchase; wall units require you to also measure the dimensions of the sleeve in which the air conditioner will sit. Read here for more on through-the-wall units.

Here are some of the top-selling models:

LG LT0816CER, $432 at Amazon

This 8,000 BTU model is the top seller on Amazon (3.5 stars from 114 reviews), and is also recommended by Wirecutter, because it’s basically the wall version of LG’s window unit (model LW8016ER) which Wirecutter also recommends. It is somewhat quieter than its comparable competitors, and provides more flexibility, such as the fan’s directional controls, dehumidifier mode, and removable drain plug. Its EER is 10.7. 

Koldfront WTC12001W 12,000 BTU, $460 at Amazon

This 12,000 BTU model gets a four-and-a-half star review from 50 customers so far, and can also operate as a heater. It can cool a room up to 550 square feet, and has three fan speeds and four operation modes. The dehumidifier capacity is approximately 60 pints a day, and the EER is 9.5.

Keystone KSTAT12-1C, $559 at Home Depot

This 12,000 BTU, 115-volt model is a best seller for Home Depot, and has a four-star rating from 105 reviews. It can cool rooms up to 550 square feet and has a 10.5 EER. Money-saving features include an energy-saver mode, sleep mode, and programmable 24-hour timer. Its EER is 10.5. The manufacturer also claims the unit is quiet, with an output of 56.5 dBs on the lowest setting.

3. Ductless mini split-system ACs

You may see the phrase “split units in bedrooms” in rental apartment descriptions. What this means is that each room has its own ductless mini-split AC. These are popular in Europe and Asia and are catching on in the U.S. They’re often mounted high up on a wall so they’re less of an eyesore in a room, and are connected to an outdoor compressor. So if you want to install one in your co-op or condo, you will need to get board approval.

These are good options if you can’t install central air (more on that later). Hook-ups between the outdoor and indoor units generally require only a 3-inch hole through a wall for the conduit, and multiple units can be connected to a single compressor. They’re small, relatively quiet, and can be used for cooling (or heating) individual rooms. The number you’ll need depends on the number of rooms you want to cool. You’ll also need to have the unit(s) professionally installed.

Because these units heat as well as cool, they get a SEER rating, which differs from EER in that it is a seasonal energy efficiency ratio, and is determined by the cooling output during winter divided by its electric input during winter. As with an EER, the higher the rating, the more efficient the model will be. 

For more on the pros and cons of these systems, check out

Here are a few popular options:

DuctlessAire DA2421-H2, $1,559 at Amazon; $1,512 at Home Depot

This 24,000 BTU model gets an Energy Star SEER of up to 21, so it operates very efficiently. This unit claims it can cool rooms up to 1,200 square feet. It comes with a 220-volt cord. It has a five-star rating from 443 reviewers at Home Depot.

Pioneer WYS009AMFI17RL, $692 at Amazon

This model gets four-and-a-half stars on Amazon with 662 customer reviews. It has 9,000 BTU and comes with a 120-volt cord, so can be used in most standard NYC apartment plugs. Its SEER is up to 17.

4. Packaged terminal air conditioner (PTAC)

A PTAC sits independently along a wall, usually beneath a window, and often combines cooling and heating into one unit. (You’ll often find them in hotels.) They look similar to an enclosed radiator with vents at the top. They usually come with a 230-volt cord, so make sure your apartment is properly wired for it.

PTACs are typically installed when a building is constructed and are hooked up to its hot-water system. The hot water produced by the boiler flows into the PTAC and circulates the resulting heat into the apartment. There’s a separate chamber containing coolant that produces cool air. They are vented to the outside through a cutout below the window, usually covered with a metal grill, similar to a through-wall AC.

PTAC units are a little more expensive than through-wall units, but the cost to run them is about the same. Read here for more on the pros and cons of PTAC systems.

Here are two options. Note that units require a wall sleeve and grille, which are sold separately.

Amana 9,000 BTU R-410A, $900 at Home Depot

This 9,000 BTU model gets a five-star rating with 17 reviews at The Home Depot. Its EER is up to 11.7. The product overview mentions a redesigned construction with two fans for quiet operation.

Friedrich PDH15K5SG ($1,059 on Amazon)

At 14,500 BTU, this unit can easily cool most NYC apartment rooms. It doesn’t have a ton of reviews (four), but three of them are five-star. Its EER is up to 13.

5. Ambiance Air (price upon request)

If you love the chill of PTAC units but find the look of them unbearable (and have a lot of money to spend on keeping your place cool), you could invest in a concealed, in-wall PTAC. Made by an Italian company named Ambiance Air, these luxury units are available in a range of 15,000 to 23,000 BTU, have a heating function, high SEER, and can be remotely controlled through an app and wifi. The company also claims the machines are extremely quiet. Ambiance Air developed its technology in Italy, cooling the interiors of Venice museums; its units can be retrofitted to existing PTAC sleeves.

5. Portable ACs

These units should be used as a last resort if your building doesn’t let you use window units or any of the options above that require a through-wall installation. They aren’t as efficient as other types of units, meaning they don’t cool as well, they’re noisier, and they’re more expensive. Plus, they take up valuable floor space.

Should you have to go this route, Consumer Reports recommends that you install it correctly, get a fan to help move the air around, and block the sun from coming into the room where you’re using the unit.

Here are two options:

JHS A019-8KR/A, $285 at Amazon

This 8,000 BTU unit claims to cool up to 170 square feet of space, and has three functions: AC, fan, and dehumidifier. It gets a three-and-a-half-star rating from 199 reviews on Amazon.

LG LP1417WSRSM$449 at Amazon; $539 at Home Depot

This popular model at Home Depot has 14,000 BTU and claims to cool up to 500 square feet. It comes with two cooling and two fan speeds with an oscillating air vent, and works with SmartThinQ, Alexa and Google Assistant. It gets a four-star rating from 161 reviews.