Apartment Air Conditioner Buying Guide

Getting an air conditioner for an apartment can be a daunting task. This is especially true for property owners and landlords who need to outfit multiple apartment units with good AC units that are budget-friendly while being reliable at the same time. Approximately 80% of apartments in the US have air conditioning installed. As temperatures rise, even states with traditionally cold weather are getting air conditioners for apartments and homes.  

If you’re a property owner and considering installing apartment AC units, you’ve come to the right place for information. Read on to learn more about the different factors you should consider when shopping for apartment AC units, then explore the options that are available to you.

What to Consider for an Apartment AC

There’s no perfect one-size-fits-all solution when it comes to apartment AC units. Here’s what to consider when shopping for an apartment air conditioner:

1. Apartment Size

The cooling capacity of air conditioners is measured in British Thermal Units, or BTU. The higher the BTU, the more space it can cool.

As a general rule, it takes 20-30 BTUs to cool each square foot of space, but there are many factors that go into air conditioner sizing. This chart is a general reference, but the only true way to determine BTU need is to have a professional come out and do a calculation. 

You can use our handy Air Conditioner BTU Calculator tool to find out the capacity you need.

2. Energy Efficiency

Since air conditioners are long-term investments, it makes sense to get the most efficient unit you can. An AC’s energy efficiency can be measured in three ways:

Energy Star rating – this certifies the unit conforms to the latest energy efficiency standards set by the EPA and Department of Energy, and guarantees it is more efficient than non-certified units of the same class.

SEER rating – the Seasonal Energy Efficiency Ratio measures how efficient the AC is over a cooling season. The higher the SEER rating, the more efficient it is. You can find out more about the new SEER2 standards here.

HSPF rating – the Heating Seasonal Performance Function measures how efficient the AC works as a heat pump. The higher the number, the more efficient it is at heating. Not all units will have a heat pump.

3. Installation Requirements

Before purchasing an AC, check with your landlord or lease agreement to ensure the type you choose is permitted. Some apartments have restrictions on window units or through-the-wall installations.

4. Noise Levels

Apartments are high-density residential spaces, and apartment living means being mindful of noise levels. Check the decibel (dB) rating of an AC unit before buying:

• 50 dB or lower: Quiet operation (ideal for bedrooms)
• 50-60 dB: Moderate noise level (acceptable for living rooms)
• Above 60 dB: Louder operation, may be disruptive

Many units will not provide this rating.

5. Smart Features 

Modern air conditioners come with various features that enhance usability:

• Wi-Fi connectivity: Control the AC from your smartphone
• Programmable timer: Schedule cooling to save energy
• Sleep mode: Adjusts cooling for nighttime comfort
• Dehumidifier function: Removes excess moisture from the air

6. Refrigerant

In 2023, the Environmental Protection Agency started phasing out R-410a, a popular refrigerant used in many AC units. These will be replaced by A2L refrigerants that are more efficient and eco-friendly. As R-410a gets gradually phased out of the market, it will eventually become more expensive and harder to find.

When shopping for a new AC for your apartment, look for one that uses newer A2L refrigerants like R-32 to future-proof your unit. An air conditioner that uses the older R-410a cannot simply switch to new refrigerants.

You can learn more about R-32 air conditioners here.

7. Price

Of course, there’s also the price tag. Factors that affect the price include the type of AC unit (discussed below), the capacity, efficiency in the form of SEER and inverter tech, and extra features.

Typically, window air conditioners are the least expensive. Mini splits cost more, but are much more efficient over the long term and can service multiple rooms. PTAC and VTAC units are designed for heavy use and commercial-grade reliability.

Updating Existing Apartments

If your building already has apartment HVAC systems, it is easiest to replace what is there. Depending on the type of system you have, there are a variety of replacement options. If you have PTAC units, be sure to consult our PTAC replacement guide to learn how to choose the best replacement unit.

If you are not happy with the solution you have now, it may be time to look for something new.

Apartment Air Conditioner Choices

Here are the types of AC units available for apartments without central air conditioning.

1. Window Air Conditioners

Window ACs are among the most popular choices for apartment cooling. They are designed to fit in a window or a specially created wall opening, instead of requiring that you drill a hole in the wall.

However, window units are not aesthetic and can bring down the value of apartment complexes. They aren’t nearly as efficient as other apartment HVAC units and can be loud. Finally, they take up valuable window space — annoying if you have an urge to crack open a window to enjoy some fresh air.

Pros:

• Low price
• Easy to install and remove
• Effective cooling for small to medium-sized rooms

Cons:

• Blocks window space and natural light
• Requires proper support and installation
• May not be allowed in all apartment leases

Recommended Window AC for Apartments:

Entry level window AC

GE AHY08LZ 8000 BTU Smart Window Air Conditioner with Remote – 115 V – Energy Star 

This budget window AC packs a lot of features for the price! It has 8,000 BTUs of cooling capacity, good for 250 – 350 sq. ft. It has a 10.9 CEER and has convenient, easy to use features such as an electronic thermostat and a remote control. It comes with an EZ Mount window installation Kit that installs into a double hung window.

This unit includes built-in WiFi – to easily allow you to control your room’s comfort level from anywhere you have an internet connection. Voice Control capabilities include Amazon Alexa, Google Home and Google Assistant!

Premium window AC

Friedrich CCV12A10A 12000 BTU Chill Premier Inverter Smart Window Air Conditioner

Featuring 12,000 BTUs of cooling power, this upscale window unit boasts an inverter that allows it to achieve an impressive CEER of 15.0.

It uses the brand’s famous QuietMaster technology that utilizes heavy duty insulation on the inner wall for sound absorption as well as a stiffened sheet metal casing to help block external noise. Vibration reducing counterweights also help to reduce the sound. Additionally, the wide discharge vents optimize airflow and minimize front panel noise.

It boasts built-in Wi-Fi, as well as Amazon Alexa and Google Assistant support. The package includes a window installation kit with solid side flaps (vs accordion-style). Designed with the apartment user in mind, the SimpleSill Design allows the window to be opened and closed after the unit is installed.

2. Portable Air Conditioners

Portable air conditioners stand on the floor and vent hot air through a hose attached to a window. They are a good option if window ACs are not permitted in your apartment.

Pros:

• No permanent installation required
• Can be moved between rooms
• Easy to install with a window vent kit

Cons:

• Less energy-efficient compared to window ACs
• Takes up floor space
• Noisier than other apartment cooling options

Recommended Portable AC for Apartments:

Friedrich ZCP10SB 10,000 BTU ZoneAire Compact Portable Air Conditioner

This compact portable air conditioner provides three functions in one compact unit: air conditioning, dehumidification, and heat. It is perfect for smaller spaces up to about 450 sq. ft with its 10,000 BTU capacity, and can remove up to 60 pints of moisture per day.

This unit also includes built-in WiFi for on the go control through the ComfortPro app, as well as voice command compatibility with Amazon Alexis and Google Home. Other features include a 2 speed fan, auto restart after a power outage, and a washable anti-microbial air filter for easy maintenance and clean air. This unit also has a sleep control function that increases the temperature by 2° every 4 hours for comfort while you sleep.

The compact, portable air conditioner plugs into a standard 115-volt HH outlet with a 5.9 ft. long power cord. A gravity drain hose is also included for continuous draining while the unit is in dehumidifying mode.

3. PTAC

A packaged terminal air conditioner (PTAC) is a self-contained cooling and heating unit that houses all components in one casing. They are easy to install, user-friendly, and very ideal for apartments or condominiums. They also offer heat to provide year-round comfort — an added bonus for these inexpensive and practical air conditioning systems.

Keep in mind that a new installation of a PTAC requires that you make a large hole in the wall, which can be a drawback for some.

Pros:

• More efficient than window AC
• Better aesthetics
• Available in commercial-grade quality

Cons:

• More expensive than window ACs
• Requires clearance near the floor
• Requires drilling on an exterior wall

Recommended PTAC for Apartments:

GE AZVS15DCXWA 15000 BTU Class Zoneline PTAC Air Conditioner with Heat Pump

GE Zoneline PTACs are ahead of their competitors by introducing the use of R454B refrigerant, which complies with the EPA’s new refrigerant standards.

This model has 14,200 BTUs of cooling with a variable Heat Pump range between 4,000 – 14,000 BTUs. It includes built-in WiFi and Bluetooth Low Energy (BLE). BLE devices remain in sleep mode unless a connection is initiated.

Another shining feature is the addition of two DC fan motors, which reduce noise by dialing in the exact airflow needed for each heating and cooling function. With a sound transmission class of 29, GE’s Zoneline units are the quietest PTACs on the market at reducing outside noise when compared to leading competitors. A large cross-flow barrier optimizes airflow for a low, balanced sound that is hardly noticeable, while a heavy-duty, baked-on mastic barrier covers the back of the unit for superior sound insulation. A weather barrier system seal around the perimeter of the unit keeps all noise and dirt outside, ensuring a better and more comfortable environment while the PTAC is in use.

4. Through-the-Wall Air Conditioners

If you do not have the space for a PTAC unit or if you are looking for an apartment air conditioner with cooling only, a smaller through the wall unit might be the best choice. Through-the-wall air conditioners share many of the same advantages of PTAC units but in a smaller package. They are available in heat and cool and cooling only variants. Keep in mind, through-the-wall units are not manufactured to the same commercial grade quality standard as PTAC units.

Through-the-wall and PTAC units are available with stylish architectural grilles to provide a clean and consistent look on the outside of the building. They can even be special-ordered to match the color of the building’s exterior.

Pros:

• Doesn’t block window space
• More energy-efficient than portable ACs
• Provides powerful cooling for larger spaces

Cons:

• Requires a wall opening (may not be allowed in rented apartments)
• Permanent installation process
• More expensive upfront

Recommended Apartment Through-the-Wall AC:

GE AJCQ12AWJ 12000 BTU Through-the-Wall Room Air Conditioner

This 26″ thru-the-wall air conditioner features 12,000 BTU cooling capacity, 10.6 CEER, 10.6 EER, and is ENERGY STAR-certified. It offers a true built in look with only a minimal 5″ extension into the room with front. Competitor units require a 7.5 minimum extension into the room with front.

It is WiFi enabled with a built-in GE SmartHQ communication card built right in, and also includes a full function remote. It features 3 fan speeds and 6-way directional air-flow. The electronic controls and auto dimming display offers a smooth touch control panel with large LCD display with centered controls and auto-dimming.

5. Mini Splits

Mini split air conditioners can be a great option in buildings where central air is not. Requiring only a three-inch hole to run through the line set, installing a mini split requires much less construction than a central air system. Mini splits can raise the value of the property, as they are a luxury product compared to window units or through-the-wall. Super quiet and very energy efficient, mini splits provide a premium heating and cooling experience and make great apartment AC units.

Pros:

• Highly energy-efficient
• Quiet operation
• No need for window space

Cons:

• Expensive to install
• Requires professional installation
• May not be allowed in rental units without landlord approval

Recommended Mini Splits for Apartments:

Single zone Mini Split

Friedrich FPHW123A 12000 BTU Floating Air Pro Series Single Zone Mini Split with Built-In WiFi – Heat and Cool – Energy Star

This single zone mini split system includes both the FPHFW12A3B wall unit and the FPHSR12A3A outdoor compressor. It is capable of 12,000 BTU of cooling and 13,000 BTU of heat (7,500 BTUs at 17°F but with its low ambient heating capacity, will provide heat even with temperatures down to 5°F.) It features high efficiency ratings including a 22.0 SEER and 13.0 EER, and can service up to 600 sq. ft.

One of the newest features of the Floating Air Pro Series is the FastPro Technology. FastPro Technology makes installation and maintenance a much easier, less time consuming task. FastPro gives your HVAC technician easy access to the entire indoor unit, including piping, wire terminal, the fan and fan components. The front panel of your wall unit can be propped open with sliding bolts to keep the cover up and out of the way. If more room is needed to work, there is a slide bar that can be pushed out for a wider space. This makes installation of the refrigerant lines and wiring a much more manageable, less time consuming task for your HVAC technician.

It comes with built-in WiFi and access to FriedrichGo App for wireless control as well as Google Assistant and Alexa voice commands.

Multi-zone Mini Split

Daikin 4MXM36AVJU9 36000 BTU Configurable Quad Zone Heat & Cool Split System

The Daikin MXM Series of outdoor compressors offer a heating operation range from 5°F up to 60°F and a cooling range from 14°F to 115°F.\

This model achieves energy efficiency levels of up to 20.0 SEER2, up to 10.0 EER2, and up to 9.5 HSPF2. It is rated for 36,000 BTUs and has a maximum connected BTU rating of 48,000 BTUs. It uses R32 refrigerant, one of the refrigerants that meets the new industry standards.

The drain pan on these units offers excellent drainage to reduce ice build-up in extreme conditions. It is also compatible with the Daikin Cloud WiFi Adaptor for complete comfort control from anywhere with your tablet or smart phone!

Tips to Maximize your Apartment AC

1. Improve Air Circulation

Use a ceiling or oscillating fan to distribute cool air evenly.

Keep interior doors open to allow airflow between rooms.

2. Block Heat Sources

Close curtains or blinds during peak sunlight hours.

Use reflective window films to reduce heat gain.

3. Seal Air Leaks

Check for gaps around windows and doors and seal them with weather stripping.

Ensure the AC unit is properly installed with no air leaks.

4. Maintain Your AC Regularly

Clean or replace filters every month for optimal performance.

Remove dust and debris from air vents and coils.

Ensure proper drainage to prevent water buildup.

Have a Cool Apartment with Us!

Choosing the right air conditioner for your apartment depends on factors like room size, energy efficiency, noise levels, and installation restrictions. Whether you opt for a window unit, a portable AC, or a ductless mini-split, proper maintenance and smart cooling strategies will ensure a comfortable indoor environment all summer long.

For high-quality apartment air conditioners, check out the selection at TotalHomeSupply.com!