The Best Air Conditioners for 2024: Buying Guide

Updated August 2, 2024.

It’s that time of year again – flowers are in bloom, birds are chirping and the temperature is on the rise. Summer’s right around the corner and it may be time for you to start thinking about how you’ll cool your home during the upcoming hot, sunny months.

With so many different options to choose from, it can be daunting to find the best air conditioner for your needs. To help you out, we’ve put together this comprehensive AC buying guide to help you identify what to look for. 

Take a look at some of our top picks, then head on over to our website to shop and get free shipping on your order!

Air Conditioner Type	Top Product
Window AC	Friedrich CCW12B10B
Through-the-Wall AC	GE AJCQ12DWJ
Single-zone Mini Split	Friedrich FPHW121A
Multi-zone Mini Split AC	Daikin 4MXS36WMVJU9
PTAC	Friedrich PVH12K3FC
VTAC	GE AZ9VH12DAC
Portable AC (Residential)	Friedrich ZCP10SA
Portable AC (Commercial)	Kwikool KIB2421

More details on the best AC units for 2024 below.

Types of AC Units

When shopping for a new air conditioner, you should first have a good idea of what type of AC unit you need. Are you looking to cool your entire house? Just a room? Knowing how large of a space you need to cool will help you narrow down your options and find an AC unit that delivers the right amount of cooling power for you.

In general:

• Window air conditioners are best for cooling individual rooms and small spaces, like an apartment or dorm.
• Through-the-wall ACs are similar to window units, but do not rely on windows for installation. These are great if you want to cool a room that has no windows, or if you want to retain the ability to open your window as you please.
• PTAC units are ideal for hotels, nursing homes, dormitories, and other similar settings. They allow each room’s occupant to adjust their room’s temperature as needed without affecting other units in the building. They are also popular in apartments and condos.
• VTAC units are similar to PTACs, but installed vertically for areas where space is limited or you want to have the unit more concealed.Ductless mini splits can cool 1-8 rooms without any sort of ductwork.
• Portable ACs can be moved where you need them to be. 

Common Features and Specs to Look For

While air conditioners come in different models and sizes, they all have common features in general that you’ll want to consider:

1. Cooling capacity

An AC unit’s cooling power is measured in BTUs (British Thermal Units). The higher the BTU rating, the more powerful the air conditioner is and the larger the space or room it can service.

The size of the room dictates the minimum BTUs needed to cool it. Proper sizing is crucial: too high, and the unit will cycle on and off, too low, and it won’t cool the space effectively.

2. Energy efficiency

All air conditioners sold in the US have an energy efficiency rating displayed on the label.  Window ACs use Combined Energy Efficiency Ratio (CEER), while larger AC units use Seasonal Energy Efficiency Ratio (SEER). The higher the number, the more efficient the unit is.

EnergyStar certification is also a good indicator of energy efficiency. AC units with the EnergyStar label followed stringent criteria set by the US Department of Energy and the Environmental Protection Agency, making them up to 40% more efficient than their non-certified counterparts.

For 2024, the EnergyStar program has also launched a Most Efficient category for different household appliances, which you can see here.

3. Smart features

Smart functions are what differentiates the best AC units from their mid-tier counterparts. These could include WiFi connectivity that enables control via smartphone apps, voice assistant support, and automation.

These also allows the AC to be integrated in a smart home setup, allowing the creation of routines, schedules, geo-fencing, and preprogrammed actions.

4. Air quality 

In the wake of the Covid-19 pandemic and the increased focus on safety, some premium AC units feature advanced filters that isolate dust, allergens, and other pollutants not commonly removed by normal filters.

Some AC units also offer ionizers, UV light, or air purifier functions.

5. Noise level

Some of the best AC units boast noise suppression technologies such as dampeners and premium build materials. The operating noise is measured in decibels (dB).The lower the dB rating, the quieter the unit is, making them ideal for bedrooms and living areas.

6. Refrigerant

The EPA has begun phasing out older HFC-based refrigerants like R410-A. Make sure your new AC is future-proof by using new A2L refrigerants like R32, which are more efficient, less toxic, and better for the environment.

7. Inverter technology

Inverter-equipped ACs can adjust the speed of the compressor based on demand, instead of going full blast all the time. This allows them to be more energy efficient, quieter, cool the space faster, and have longer operational life than conventional AC units.

The Best Air Conditioners for 2024

1. Window AC

Affordable and easy to install, window AC units are suitable for single rooms.

What to look for:

BTU Rating: Choose based on room size (5,000-12,000 BTUs).

EER Rating: Look for units with an EER of 10 or higher.

Noise Level: Aim for units below 60 dB.

Features: Remote control, programmable timer, energy-saving mode.

Best Window AC for 2024

Friedrich CCW12B10B 12000 BTU Chill Premier Smart Window Air Conditioner

The Chill Premier Series is Friedrich’s Premium Line of “smart” room air conditioners. This particular model has 12,000 BTUs of cooling and boasts an 11.4 CEER rating. This is achieved through the use of R32 refrigerant, and meets the requirements for use in California and Washington.

This is also a smart unit, meaning it comes with integrated WiFi that allows you to control the unit from your smartphone, giving you the freedom to control it from anywhere. Other features include energy saving mode, 8-way air flow control, and QuietMaster technology that makes it 25% quieter than regular window ACs.

2. Through-the-Wall AC

Through the wall ACs offer permanent installation and don’t block windows. They are also ideal for thicker walls.

What to look for:

BTU Rating: Similar to window units, based on room size.

EER Rating: Look for high efficiency units.

Installation Kit: Ensure it includes a proper sleeve and seal.

Best Through the Wall AC for 2024

GE AJCQ12DWJ 12000 BTU Through-the-Wall Room Air Conditioner

Operating at an impressive 12,000/11,800 BTUs, GE’s this through-the-wall AC is great for large, windowless rooms or for people who want a more permanent yet easy-to-replace solution. This unit is Energy Star certified and boasts 10.5 CEER and EER ratings.

This unit is WiFi enabled with a built-in GE SmartHQ communication card built right in. It offers a true built in look with only a minimal 5″ extension into the room with front, whereas competitor units require a 7.5 minimum extension into the room with front.

3. Mini Splits

Mini split systems offer unmatched energy efficiency. They don’t need ductwork and can cool and heat multiple zones.

What to look for:

BTU Rating: This is calculated per indoor unit, based on the size of the zone.

SEER Rating: Look for 16 or higher for better efficiency.

Features: Wi-Fi control, inverter technology for better efficiency.

Best Single-zone Mini Split for 2024

Friedrich FPHW121A 12000 BTU, 21.7 SEER2 Floating Air Pro Series Single Zone Mini Split with Built-In WiFi – Heat and Cool

This single zone mini split system includes both the FPHSW12A1B wall unit and the FPHSR12A1A outdoor compressor. It features high efficiency ratings including a 22.0 SEER, 21.7 SEER2 and 13.0 EER.

The 12,000 BTUs will cool a room that is about 600 sq. ft. Additionally, the 13,000 BTU heat pump will work hard to keep you warm. It can output 7,500 BTUs at 17°F but with its low ambient heating capacity, will provide heat even with temperatures down to -4°F. If you need to cool a server room or other equipment year round, this unit’s low ambient cooling features make it a great choice. 

Friedrich’s Pro Series Floating Air ACs feature built-in WiFi and access to FriedrichGo App for wireless control, as well as Google Assistant and Alexa voice commands.

Best Multi-zone Mini Split for 2024

Daikin 4MXS36WMVJU9 36000 BTU Configurable Quad-Zone Heat & Cool

The Daikin MXS 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. The MXS Multi-Zone Series also includes an enhanced drain pan. The new drain pan offers excellent drainage to reduce ice build-up in extreme conditions

This outdoor unit can connect up to four units with cooling capacities totaling 48,000 BTUs. Depending on the indoor units you choose, with the 4MXS36WMVJU9 outdoor unit you will be able to achieve energy efficiency levels of up to 20.6 SEER, up to 11.8 EER, and up to 9.7 HSPF, in non-ducted installations

4. PTAC (Packaged Terminal Air Conditioner)

Commonly used in hotels and multi-occupancy residential buildings, PTACs offer both heating and cooling, without the ductwork needed by central AC, and with less noise than window ACs.

What to look for:

BTU Rating: Generally between 7,000-15,000 BTUs.

EER/SEER Rating: Higher ratings for energy savings.

Heating Options: Look for units with heat pumps for efficiency.

Noise Level: Important for hotel rooms.

Best PTAC for 2024

Friedrich PVH12K3FC 12000 BTU Class FreshAire Series with Inverter Technology PTAC Air Conditioner with Heat Pump

Friedrich FreshAire Series PTAC units are the most advanced PTAC units. The FreshAire line features a fully integrated make-up air system while still offering the quiet sound levels and efficiency levels you have come to expect from Friedrich. They can be used in both commercial and residential applications.

This model s a 12,000 BTU cooling PTAC (4,700/13,800 BTUs {min./max.}) with 11,500 BTUs reverse cycle heat pump (6,995/16,187 BTUs {min./max.}) as well as back-up electric resistive heat. Additionally, it boasts an EER of 12.08.

In addition to boasting inverter technology and the latest R32 refrigerant, it features an integrated makeup air system. Friedrich FreshAire PTACs are the only PTACs that meet ASHRAE 62.1-2013 requirements delivering up to 52 CFM of conditioned, MERV 8 filtered make-up air.

5. VTAC (Vertical Terminal Air Conditioner)

Like the PTAC, VTACs are self-contained air conditioners typically used in commercial applications like hotels, apartments, and offices. The difference is that while PTACs are installed horizontally on an exterior wall, VTACs are installed vertically in a closet or utility room. They are ideal when space is limited and aesthetic considerations are important.

What to look for:

Dimensions: This is the first consideration to ensure the unit fits within the closet or utility room.

BTU Rating: Match the BTU rating to the size of the space.

EER and SEER: Look for units with an EER of 10 or higher, and 14 or above SEER.

Noise Level: Ideally below 55 dB for quiet operation.

Features: 

• Heat pump vs. electric heat: Heat pumps are more energy-efficient, while electric heat is typically less expensive upfront but costs more to operate.
• Auto-restart: To restart the unit at the previous settings after a power outage.
• Self-diagnostic function: Provides error codes for easy troubleshooting and maintenance.

Best VTAC for 2024

GE AZ9VH12DAC 12000 BTU Class (Range of 5200-16200 BTUs) 11.6 EER2 Zoneline Ultimate V11 VTAC with Heat Pump

The GE Zoneline Vertical Packaged Terminal Heat Pump has excellent COP (Coefficient of Performance) ratings. This model boasts a COP of 3.4. It features 11.6 EER2, 15.5 SEER2 and 6.5 HSPF2 ratings. 

The new AZ9VH Ultimate V11 Series Heat Pump will operate to 0°F. This helps provide owners with a cost efficient method of heating. Additionally, the outdoor coils include a corrosion treatment for added protection from the elements. New features for the AZ9VH12DAC Ultimate V11 Series includes an inverter driven, variable speed compressor. AND it offers ultra-low heat pump operation down to 0°F!

It features a heat pump and offers a nominal cooling capacity of 11,700 BTUs with a  cooling range capacity of 5,200 – 16,200 BTUs. It also offers a nominal heating capacity of 10,800 BTUs with a heat pump capacity range of 4,500 – 13,000 BTUs. This unit also offers optional WiFi compatibility with GE’s Smart HQ WiFi.

6. Portable AC

Portable ACs, also known as evaporative air conditioners or swamp coolers, have the flexibility of being moved where they are needed. They are useful to cool seldom-used areas, or for cooling temporary spaces.

What to look for:

Vented vs ventless: Vented portable ACs require a hose and exhaust to the outside to expel moisture, while ventless models use an evaporative cooling process to dispel the need for venting.

BTU Rating: Match the BTU rating to the room size for optimal cooling.

EER Rating: Look for units with an EER of 10 or higher.

Dehumidifying Capacity: Check the pints per day (PPD) rating for dehumidification performance.

Features:

• Dual-hose: More efficient, uses one hose to intake air and another to exhaust hot air.
• Caster wheels and handles for easier handling and movement.
• Self-evaporative system: Minimizes the need to empty the water tank by evaporating the moisture collected during cooling.

Best Portable Air Conditioner for 2024 (Residential)

Friedrich ZCP10SA 10000 BTU ZoneAire Compact Portable Air Conditioner with Built-In WiFi

This compact portable air conditioner provides three distinct functions in one convenient unit: air conditioning, dehumidification, and heat.

This single hose unit features 10,000 BTU cooling capacity, perfect for smaller spaces up to about 300 sq. ft. It has a single snap-in hose which can be extended from 8″ up to 60″. The window slider installation kit allows for horizontal or vertical window openings from 24.5″ to 50″, while the extension kit can be used on sliding patio doors up to 87″.

This unit also includes built-in WiFi for on the go control through the FriedrichGo app. It also works with Amazon Alexis and Google Home.

Best Portable Air Conditioner for 2024 (Commercial)

Kwikool KIB2421 Iceberg Series 23,500 BTU Portable Separated Air Cooling System

KwiKool’s Iceberg Series line of portable coolers is an ideal solution for server and IDF rooms. It offers a separated air system which helps to recirculate cooled air while expelling hot air.

This model features 23,500 BTUs (2 ton), uses 230 volt electricity and has a footprint of 20.325″w x 41″d x 43.5″h. It is compact enough to fit in a small space but powerful enough to cool effectively. All Iceberg KIB units include hi-tech microprocessor controls and self-diagnostics in addition to its standard features.

These features include three fan speeds, a 5-gallon condensate tank with overflow float switch for manual emptying as well as an internal high lift condensate pump for direct drain option (if connecting to drain, do not use/connect tank), auto-speed which automatically sets the fan speed based on the heat load demand, filter dryer for moisture protection and an easy access service door.

As always, our excellent sales team is available to answer any questions you may have regarding our extensive line of AC units. 

Please don’t hesitate to contact us to get the best air conditioner for your needs!