6 Best Wall Air Conditioners | April 2017

We spent 32 hours on research, videography, and editing, to review the top selections for this wiki. They are not just ideal for cooling and heating conservatories, attics, basements and other unfinished spaces, although they do all of that particularly well. Our comprehensive selection of wall air conditioners can also lend a hand to an older or undersized central a/c system, and ensure you and your family live in comfort all year round. Skip to the best wall air conditioner on Amazon.
6 Best Wall Air Conditioners | April 2017
Overall Rank: 3
Best Mid-Range
Overall Rank: 1
Best High-End
Overall Rank: 2
Best Inexpensive
The durable LG LT1036CE has a patented, gold fin anti-corrosion coating that provides a protective shield from the elements, so it lasts longer. It requires installation of a special 230 volt electrical outlet, though, and will not operate with a standard household outlet.
  • remote control included
  • cools a room up to 450 square feet
  • a little louder than similar models
Brand LG
Model LT1236CER
Weight 90 pounds
Rating 3.8 / 5.0
The Friedrich Master Series has updated, contemporary styling and commercial grade durability. It is designed to fit a standard 27 inch sleeve, making it the perfect replacement for outdated and inefficient units. It comes with a washable, antimicrobial filter.
  • impact resistant front cover
  • electronic defrost control
  • wall master sleeve sold separately
Brand Friedrich
Model WS12D3A
Weight 113 pounds
Rating 4.0 / 5.0
The convenient Keystone KSTAT features a temperature-sensing LCD remote control that allows you to see, set and maintain the perfect temperature from across the room. It can also dehumidify up to 2.5 pints per hour and has three cooling modes for flexibility.
  • 24 hour programmable timer
  • cools most medium sized rooms
  • does not have a heating mode
Brand Keystone
Model KSTAT12-1C
Weight 86.9 pounds
Rating 4.0 / 5.0
The Pioneer Ductless Mini Split uses inverter technology for superior cooling and heating that will save you money on your utility bills. It offers the perfect solution for home additions, conversions, or for those who want the ultimate independent zone control.
  • ultra quiet operation
  • auto restarts in power failure
  • requires professional installation
Brand PIONEER Air Conditioner
Model WYE012GLFI15RL
Weight 100 pounds
Rating 4.8 / 5.0
The budget-friendly Koldfront WTC offers cooling, heating and a dehumidification capacity of up to 30 pints per day. It features an energy saver mode that cycles the fan at 10 minute intervals, but will still turn the compressor back on if the temperature gets too high.
  • coverage for 550 square feet
  • three fan speeds with an auto option
  • weather seals included
Brand Koldfront
Model WTC12001W
Weight pending
Rating 4.6 / 5.0
The Senville SENA is an 18,000 BTU model that also functions as a heat pump in winter. The sleek, high quality design can cool a larger area than most wall units, making it suitable for living rooms and other areas where a standard wall model falls short.
  • 7 year warranty on compressor
  • insulated copper line included
  • self-diagnosis system
Brand Senville
Model SENA-18HF
Weight 111.3 pounds
Rating 4.8 / 5.0

Buyer's Guide

What Exactly Is Conditioned Air, Anyway?

Air conditioning (AC) works according to the same basic operating principle as refrigeration. And this is apt, as you can imagine your home, or car, or office as representing a closed environment where cool air is being locked in, thereby keeping the temperature low.

Most air conditioners draw hot air in from the outside. That air is immediately filtered through a compressor, along with some form of refrigerant (e.g., Freon or an equivalent type of hydrochlorofluorocarbon). That air's temperature increases as it is filtered through the compressor. The heated - and highly-pressurized - vapor is then passed into a condenser, which cools the air by way of coils. These coils are working in conjunction with the refrigerant.

The AC's refrigerant continues along with the air through a tiny hole which is known as an expansion valve. The air's temperature is reduced even more as it negotiates this valve. The now-frigid air and refrigerant make their way into an evaporator coil, where any remaining liquid is, well, evaporated. The ice-cold air is systematically blown out into a confined space via an exhaust fan. The excess refrigerant is cycled back and liquefied to begin the cooling process once more.

AC 101: A Troubleshooting Guide

When it comes to summer, a lot of people are only as good as their air conditioners allow them to be. With that in mind, we'd like to present a few easy-to-fix air conditioning problems. We have resigned these issues to everyday wall units. If you have an AC problem that is connected to a central cooling system, it's better to call in a professional who has some expertise.

The most common issue with any window AC unit is that it takes to blowing out hot air. There are two recurring reasons for this. The first is that a screen is clogged, in which case all you need to do is remove the screen, which is located behind the front vent, then hose it down. The second major cause of hot air is a lack of coolant (AKA refrigerant). This is an easy fix, as well, although you'd be wise to consult an owner's manual. That manual can tell you what type of coolant to use, along with where to pour said coolant into the tank.

If your AC is on, but it isn't blowing any air, the first thing you'll want to check is the front vent. This vent is prone to getting closed unintentionally, thereby preventing any air from getting out. If your AC isn't turning on at all, check to see if any in-house circuits, or fuses have been tripped. If a circuit has blown, it's recommended that you reduce the amount of electricity you have pulling off that breaker.

If you've attempted each of these solutions to no avail, your unit may be in need of a more significant repair.

A Brief History Of The Air Conditioner

The earliest seeds of what we now regard as air conditioning lead back to Ancient Egypt, where moistened reeds were hung in windows. As the cold water on these reeds evaporated, it served to cool the air that was entering each room. Fast forward to the late 19th Century, at which point certain advances had led to people storing or harvesting large chunks of ice (often by way of an early ice-making machine), which they could then place behind a fan, cooling the air that was blowing straight through.

The first modern air conditioner was invented by an American man named Willis Carrier in 1904. Carrier based his invention on several early evaporation experiments that had been conducted by the likes of Benjamin Franklin and (Cambridge Professor) John Hadley. As air conditioners moved into mass production during the 1920s, the guiding principle continued to be that of using volatile liquids to cool the air as it passed through a series of coils or chambers (see "What Exactly Is Conditioned Air?" above).

Carrier had initially designed his AC to help solve a manufacturing problem. Too much heat was slowing down the gears at Mr. Carrier's place of business. Carrier's electro-mechanical cooling system solved the problem, and it also led to the realization that lower temperatures resulted in increased productivity. Carrier started his own air conditioning company in 1915. At first, this company was catering to corporate clients. But after the Depression, Carrier expanded his interests by offering cost-effective ways to cool the average home.

Innovations came quickly during the second half of the 20th Century. Today, it is estimated that nearly 90% of all new homes in the U.S. have been designed with some type of central ventilation built in. What's more, the Carrier Corporation, which was originally known as the Carrier Air Company of America, has grown into a $13-billion business that employs a little over 45,000 employees.

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Last updated on April 22 2017 by Tina Morna Freitas

Tina Morna Freitas is a writer who lives in Chicago with her family and two cats. She enjoys making and sipping margaritas and aspires to be a crazy cat lady once all the children are grown.