Room Air Conditioners for Areas Up To 400 Sq. Ft.

For easy, efficient cooling of smaller areas, a room air conditioner is an excellent choice. Today's ultra-compact models can easily handle spaces as large as 500 square feet, making them great for cooling bedrooms, living rooms, offices, and more. Portable room air conditioners are equipped with casters for easy maneuverability.
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Soleus LX-140 Portable AC
21 reviews
  • Covers 525 sq. ft.
  • 14,000 BTUs
  • Auto air louvers
List Price:
$636.95
Our Price:
$441.18
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Soleus LX-140 Portable AC
NewAir AC-14100E Portable AC
3 reviews
  • Cools up to 525 sq. ft.
  • 14,000 BTUs
  • New for this Season!
List Price:
$649.00
Our Price:
$499.95
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NewAir AC-14100E Portable AC
NewAir AC-10000E Portable AC
42 reviews
  • 10,000 BTUs
  • 325 sq. ft. coverage area
  • Our Best Value AC!
List Price:
$440.00
Our Price:
$399.95
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NewAir AC-10000E Portable AC
NewAir AC-12000E Portable AC
55 reviews
  • 12,000 BTUs
  • 425 sq. ft. coverage area
  • Our Top Rated AC!
List Price:
$519.00
Our Price:
$479.95
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NewAir AC-12000E Portable AC
Soleus PH3-12R-03 Portable AC
9 reviews
  • 12,000 BTUs
  • Covers 425 sq. ft.
  • Programmable timer
List Price:
$631.99
Our Price:
$408.24
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Soleus PH3-12R-03 Portable AC
American Comfort ACW200C Portable AC
  • 8,000 BTUs
  • Covers 150 sq. ft.
  • Includes a remote control
List Price:
$480.95
Our Price:
$329.95
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American Comfort ACW200C Portable AC
American Comfort ACW500C Portable AC
  • Cools 475 sq. ft.
  • 13,000 BTUs
  • Adjustable air louvers
List Price:
$662.95
Our Price:
$484.99
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American Comfort ACW500C Portable AC
Friedrich P09B Portable AC
  • 9,300 BTUs
  • Covers 200 sq. ft.
  • Programmable timer
List Price:
$580.95
Our Price:
$473.95
Friedrich P09B Portable AC
Amico Power AP14000 Portable AC
  • Cools up to 400 sq. ft.
  • 14,000 BTUs
  • Uses eco-friendly refrigerant
List Price:
$597.95
Our Price:
$446.24
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Amico Power AP14000 Portable AC
Comfort-Aire PD-121B Portable AC
  • 12,000 BTUs
  • Covers 550 sq. ft.
  • 3 fan speeds
List Price:
$1130.99
Our Price:
$820.99
Comfort-Aire PD-121B Portable AC
Soleus KY3-100 10,000 BTU Portable Air Conditioner
  • Covers 325 sq. ft.
  • 10,000 BTU
  • 3 speed settings
List Price:
$519.99
Our Price:
$373.49
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Soleus KY3-100 10,000 BTU Portable Air Conditioner
MobilComfort KY-80 Portable AC
15 reviews
  • Covers 125 sq. ft.
  • 8,000 BTUs
  • Adjustable air louvers
List Price:
$372.95
Our Price:
$281.18
MobilComfort KY-80 Portable AC


Common Room Air Conditioner Terms You'll Need to Know

Choosing the right room AC for your living space is easy when you know what to look for.  Before you go shopping, make sure you understand what these 3 important terms mean:

BTU: This is an acronym for "British Thermal Units" and a unit of energy used in the power and heating and cooling industries. In terms of air conditioners, this describes a unit's power and cooling capacity. The higher the BTU rating, the stronger the air conditioner.  Matching Btu requirements to room size is important. The room won't cool efficiently if the BTU rating is too low or too high for the size of the room.

EER: This stands for "Energy Efficiency Ratio."  This measures how energy efficient an air conditioner is at a specific level (usually 95° F), and can be calculated as a ratio of BTUs to the power input in watts.  The higher the EER, the more energy efficient the room air conditioner. 

Auto-Evaporative: A type of technology utilized by many portable room air conditioners involves evaporating condensed water and exhausting it through a main venting hose and through a window, drop ceiling, or wall. A room AC with auto-evaporative technology does not need to be frequently emptied (unless used in an extremely humid climate).

For more information on room air conditioners, take a look at our air conditioner buying guide

Additional Air Conditioner Resources & Articles: