Portable air conditioners, window air conditioners, and more cooling models are marked down at Amazon’s Fourth of July sale.

You might see an EER (Energy Efficiency Ratio) number for your portable air conditioner, which measures the cooling ...

To help you make an informed decision, we'll compare portable and window ACs and highlight their main features so you can decide what makes sense for you.

LG LW2217IVSM Air Conditioner, $672 Photo: LG This uber energy efficient monster 140000 BTU window unit will hand you energy savings of up to 40 percent along with lo-decibel, low-noise ...

Also on our list of the best window air conditioners is this LG 8,000 BTU LW8016ER unit, which drops from $299 to $269 at Abt. That’s a current price low from any reputable site by $10.

However, LG also makes window air conditioners that can be semi-permanently placed in the window space. These are ideal for rooms where air conditioning will always be desired.

LG 6,000 BTU Window Air Conditioner. Best for: Midsize rooms Looking for something a little bigger? Try this model from LG, which works on spaces up to 250 square feet.

Two window air conditioners that look identical can vary significantly in cooling power. Just look at our top pick: The Midea U-Shaped AC has models rated at 8,000, 10,000 and 12,000 BTUs.

Portable air conditioners are a versatile alternative to window units because you can easily move them from room to room. Also known as stand-up air conditioners, they take in air from the room aro… ...