Look for a window air conditioner with a high Combined Energy-Efficiency Ratio rating. CEER is the efficiency rating that ...

The process of testing window air conditioners is identical to how we tested portable AC units. First, we heated a climate-controlled room to 92 degrees Fahrenheit.

If your home isn't equipped with central air, installing a window or portable air conditioner, or even using a combination of ...

Portable air conditioners tend to use energy less efficiently, meaning they are often not as powerful as window air conditioners. However, you can still find energy-efficient portable options that ...

Once the unit is installed, you can't open and close your window to let fresh air in. On the other hand, setting up and removing a portable air conditioner is easy.

Portable air conditioner vs. window unit: Which one should you get? by: Matthew Young, BestReviews Staff Posted: Jun 11, 2025 / 09:00 AM PDT Updated: Jun 11, 2025 / 09:08 AM PDT ...