While setting up your own air conditioning unit may sound daunting, today’s DIY-ready units are far more manageable and safer than you m ...

Best Window AC Units of 2025: See at CNET Below we'll outline when to change your AC filter and how to swap it the right way to guarantee your AC unit runs properly and efficiently.

In this guide, we reveal expert-backed tips for installing a window air conditioner—and our recommendations for the best units for your home.

To do so, pop your AC filter out and hold it up to the light. If you can't see through the filter, then it's time for a new one. Below, find step-by-step instructions on how to change out your filter.

How to install your portable air conditioner 1. Choose a location near a window and outlet Your portable AC needs several feet of unobstructed floor space so it receives adequate airflow.

Experts share tips on proper AC unit cleaning and basic maintenance. Plus, the best cleaning products and air filters to shop.