We may receive a commission on purchases made from links. A window air conditioner can be a lifesaver in a heatwave, but how do you install one in a horizontal sliding window? Most window air ...

The first time I installed an air conditioning unit—heaving and wedging it with no small effort onto the sill of a fourth-floor bedroom window—I was shocked that more units don’t fall out and plummet ...

Learn how to install a central air conditioning and heating system from start to finish. This detailed guide walks you through replacing an old HVAC unit and setting up a brand-new Senville system, ...