Check your current filter. The easiest way to find the size you need is to look at the filter that's already inside of your ...

By Mary H.J. Farrell Size matters when you’re buying a window air conditioner. An air conditioner that’s too small will ...

This calculation will tell you the number of British Thermal Units (BTU) needed to cool your home effectively. It’s best to leave these calculations to the pros. Sizing the air conditioner ...