The ordinary sash latches that act as double-hung window locks may help squeeze out drafts, but they offer little protection ...

They’re usually more airtight than double-hung windows because the sash locks tightly against the frame when closed. But window air conditioners can’t be installed in casement windows.

In our lab tests, Double-hung window models like the A-Series are rated on multiple criteria, such as those listed below. Wind resistance 0 degrees: Wind resistance measures each window's ability ...