There are a number of benefits that go along with single and double-hung windows, and sometimes one type is better than another. In general, double-hung is better for ventilation, though both can do well in that area. When you have double-hung windows, you can open both parts of the window and get a good air flow through the home. When it comes to safety, double-hung windows are great for homes with children since you can open just the top part of the window and leave the bottom closed.