Yes. Today’s windows are better designed and more insulating than ever. Windows fall into two main categories: operable—windows that open in some way, either on hinges or by sliding and non-operable (also called fixed)—those that do not open.
When it comes to energy efficiency, non-operable windows are the most airtight. Among operable windows, hinged windows (awning, casement, hopper or tilt and turn models) are typically the most airtight because the closing mechanism helps pull the window tight against the frame.
In fact, ENERGY STAR® windows, doors and skylights can decrease your energy costs by about 6% saving you about $75 a year.