What type of window is most energy-efficient?

The most energy-efficient type of window among the options provided is the triple-glazed window. Triple-glazed windows consist of three layers of glass with spaces in between, which are often filled with insulating gases. This design significantly reduces heat transfer compared to single or double-glazed options, leading to better insulation and minimized energy loss.

The multiple layers in triple-glazed windows provide superior thermal resistance, which helps maintain comfortable indoor temperatures regardless of outside conditions. They also offer better sound insulation than single or double-glazed windows due to the additional layers of glass, creating an effective barrier to outside noise.

In contrast, while double-glazed windows are indeed more energy-efficient than single-pane windows, they do not provide the same level of insulation as triple-glazed windows. Single-pane windows have less thermal resistance and allow for more substantial heat transfer, making them the least energy-efficient option. Wood-frame windows can provide good insulation, but their energy efficiency largely depends on the glazing and the materials used in the frame rather than the frame itself. Thus, when considering thermal performance and energy efficiency, triple-glazed windows stand out as the best choice.