What should an inspector look for in windows to gauge energy efficiency?

When assessing windows to determine their energy efficiency, one of the key factors to look for is the type of glazing used. Windows that feature triple or double glazing provide significant benefits in terms of energy efficiency compared to single-pane windows. This is primarily due to the additional layers of glass that create insulating air or gas spaces in between, reducing heat transfer, improving thermal performance, and minimizing drafts.

Double glazing consists of two glass panes, while triple glazing includes three panes, offering even greater insulation. The spaces between the panes can be filled with inert gases such as argon or krypton, which further enhance the window's ability to retain heat in the winter and keep heat out during the summer, leading to reduced energy consumption for heating and cooling.

In contrast, window design architecture, brand, and intentional weathering signs are less indicative of energy efficiency. While architectural design can affect the overall aesthetics and functionality of a building, it does not directly correlate to energy performance. The brand may influence quality, but it is the glazing technique that has the most direct impact on energy efficiency. Intentional weathering signs would indicate potential issues or degradation but do not inherently speak to the energy efficiency capability of the window. Thus, focusing on the type of glazing is crucial in