Rq, or the R-value, is a measure of thermal resistance used in the building and construction industry. It indicates how well a material can insulate against heat flow; the higher the R-value, the better the insulation. This value is crucial for energy efficiency in homes and buildings, helping to maintain comfortable indoor temperatures. In addition to its role in insulation, Rq is also relevant in the context of energy efficiency ratings for appliances and systems. Understanding Rq helps consumers make informed choices about materials and products, ultimately leading to reduced energy costs and a smaller environmental footprint.