What design features of Sprouse products translate to energy-efficiency? Pretty much all of them. From innovative glass packages and technologically-advanced spacer systems to durable weatherseals and vinyl profiles with insulating chambers, Sprouse windows and doors offer peak performance year round. Commonly, U-values, R-values and the Solar Heat Gain Coefficient are the tools used to measure the energy performance of a window or door.

U & R Values
The U-value measures how much heat loss or gain can be transferred through a window or door. The lower the U-value, the greater its resistance to heat flow and the better its insulating value. U-value measurements generally fall between 0.20 and 1.20. For windows and doors, a low U-Value means less heat can enter the home during warmer months and less heat is able to escape during colder months. The opposite of the U-value is the R-value. The R-value measures the ability of a window or door to resist heat transfer. The higher the R-value, the greater resistance the window or door has to heat gain or loss. During warmer months, a high R-value means more unwanted heat from the sun is kept out, and in colder months, a high R-value means heated air remains inside. Low E glass can help provide good U- and R-values.