Glass options
Different climates require different window technologies for best performance. We offer options ranging from standard clear insulating glass to energy-saving, Low-E insulating glass. Double- or triple-pane glass options with between-the-glass blinds or fabric shades can further increase energy savings and can even reduce outside noise — like lawn mowers and traffic. Pella Designer Series windows and patio doors with triple-pane glass are #1 for noise reduction when compared to top national brands with similar glazing. Laminated insulating glass is another great choice for increased energy efficiency and sound reduction.
Performance
For help gauging energy efficiency, look for a product's Solar Heat Gain Coefficient (SHGC) rating and U-values. The SHGC rating will tell you how effective the product is at blocking the heat caused by the sun (the lower the number, the less heat it allows in). U-values indicate how well the product keeps heat inside a home (the lower the number, the better it insulates). Pella's products offer some of the lowest U-values in the industry. Most Pella® products with Low-E insulating glass meet or exceed ENERGY STAR® guidelines in all 50 of the United States. In fact, we have some products that have U-values that significantly exceed U.S. ENERGY STAR guidelines.