Frequently Asked Questions About Energy-Efficient Windows

When shopping for replacement windows, you’ll come across numerous products that promise superior energy efficiency. Are these products really worth the hype? To know for sure, it’s important to have a good grasp of essential facts about energy-efficient windows. In this post, Renewal by Andersen® of Portland answers some of the questions that you may have about energy-efficient windows.

What Are “Gas-Filled Windows”?

Window manufacturing techniques have evolved through the years, and gas-filled windows are one of the best developments. With this technology, an inert gas is sealed between window panes to improve the insulating capacity of the window. Argon is commonly used in gas-filled windows as it insulates better than regular air.

What Is Low-E Glass?

Low-E (low emittance) glass is a type of glass that reduces the transmission of UV rays from the outside to the inside. It also minimizes glare and improves the thermal efficiency of a window. If you are planning for window replacement and keen on lowering your cooling expenses, you should definitely choose windows with low-E glass.

How Are R-Value and U-Value Different From Each Other?

The important thing to remember is that R-value is mainly used as reference for wall and ceiling insulation, while U-value is used as an indication for windows and other fenestration products. Lower U-values in windows mean greater efficiency in keeping the heat or cold outside your home.

When it comes to window replacement, look no further than Renewal by Andersen of Portland. Our excellent workmanship and quality window products can ensure value for your money. Call us at (503) 912-2668 or fill out our contact form to request a free estimate. We serve customers in Portland, OR.