When it comes to energy efficiency, not all windows are created equal. It is estimated that about 25%-30% of homeowners’ energy use is wasted when unwanted heat is lost or retained through windows. Old windows are less airtight and were built before we knew what we now know about thermal energy and window design. Understanding energy efficiency can help guide your selection of replacement windows to reduce your consumption of energy and lower your monthly energy costs by up to 13%.
Selecting Windows
Explore Energy Star and NFRC (National Fenestration Rating Council) labels and scores to help you learn about the energy properties of each window type and compare different brands and types of windows. Think about your climate and research the best types of windows for achieving efficiency in that zone. Certain windows are designed with technical features to retain or reduce heat depending on whether the climate is cooler or warmer. Additionally, you might consider different types of replacement windows for the sides of your home that receive the most direct sunlight.
Proper Installation
Windows manufactured for prime efficiency will only serve their purpose if they are installed with high levels of knowledge and skill. In fact, some window companies will void a warranty in the case of improper installation. Make sure that your contractor is reputable and properly credentialed to install the chosen type of replacement windows, along with flashing and air sealing. Have the contractor instruct you about cleaning and maintaining the windows, so you can keep the windows at peak efficiency.