What You Need to Know About Air Leakage

When you’re looking for new replacement windows, you must choose the best ones. A smart homeowner would check the energy efficiency ratings, such as the solar heat gain coefficient or U-factor. These ratings measure the window’s ability to insulate and regulate heat loss. 

The air leakage window rating is another factor you should consider, although many homeowners tend to forget about it. To learn more about air leakage, take the time to read this article from window company Renewal by Andersen® of Long Island. 

What Is Air Leakage?

Also known as air infiltration, air leakage is the measurement of air that can pass through your window assembly. Many homeowners think that new windows will create a vacuum, making it impossible for air to pass through them. However, keep in mind that all windows have many parts, and air can sneak through anything. 

Like the U-factor and visible transmittance, the National Fenestration Ratings Council or NFRC is responsible for the air leakage window rating. It is measured on a scale of 0.1 to 0.3, with 0.1 being the least amount of air that passes through the window. As such, you should look for a window with a lower number as this means fewer drafts. To ensure that number remains where it’s at, hire experienced professionals for your windows installation. 

Why Do Air Leakage Ratings Matter?

Unfortunately, air leakage is not a required window rating. Some companies even leave it out of the discussion, which can be a red flag. When buying new windows, be sure to ask for the air leakage window rating. As long as the window has a rating below 0.3, it is deemed energy efficient by the NFRC and Energy Star. If you are looking for ways to save money and increase energy efficiency, choose windows with ratings closer to 0.1. 

Additionally, it’s important to note that air leakage ratings below 0.1 are not recognized by the NFRC. This is because the NFRC thinks that the difference is so low that no one can tell them apart. Nevertheless, you shouldn’t overlook this window rating. Every aspect of your windows matters, especially if you’re looking for a durable one. If a company is trying to sell you on a single rating, they are probably lacking in other categories. 

When it comes to window installation, trust only the professionals. Turn to our experts at Renewal by Andersen® of Long Island. We offer quality windows, including sliding windows and many more. Call us today at (866) 609-5033 or fill out our contact form to set an appointment. We also proudly serve residents in Massapequa.