Window Energy Ratings Scale

Window energy ratings the window energy rating wer tells you how energy efficient your windows are.

Window energy ratings scale.

Solar heat gain and u factor. When manufacturing installing or choosing windows and doors you need more than. The energy performance of all energy star qualified windows doors and skylights must be independently tested certified and verified according to test procedures established by the national fenestration rating council nfrc. Understanding a bit about the window energy label its ratings and how they indicate a windows energy efficiency can help you make better buying decisions.

This radiation can cause your home to heat regardless of outside temperature which. The national fenestration rating council nfrc operates a voluntary program that tests certifies and labels windows doors and skylights based on their energy performance ratings. Each year the average american household spends 1 500 2 500 on energy bills. The window s insulating value is indicated by the r value which is the inverse of the u value.

The bfrc energy window label utilises a traffic light a to e scale on the basis of total energy efficiency where an a rated window is the most energy efficient. The circled value shows you the rating a door has received. 45 of that cost is for heating and cooling. The three other window energy ratings are the solar heat gain coefficient shgc visible transmittance vt and air infiltration or air leakage.

U factor ratings for windows generally fall between 0 20 and 1 20. Solar heat gain coefficient measures how well a product can resist unwanted direct or indirect solar radiation. The scheme is similar to those seen on household appliances white goods and light bulbs. The lower the u value the greater a window s resistance to heat flow and the better its insulating value.

The nfrc label provides a reliable way to determine a window s energy properties and to compare products. Find out how bfrc ratings can help you. Nfrc is a third party non profit organization that sponsors certified rating and labeling to help consumers. A window product s rating is listed at the top of the label using a letter and associated colour band.

The rating system is based on a scale of e to a with a windows being the most energy efficient. The other three are somewhat less important to energy performance according to energy star but can help you judge how well a window or door will perform in a particular application for example whether it ll let in enough light. Our instantly recognisable rainbow ratings can now help you prove acoustic performance too with bfrc noise reduction ratings. Choosing high performance windows doors and skylights can save you money and keep your home comfortable.

Bfrc is the uk s most trusted ratings council with the most widely used rating system for energy performance in window and doors.