U Factor Windows And Doors

Epa requires that the u factor for energy star labeled products is certified and listed on the product label.

U factor windows and doors.

The nfrc is a non profit group that administers a uniform independent rating and labeling system for the energy efficiency of building components including windows doors skylights and attachment products. A u factor rating generally refers to the entire window. Shgc measures how well a product keeps out solar heat. U factor is the rate at which a window door or skylight conducts non solar heat flow.

Triple glazed windows may have a u factor as low as 0 15. Nfrc u factor ratings however represent the entire window performance including frame and spacer material. We pride ourselves on quality craftsmanship reliability and our excellent reputation. This means you get a better quality window.

Simply put u factor measures how well a window keeps heat inside your home. High performance double pane windows can have u factors of 0 30 or lower while some triple pane windows can achieve u factors as low as 0 15. The u factor rating system was devised by the national fenestration rating council nfrc. It s a particularly important measure for climates with colder winters.

U factor values generally range from 0 25 to 1 25 and are measured in btu h ft f. Double paned windows may have a u factor at or below 0 30. Whether you are looking for windows doors or skylights we have the best products for you and your home. The lower the u factor the better the resistance to heat flow in and out of the window.

The optimal measure for your window will depend on your location. The label shows the solar heat gain coefficient shgc and u factor for the door. It s usually expressed in units of btu hr ft2 of. The u factor will approach the very low 0 15 point if there is a gas such as argon or krypton between the layers of glass glazing.

Look for a low shgc in a climate that mainly requires cooling and a high shgc in a climate that requires heating. For most energy efficient windows the whole window u factor is higher than the center of glass u factor. How to determine u factor for windows. The values for u factor range between 0 25 and 1 25.

The range is from 0 to 1. Low u factors are most important in heating dominated climates although they are also beneficial. Look for a low u factor. It s a measure of total heat flow through a window or door from room air to outside air.

Lower numbers indicate greater insulating capabilities. The lower the u factor the better the window insulates. The range is from 0 00 2 00. U factor measures the rate of heat transfer and tells you how well the window insulates.

At u factor window door we utilize the most trusted windows doors and skylights on the market. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.