Ufactor Low E Glass Door

If the door is equal to or less than 50 percent glass it is considered to be an opaque door.

Ufactor low e glass door.

Low e glass reflects heat out in the summer and keeps the warmth inside a building in the winter leaving your home feeling more comfortable while saving energy. Having low e glass on your storm door and storm windows helps reduce fading on hardwood floors and curtains. Pgt builds custom aluminum vinyl and impact resistant house windows doors and porch enclosures. Think about all the sunlight that comes into your entry way.

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. That means the gases effectively block the air exchange between outside and inside. Although opaque doors are included in the definition of fenestration area in the 2018 iecc and 2018 irc they are assigned a maximum u factor of 0 35 separate from the u factor requirements for vertical fenestration. If you live in an extremely cold climate the hard coat low e glass may be an option for you because it allows some of the sun s short wave infrared energy to pass through the glass.

The lower the u factor the more energy efficient the window door or skylight. Winguard premiervue spectraguard and eze breeze. Is it worth it. Extremely thin coatings of special low emissivity low e metallic material are applied to glass panes used in windows and doors to boost their energy efficiency.

Double pane clear and low e coated glass are rated for energy efficiency based on the u factor solar heat gain factor and visible light transmittance. Andersen doors and windows that use low e4 and low e glass have a u factor between 0 27 and 0 30. Products that use low e4 and low e glass include certain 200 series fixed units and tilt windows 400 series gliding windows roof windows and skylights and several models of andersen architectural window. The u factor measures the thermal performance of the glass in terms of how well it transfers heat into or out of the building.

Solar heat gain coefficient shgc i is the fraction of solar radiation admitted through a window door or skylight either transmitted directly and or absorbed and subsequently released as heat inside a home. In addition to energy savings low e glass protects from fading. This helps to heat your home in the winter and allows the glass to reflect the interior long wave heat energy back inside. Glass doors by definition in the iecc are considered to be those which are more than 50 percent glass in area.