Center of glass shgc before door frame 0 05 0 025.

U factor and shgc standard french doors. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone. U factor shgc solar heat gain coefficient product type any awning casement double hung fixed casement french door horizontal slider picture window side lite transom single hung sliding glass door storefront door storefront window. 0 2 0 4 0 5 0 3 0 1 0 6 0. The lower the coefficient the better the glazed door is at blocking the sun s heat.

Bi part 168 x 92 or single slide 96 x 92 no transom 1 glass 10 bottom rail 2 muntin narrow stiles. U factor is the rate at which a window door or skylight conducts non solar heat flow. All simpson doors have met the air leakage 0 3 requirement. U factors on windows generally range from 0 25 to 1 25.

In general finding glass with the lowest u rating is optimal in that it will help homeowners better utilize heating. It does not factor in solar heat from direct sunlight. The window u rating is reflected as a number between 0 20 and 1 20. It s usually expressed in units of btu hr ft2 of.

2 solar heat gain coefficient shgc defines the fraction of solar radiation admitted through the glass both directly transmitted and absorbed and subsequently released inward. 0 06 0 18 recommend. U value shgc explained. A lower u value is considered better i e.

Solar heat gain coefficient shgc shgc measures the amount of solar radiation transmitted through a window expressed as a number between 0 and 1. In addition to u factor shgc and vt simpson doors have been tested for air leakage a more recent requirement for some states and municipalities. The aluminium frame including glass with a low u value has a higher resistance to heat flow and has a higher insulating value. Solar heat gain coefficient shgc.

Please note that some designs may have different values based on the components and or glass type specified for the door. When selecting aluminium windows and aluminium doors for your home or building project you will often be required to comply with certain performance values for energy efficiency. Glazed doors in hot or temperate climates should have a low shgc. The lower the shgc the less solar heat the window transmits.

The u value measures how well a product prevents heat conducting through the whole window frame and glass. Nfrc u factor ratings however represent the entire window performance including frame and spacer material. Center of glass shgc before door frame 0 30 0 45 0 21 0 31 0 45 0 57. Door values represent tempered glass.

Posted november 01 2015.

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