The window u rating is reflected as a.
Vinyl window shgc values texas.
It has rating values of 0 to 1 and just like the u factor rating lower values are better for hot climates like the one in northern california.
The lower a window s solar heat gain coefficient the less solar heat it transmits.
Product line cpd number u factor shgc frame type pg climate zones.
N nc sc s.
A window s u value also described as u factor measures the rate the window transfers non solar heat.
Solar heat gain coefficient shgc 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.
Product line cpd number u factor shgc frame type pg climate zones.
Whether a higher or lower shgc is desirable depends on the climate.
Shgc is expressed as a number between 0 and 1.
In short it provides a measurable indication of the quality of insulation the window provides.
The lower the shgc the less solar heat it transmits and the greater its shading ability.
One of the most important ratings to pay attention to when looking for new windows is the glasses u value.