For window replacement, U-factor and SHGC are the two window metrics Title 24 evaluates, with targets set by your project's energy model.
U-factor vs SHGC
- U-factor — insulating performance (lower is better)
- SHGC — solar heat gain (lower reduces cooling load)
Title 24 is a statewide California energy code. Window Replacement projects follow the same statewide standards; the exact requirements depend on your project's scope and address, which we model in CEC-approved compliance software.
Related: Window Replacement Title 24 overview · pricing · Title 24 guide.