Tax Credit on New Windows and Doors
There is certain terminology to be understood in determining the energy efficiency of products and if they qualify for the credits available:
U Factor - The U-factor is a standard measure of heat transfer through an entire window unit. The methods for measuring U-factor ratings were developed by the National Fenestration Rating Council (NRFC) at the request of the US Department of Energy and the Federal Trade Commission. The lower the U-factor is, the better the window's insulating ability. (A window's U-factor is the reciprocal of its R-factor, they both measure its insulating ability.) Look for windows with a low U-factor and high R values.
SHGC - solar heat gain coefficient The SHGC is the fraction of incident solar radiation that actually passes through that window, radiation that is both directly transmitted and that which is absorbed and subsequently released inwardly by re-radiation and conduction. SHGC is expressed as a number between 0 and 1. The lower a window's solar heat gain coefficient, the less solar heat it transmits.
Windows & Doors Exterior Windows and Skylights with a U factor <= 0.30 and a SHGC <= 0.30 qualify for 30% of cost, up to $1,500.
Not all ENERGY STAR labeled windows and skylights qualify for tax credit.
Some Approved Products
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