U.S. Department of Energy Energy Efficiency & Renewable Energy U.S. Department of Energy Energy Efficiency & Renewable Energy

Window Choice for Chicago

Question: 

Which one of the following NFRC-rated windows would you recommend for windows in Chicago?

(a). U-0.35 SHGC-0.20

(b). U-0.27 SHGC-0.25

(c). U-0.35 SHGC-0.30

(d). U-0.40 SHGC-0.35