5A NE-5 Boston, MA 5A Chicago, IL 6.3.2 Glass skylight properties 5B Boise, ID 6A Burlington, VT 6B Helena, MT 7 Duluth, MN 8 Fairbanks, AK The description and skylight visible transmittance (Tvis), solar heat gain coefficient (SHGC) and thermal transmittance (U-factor) properties are...