Guardian: When you want to let the heat in and keep it in

Guardian introduces a new advanced architectural glass for cooler climate zones where passive heat gain is desired. SunGuard Neutral 78/65 combines the highest visible light transmission of any SunGuard product and high solar heat gain coefficient with a sought-after neutral color. Neutral
78/65 can be used in dual and triple glazed configurations and with other SunGuard high performance low-E coatings. Guardian SunGuard Neutral 78/65 helps architects meet new energy codes in heating-dominated climates.  https://www.sunguardglass.com