Accu-Weld. The Haddon Signature series comprises three Energy Starlabeled and NFRC-rated window lines offering good-better-best performance. Accu-Vision windows feature a 15-chamber, foam-filled, beveled vinyl frame and come with Solarban60 insulating glass for an R-value of 3.33 and a U-factor of 0.30. Accu-Safe offers the same features, but with tempered and laminated double-strength glass for added security and sound reduction, as well as improved R-value (3.44) and U-factor (0.29). Finally, Eco-Green builds on Accu-Vision with triple-pane glass to reach an R-value of 5 and a U-factor of 0.20. 800.782.6347. www.accuweld.com.