NOTE: U-value ranges are for comparison purposes only. Performance ranges vary with window size and glass type. Low range U-values calculated at AAMA test size with 1" IGU - ¼" soft coat low-e (#2), ½" warm-edge spacer with argon, ¼" hard coat low-e (#4). High range U-values calculated at NFRC test size with 1" IGU - ¼" soft coat low-e (#2), ¼" warm-edge spacer with argon, ¼" clear. G400 values include a ¼" clear interior panel. Energy models are all calculated using NFRC-approved software created by a third-party agency. Contact your Peerless Sales Representative for performance values based on project specific sizes and glazing.