Premium = Warm Edge Triple Heat Shield Argon Technology with foam filled frame.
- Exceptionally Low Air Infilitration Rating
- Triple Pane - Double Strength - Heat Shield Glass
- Heatseal® Spacer with Argon Fill
- Beautfil Beveled Foam Insulated Frame and Sash
- Full Interlock with Triple Weather-Stripping
- NFRC U-Factor: 0.20 Air Infiltration: <0.01 Solar Heat Gain: 0.27