Slat Option 2: NRC 0.10–0.50., Slat Option 5: NRC 0.80., Slat Random: NRC 0.35–0.70., Standard parallel slotted patterns: NRC 0.45–0.60., Standard parallel slotted pattern + bulk insulation: NRC 0.55–0.65., V-Slotted Patterns: NRC 0.40–0.60., V-slotted pattern + bulk insulation: NRC 0.75., Perforated Panel: NRC 0.70–0.90.