diff --git a/src/EnergyPlus/HeatBalanceManager.cc b/src/EnergyPlus/HeatBalanceManager.cc
index 6e7b0ef9619..14764c56d5b 100644
--- a/src/EnergyPlus/HeatBalanceManager.cc
+++ b/src/EnergyPlus/HeatBalanceManager.cc
@@ -4707,8 +4707,8 @@ namespace HeatBalanceManager {
         // This subroutine only gets called once in the GetConstructionData subroutine
 
         // ASHRAE Handbook Fundamental 2005
-        // Thermal resistance of the inside air film, m2.K/W. Average of 0.14 (heat flow up) and 0.11 (heat flow down)
-        Real64 constexpr Rfilm_in(0.125);
+        // Thermal resistance of the inside air film, m2.K/W. Average of 0.16 (heat flow down) and 0.11 (heat flow up)
+        Real64 constexpr Rfilm_in(0.135);
         // Thermal resistance of the outside air film used in calculating the Ffactor, m2.K/W. 0.17/5.678
         Real64 constexpr Rfilm_out(0.03);