diff --git a/src/Transition/CreateNewIDFUsingRulesV24_1_0.f90 b/src/Transition/CreateNewIDFUsingRulesV24_1_0.f90
index f03ce7b8555..9ef12a40cf9 100644
--- a/src/Transition/CreateNewIDFUsingRulesV24_1_0.f90
+++ b/src/Transition/CreateNewIDFUsingRulesV24_1_0.f90
@@ -429,14 +429,22 @@ SUBROUTINE CreateNewIDFUsingRules(EndOfFile,DiffOnly,InLfn,AskForInput,InputFile
                 nodiff=.false.
 
                 ! read in 8 reference value for the effectiveness at 75% and 100%
-                HxEffectAt75Airflow(1) = TRIM(InArgs(6))    ! Sensible Effectiveness at 75% Heating Air Flow
-                HxEffectAt75Airflow(2) = TRIM(InArgs(7))    ! Latent Effectiveness at 75% Heating Air Flow
-                HxEffectAt75Airflow(3) = TRIM(InArgs(10))   ! Sensible Effectiveness at 75% Cooling Air Flow
-                HxEffectAt75Airflow(4) = TRIM(InArgs(11))   ! Latent Effectiveness at 75% Cooling Air Flow
-                HxEffectAt100Airflow(1) = TRIM(InArgs(4))   ! Sensible Effectiveness at 100% Heating Air Flow
-                HxEffectAt100Airflow(2) = TRIM(InArgs(5))   ! Latent Effectiveness at 100% Heating Air Flow
-                HxEffectAt100Airflow(3) = TRIM(InArgs(8))   ! Sensible Effectiveness at 100% Cooling Air Flow
-                HxEffectAt100Airflow(4) = TRIM(InArgs(9))   ! Latent Effectiveness at 100% Cooling Air Flow
+                ! Sensible Effectiveness at 75% Heating Air Flow
+                HxEffectAt75Airflow(1) = GetFieldOrIDDDefault(InArgs(6), FldDefaults(6))
+                ! Latent Effectiveness at 75% Heating Air Flow
+                HxEffectAt75Airflow(2) = GetFieldOrIDDDefault(InArgs(7), FldDefaults(7))
+                ! Sensible Effectiveness at 75% Cooling Air Flow
+                HxEffectAt75Airflow(3) = GetFieldOrIDDDefault(InArgs(10), FldDefaults(10))
+                ! Latent Effectiveness at 75% Cooling Air Flow
+                HxEffectAt75Airflow(4) = GetFieldOrIDDDefault(InArgs(11), FldDefaults(11))
+                ! Sensible Effectiveness at 100% Heating Air Flow
+                HxEffectAt100Airflow(1) = GetFieldOrIDDDefault(InArgs(4), FldDefaults(4))
+                ! Latent Effectiveness at 100% Heating Air Flow
+                HxEffectAt100Airflow(2) = GetFieldOrIDDDefault(InArgs(5), FldDefaults(5))
+                ! Sensible Effectiveness at 100% Cooling Air Flow
+                HxEffectAt100Airflow(3) = GetFieldOrIDDDefault(InArgs(8), FldDefaults(8))
+                ! Latent Effectiveness at 100% Cooling Air Flow
+                HxEffectAt100Airflow(4) = GetFieldOrIDDDefault(InArgs(9), FldDefaults(9))
 
                 ! Remove the 4 fields for 75% airflow and adjust the index of the fields
                 OutArgs(1:5) = InArgs(1:5)
diff --git a/src/Transition/InputProcessor.f90 b/src/Transition/InputProcessor.f90
index 20b9aac917b..0cbac20e2ac 100644
--- a/src/Transition/InputProcessor.f90
+++ b/src/Transition/InputProcessor.f90
@@ -4814,6 +4814,28 @@ FUNCTION IPTrimSigDigits(IntegerValue) RESULT(OutputString)
 
 END FUNCTION IPTrimSigDigits
 
+FUNCTION GetFieldOrIDDDefault(InArgString, FldDefaultString)  RESULT (ResultString)
+
+          ! PURPOSE OF THIS SUBROUTINE:
+          ! If InArgString is Blank, replace with FldDefaultString
+
+  IMPLICIT NONE    ! Enforce explicit typing of all variables in this routine
+
+
+          ! FUNCTION ARGUMENT DEFINITIONS:
+  CHARACTER(len=*), INTENT(IN)    :: InArgString        ! Input String
+  CHARACTER(len=*), INTENT(IN)    :: FldDefaultString   ! Default String
+  CHARACTER(len=LEN(InArgString)) :: ResultString       ! Result String
+
+  ResultString=InArgString
+  IF (ResultString == Blank) THEN
+    ResultString = FldDefaultString
+  ENDIF
+
+  RETURN
+
+END FUNCTION GetFieldOrIDDDefault
+
 !     NOTICE
 !
 !     Copyright © 1996-2009 The Board of Trustees of the University of Illinois
@@ -4839,4 +4861,3 @@ END FUNCTION IPTrimSigDigits
 !
 
 END MODULE InputProcessor
-