diff --git a/hub/exports/building_energy/idf_helper/idf_infiltration.py b/hub/exports/building_energy/idf_helper/idf_infiltration.py
index 87d0e269..240238fa 100644
--- a/hub/exports/building_energy/idf_helper/idf_infiltration.py
+++ b/hub/exports/building_energy/idf_helper/idf_infiltration.py
@@ -24,7 +24,7 @@ class IdfInfiltration(IdfBase):
     self._write_to_idf_format(file, calculation_method, 'Design Flow Rate Calculation Method')
     self._write_to_idf_format(file, idf_cte.EMPTY, 'Design Flow Rate')
     self._write_to_idf_format(file, idf_cte.EMPTY, 'Flow Rate per Floor Area')
-    self._write_to_idf_format(file, idf_cte.EMPTY, 'Flow Rate per Exterior Surface Area')
+    self._write_to_idf_format(file, infiltration, 'Flow Rate per Exterior Surface Area')
     self._write_to_idf_format(file, infiltration, 'Air Changes per Hour')
     self._write_to_idf_format(file, 1, 'Constant Term Coefficient')
     self._write_to_idf_format(file, 0, 'Temperature Term Coefficient')