diff --git a/hub/exports/building_energy/idf.py b/hub/exports/building_energy/idf.py
index ba66a1dd..d1422fe2 100644
--- a/hub/exports/building_energy/idf.py
+++ b/hub/exports/building_energy/idf.py
@@ -466,7 +466,7 @@ class Idf:
 
   def _add_infiltration_surface(self, thermal_zone, zone_name):
     schedule = f'INF_CONST schedules {thermal_zone.usage_name}'
-    _infiltration = thermal_zone.infiltration_rate_area_system_off
+    _infiltration = thermal_zone.infiltration_rate_area_system_off*2
     self._idf.newidfobject(self._INFILTRATION,
                            Name=f'{zone_name}_infiltration',
                            Zone_or_ZoneList_or_Space_or_SpaceList_Name=zone_name,
@@ -576,7 +576,7 @@ class Idf:
             self._add_schedules(usage, 'Activity Level', _new_schedules)
             self._add_zone(thermal_zone, building.name)
             self._add_heating_system(thermal_zone, building.name)
-            self._add_infiltration(thermal_zone, building.name)
+            self._add_infiltration_surface(thermal_zone, building.name)
             self._add_ventilation(thermal_zone, building.name)
             self._add_occupancy(thermal_zone, building.name)
             self._add_lighting(thermal_zone, building.name)