diff --git a/hub/city_model_structure/building_demand/thermal_archetype.py b/hub/city_model_structure/building_demand/thermal_archetype.py
index 242e5104..30c33e23 100644
--- a/hub/city_model_structure/building_demand/thermal_archetype.py
+++ b/hub/city_model_structure/building_demand/thermal_archetype.py
@@ -20,8 +20,8 @@ class ThermalArchetype:
     self._indirect_heated_ratio = None
     self._infiltration_rate_for_ventilation_system_off = None
     self._infiltration_rate_for_ventilation_system_on = None
-    self._infiltration_rate_area_for_ventilation_system_off=None
-    self._infiltration_rate_area_for_ventilation_system_on=None
+    self._infiltration_rate_area_for_ventilation_system_off = None
+    self._infiltration_rate_area_for_ventilation_system_on = None
 
   @property
   def constructions(self) -> [Construction]:
@@ -141,7 +141,7 @@ class ThermalArchetype:
     Get infiltration rate for ventilation system off in l/s/m2
     :return: float
     """
-    return self._infiltration_rate_for_ventilation_system_off
+    return self._infiltration_rate_area_for_ventilation_system_off
 
   @infiltration_rate_area_for_ventilation_system_off.setter
   def infiltration_rate_area_for_ventilation_system_off(self, value):
@@ -149,7 +149,7 @@ class ThermalArchetype:
     Set infiltration rate for ventilation system off in l/s/m2
     :param value: float
     """
-    self._infiltration_rate_for_ventilation_system_off = value
+    self._infiltration_rate_area_for_ventilation_system_off = value
 
   @property
   def infiltration_rate_area_for_ventilation_system_on(self):
@@ -157,7 +157,7 @@ class ThermalArchetype:
     Get infiltration rate for ventilation system on in l/s/m2
     :return: float
     """
-    return self._infiltration_rate_for_ventilation_system_on
+    return self._infiltration_rate_area_for_ventilation_system_on
 
   @infiltration_rate_area_for_ventilation_system_on.setter
   def infiltration_rate_area_for_ventilation_system_on(self, value):
@@ -165,4 +165,4 @@ class ThermalArchetype:
     Set infiltration rate for ventilation system on in l/s/m2
     :param value: float
     """
-    self._infiltration_rate_for_ventilation_system_on = value
+    self._infiltration_rate_area_for_ventilation_system_on = value