diff --git a/hub/city_model_structure/energy_systems/generic_generation_system.py b/hub/city_model_structure/energy_systems/generic_generation_system.py
index fa885a3c..f5737fee 100644
--- a/hub/city_model_structure/energy_systems/generic_generation_system.py
+++ b/hub/city_model_structure/energy_systems/generic_generation_system.py
@@ -228,3 +228,74 @@ class GenericGenerationSystem:
     :param value: string
     """
     self._supply_medium = value
+
+    # self._heat_output_curve = None
+    # self._heat_fuel_consumption_curve = None
+    # self._heat_efficiency_curve = None
+    # self._cooling_output_curve = None
+    # self._cooling_fuel_consumption_curve = None
+    # self._cooling_efficiency_curve = None
+
+  @property
+  def maximum_heat_supply_temperature(self):
+    """
+    Get maximum heating supply temperature in degree Celsius
+    :return: float
+    """
+    return self._maximum_heat_supply_temperature
+
+  @maximum_heat_supply_temperature.setter
+  def maximum_heat_supply_temperature(self, value):
+    """
+    Set maximum heating supply temperature in degree Celsius
+    :param value: float
+    """
+    self._maximum_heat_supply_temperature = value
+
+  @property
+  def minimum_heat_supply_temperature(self):
+    """
+    Get minimum heating supply temperature in degree Celsius
+    :return: float
+    """
+    return self._minimum_heat_supply_temperature
+
+  @minimum_heat_supply_temperature.setter
+  def minimum_heat_supply_temperature(self, value):
+    """
+    Set minimum heating supply temperature in degree Celsius
+    :param value: float
+    """
+    self._minimum_heat_supply_temperature = value
+
+  @property
+  def maximum_cooling_supply_temperature(self):
+    """
+    Get maximum cooling supply temperature in degree Celsius
+    :return: float
+    """
+    return self._maximum_cooling_supply_temperature
+
+  @maximum_cooling_supply_temperature.setter
+  def maximum_cooling_supply_temperature(self, value):
+    """
+    Set maximum cooling supply temperature in degree Celsius
+    :param value: float
+    """
+    self._maximum_cooling_supply_temperature = value
+
+  @property
+  def minimum_cooling_supply_temperature(self):
+    """
+    Get minimum cooling supply temperature in degree Celsius
+    :return: float
+    """
+    return self._minimum_cooling_supply_temperature
+
+  @minimum_cooling_supply_temperature.setter
+  def minimum_cooling_supply_temperature(self, value):
+    """
+    Set minimum cooling supply temperature in degree Celsius
+    :param value: float
+    """
+    self._minimum_cooling_supply_temperature = value