diff --git a/city_model_structure/energy_systems/air_source_hp.py b/city_model_structure/energy_systems/air_source_hp.py
index 752f13b0..c6aeaa8a 100644
--- a/city_model_structure/energy_systems/air_source_hp.py
+++ b/city_model_structure/energy_systems/air_source_hp.py
@@ -1,21 +1,21 @@
 """
-heat_pump module defines a heat pump
+air_source_hp module defines an air source heat pump
 SPDX - License - Identifier: LGPL - 3.0 - or -later
 Copyright © 2020 Project Author Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
 Contributor Peter Yefi peteryefi@gmail.com
 """
 
 from typing import List
-from typing import Dict
+from city_model_structure.energy_systems.heat_pump import HeatPump
 
 
-class HeatPump:
+class AirSourceHP(HeatPump):
   """
-  HeatPump class
+  AirSourceHP class
   """
 
   def __init__(self):
-    self._model = None
+    super().__init__()
     self._cooling_capacity = None
     self._cooling_comp_power = None
     self._cooling_capacity_coff = None
@@ -25,23 +25,6 @@ class HeatPump:
     self._heating_capacity_coff = None
     self._heating_comp_power_coff = None
 
-  @property
-  def model(self) -> str:
-    """
-    Get model name
-    :return: str
-    """
-    return self._model
-
-  @model.setter
-  def model(self, value):
-    """
-    Set model (name, indicated in capacity)
-    :param value: str
-    """
-    if self._model is None:
-      self._model = value
-
   @property
   def cooling_capacity(self) -> List[float]:
     """