diff --git a/hub/catalog_factories/energy_systems/montreal_custom_catalog.py b/hub/catalog_factories/energy_systems/montreal_custom_catalog.py
index d731f781..8d2eb256 100644
--- a/hub/catalog_factories/energy_systems/montreal_custom_catalog.py
+++ b/hub/catalog_factories/energy_systems/montreal_custom_catalog.py
@@ -135,7 +135,7 @@ class MontrealCustomCatalog(Catalog):
       equipment_id = float(equipment['@id'])
       equipment_type = equipment['@type']
       model_name = equipment['name']
-      parasitic_consumption = None
+      parasitic_consumption = 0
       if 'parasitic_consumption' in equipment:
         parasitic_consumption = float(equipment['parasitic_consumption']['#text']) / 100
 
diff --git a/hub/catalog_factories/energy_systems/montreal_future_system_catalogue.py b/hub/catalog_factories/energy_systems/montreal_future_system_catalogue.py
index d2eb35c3..b6d7f9f5 100644
--- a/hub/catalog_factories/energy_systems/montreal_future_system_catalogue.py
+++ b/hub/catalog_factories/energy_systems/montreal_future_system_catalogue.py
@@ -248,7 +248,7 @@ class MontrealFutureSystemCatalogue(Catalog):
         system_id = None
         model_name = None
         system_type = None
-        parasitic_energy_consumption = None
+        parasitic_energy_consumption = 0
         emission_system = EmissionSystem(system_id=system_id,
                                          model_name=model_name,
                                          system_type=system_type,