diff --git a/scripts/ep_workflow.py b/scripts/ep_workflow.py
index 009e337f..31643f23 100644
--- a/scripts/ep_workflow.py
+++ b/scripts/ep_workflow.py
@@ -4,25 +4,17 @@ import sys
 from pathlib import Path
 import csv
 
-sys.path.append('../hub')
+from hub.imports.geometry_factory import GeometryFactory
+from hub.imports.construction_factory import ConstructionFactory
+from hub.imports.usage_factory import UsageFactory
+from hub.exports.exports_factory import ExportsFactory
+from hub.exports.energy_building_exports_factory import EnergyBuildingsExportsFactory
+from hub.helpers.dictionaries import Dictionaries
+
 sys.path.append('./')
 
-from imports.geometry_factory import GeometryFactory
-from imports.construction_factory import ConstructionFactory
-from imports.usage_factory import UsageFactory
-from exports.exports_factory import ExportsFactory
-from exports.energy_building_exports_factory import EnergyBuildingsExportsFactory
-
-
 try:
-  gml = ''
-  for argument_tuple in sys.argv[1:]:
-    print(argument_tuple)
-    argument = argument_tuple.split(' ')
-    option = argument[0]
-    value = argument[1]
-    if option == '-g':
-      gml = value
+  file_path = (Path(__file__).parent.parent / 'input_files' / 'selected_building.geojson')
   out_path = (Path(__file__).parent.parent / 'out_files')
   files = glob.glob(f'{out_path}/*')
   for file in files:
@@ -30,17 +22,16 @@ try:
       os.remove(file)
 
   print('[simulation start]')
-  city = GeometryFactory('citygml', gml).city
-  print(f'city created from {gml}')
-  for building in city.buildings:
-    building.year_of_construction = 2006
-    if building.function is None:
-      building.function = 'large office'
-  for building in city.buildings:
-    print(building.function)
-  ConstructionFactory('nrel', city).enrich()
+  city = GeometryFactory('geojson',
+                         path=file_path,
+                         height_field='heightmax',
+                         year_of_construction_field='ANNEE_CONS',
+                         function_field='CODE_UTILI',
+                         function_to_hub=Dictionaries().montreal_function_to_hub_function).city
+  print(f'city created from {file_path}')
+  ConstructionFactory('nrcan', city).enrich()
   print('enrich constructions... done')
-  UsageFactory('comnet', city).enrich()
+  UsageFactory('nrcan', city).enrich()
   print('enrich usage... done')
 
   area = 0
@@ -52,9 +43,6 @@ try:
 
   print('exporting:')
 
-  ExportsFactory('obj', city, out_path).export()
-  print('    geometry exported...')
-  # todo: _idf exporter does not catch errors in exporting
   _idf = EnergyBuildingsExportsFactory('idf', city, out_path).export_debug()
   print('    idf exported...')
   _idf.run()