diff --git a/city_model_structure/city_object.py b/city_model_structure/city_object.py
index 5d368ff1..5babaf5d 100644
--- a/city_model_structure/city_object.py
+++ b/city_model_structure/city_object.py
@@ -15,7 +15,7 @@ from shapely.geometry import MultiPolygon
 import numpy as np
 
 import matplotlib.patches as patches
-from helpers.geometry import Geometry
+from helpers.geometry_helper import GeometryHelper
 from city_model_structure.usage_zone import UsageZone
 
 
@@ -35,7 +35,7 @@ class CityObject:
     self._year_of_construction = year_of_construction
     self._function = function
     self._lower_corner = lower_corner
-    self._geometry = Geometry()
+    self._geometry = GeometryHelper()
     self._average_storey_height = None
     self._storeys_above_ground = None
     self._foot_print = None
diff --git a/city_model_structure/polyhedron.py b/city_model_structure/polyhedron.py
index 9fdaa2cd..d1665029 100644
--- a/city_model_structure/polyhedron.py
+++ b/city_model_structure/polyhedron.py
@@ -5,7 +5,7 @@ Copyright © 2020 Project Author Guille Gutierrez guillermo.gutierrezmorote@conc
 """
 import numpy as np
 import stl
-from helpers.geometry import Geometry
+from helpers.geometry_helper import GeometryHelper
 
 
 class Polyhedron:
@@ -20,7 +20,7 @@ class Polyhedron:
     self._faces = None
     self._vertices = None
     self._mesh = None
-    self._geometry = Geometry()
+    self._geometry = GeometryHelper()
 
   def _position_of(self, point):
     vertices = self.vertices
diff --git a/config/configuration.ini b/config/configuration.ini
index 9322833d..81cdb84f 100644
--- a/config/configuration.ini
+++ b/config/configuration.ini
@@ -14,6 +14,3 @@ indirectly_heated_area_ratio = 0
 infiltration_rate_system_on = 0
 outside_solar_absorptance = 0.2
 shortwave_reflectance = 0.8
-
-
-#EOF
\ No newline at end of file
diff --git a/geometry/geometry_feeders/city_gml.py b/geometry/geometry_feeders/city_gml.py
index b9948711..fead90b0 100644
--- a/geometry/geometry_feeders/city_gml.py
+++ b/geometry/geometry_feeders/city_gml.py
@@ -8,7 +8,7 @@ import numpy as np
 from city_model_structure.city import City
 from city_model_structure.city_object import CityObject
 from city_model_structure.surface import Surface
-from helpers.geometry import Geometry
+from helpers.geometry_helper import GeometryHelper
 
 
 class CityGml:
@@ -32,7 +32,7 @@ class CityGml:
         'http://www.opengis.net/citygml/2.0': None
       }, force_list=('cityObjectMember', 'curveMember'))
       self._cityObjects = None
-      self._geometry = Geometry()
+      self._geometry = GeometryHelper()
       envelope = self._gml['CityModel']['boundedBy']['Envelope']
       if '#text' in envelope['lowerCorner']:
         self._lower_corner = np.fromstring(envelope['lowerCorner']['#text'], dtype=float, sep=' ')
diff --git a/helpers/configuration_helper.py b/helpers/configuration_helper.py
new file mode 100644
index 00000000..02d4cd66
--- /dev/null
+++ b/helpers/configuration_helper.py
@@ -0,0 +1,91 @@
+"""
+Configuration helper
+SPDX - License - Identifier: LGPL - 3.0 - or -later
+Copyright © 2020 Project Author Guille Gutierrez guillermo.gutierrezmorote@concordia.ca
+"""
+import configparser
+from pathlib import Path
+
+
+class ConfigurationHelper:
+  """
+  Configuration class
+  """
+  def __init__(self):
+    base_path = Path().resolve().parent
+    config_file = Path(base_path / 'libs/config/configuration.ini').resolve()
+    self._config = configparser.ConfigParser()
+    self._config.read(config_file)
+
+  @property
+  def h_i(self):
+    """
+    Configured internal convective coefficient in W/m2K
+    :return: float
+    """
+    return self._config.getfloat('convective_fluxes', 'h_i')
+
+  @property
+  def h_e(self):
+    """
+    Configured external convective coefficient in W/m2K
+    :return: float
+    """
+    return self._config.getfloat('convective_fluxes', 'h_e')
+
+  @property
+  def frame_ratio(self):
+    """
+    Configured frame ratio
+    :return: float
+    """
+    return self._config.getfloat('windows', 'frame_ratio')
+
+  @property
+  def heated(self):
+    """
+    Configured heated flag
+    :return: Boolean
+    """
+    return self._config.getboolean('thermal_zones', 'heated')
+
+  @property
+  def cooled(self):
+    """
+    Configured cooled flag
+    :return: Boolean
+    """
+    return self._config.getboolean('thermal_zones', 'cooled')
+
+  @property
+  def additional_thermal_bridge_u_value(self):
+    """
+    Configured additional thermal bridge u value W/m2K
+    :return:
+    """
+    return self._config.getfloat('thermal_zones', 'additional_thermal_bridge_u_value')
+
+  @property
+  def indirectly_heated_area_ratio(self):
+    """
+    Configured indirectly heated area ratio
+    :return: float
+    """
+
+    return self._config.getfloat('thermal_zones', 'indirectly_heated_area_ratio')
+
+  @property
+  def infiltration_rate_system_on(self):
+    """
+    Configured infiltration rate system on in air change per hour
+    :return: float
+    """
+    return self._config.getfloat('thermal_zones', 'infiltration_rate_system_on')
+
+  @property
+  def outside_solar_absorptance(self):
+    """
+    Configured infiltration rate system off in air change per hour
+    :return: float
+    """
+    return self._config.getfloat('thermal_zones', 'outside_solar_absorptance')
diff --git a/helpers/geometry_helper.py b/helpers/geometry_helper.py
new file mode 100644
index 00000000..a2558392
--- /dev/null
+++ b/helpers/geometry_helper.py
@@ -0,0 +1,165 @@
+"""
+Geometry helper
+SPDX - License - Identifier: LGPL - 3.0 - or -later
+Copyright © 2020 Project Author Guille Gutierrez guillermo.gutierrezmorote@concordia.ca
+"""
+import math
+import numpy as np
+from trimesh import Trimesh
+from trimesh import intersections
+import open3d as o3d
+
+
+class GeometryHelper:
+  """
+  Geometry helper class
+  """
+  def __init__(self, delta=0.5):
+    self._delta = delta
+
+  def almost_equal(self, v1, v2):
+    """
+    Compare two points and decides if they are almost equal (quadratic error under delta)
+    :param v1: [x,y,z]
+    :param v2: [x,y,z]
+    :return: Boolean
+    """
+    delta = math.sqrt(pow((v1[0] - v2[0]), 2) + pow((v1[1] - v2[1]), 2) + pow((v1[2] - v2[2]), 2))
+    return delta <= self._delta
+
+  def is_almost_same_surface(self, s1, s2):
+    """
+    Compare two surfaces and decides if they are almost equal (quadratic error under delta)
+    :param s1: Surface
+    :param s2: Surface
+    :return: Boolean
+    """
+    # delta is grads an need to be converted into radians
+    delta = np.rad2deg(self._delta)
+    difference = (s1.inclination - s2.inclination) % math.pi
+    if abs(difference) > delta:
+      return False
+    # s1 and s2 are at least almost parallel surfaces
+    # calculate distance point to plane using all the vertex
+    # select surface1 value for the point (X,Y,Z) where two of the values are 0
+    minimum_distance = self._delta + 1
+    parametric = s2.polygon.get_parametric()
+    n2 = s2.normal
+    for point in s1.points:
+      distance = abs(
+        (point[0] * parametric[0]) + (point[1] * parametric[1]) + (point[2] * parametric[2]) + parametric[3])
+      normal_module = math.sqrt(pow(n2[0], 2) + pow(n2[1], 2) + pow(n2[2], 2))
+
+      if normal_module == 0:
+        continue
+      distance = distance / normal_module
+      if distance < minimum_distance:
+        minimum_distance = distance
+      if minimum_distance <= self._delta:
+        break
+    if minimum_distance > self._delta or s1.intersect(s2) is None:
+      return False
+    else:
+      return True
+
+  @staticmethod
+  def to_points_matrix(points, remove_last=False):
+    """
+    Transform a point vector into a point matrix
+    :param points: [x, y, z, x, y, z ...]
+    :param remove_last: Boolean
+    :return: [[x,y,z],[x,y,z]...]
+    """
+    rows = points.size // 3
+    points = points.reshape(rows, 3)
+    if remove_last:
+      points = np.delete(points, rows - 1, 0)
+    return points
+
+  @staticmethod
+  def _segment_list_to_point_cloud(segment_list):
+    point_list = np.asarray(segment_list[0])
+    for segment in segment_list:
+      for new_point in segment:
+        found = False
+        for point in point_list:
+          same_point = np.allclose(new_point, point)
+          if same_point:
+            found = True
+            break
+        if not found:
+          point_list = np.concatenate((point_list, [new_point]))
+    return point_list
+
+  @staticmethod
+  def _point_cloud_to_mesh(point_list, normal_list):
+    # Return a mesh composed only by triangles
+    pcd = o3d.geometry.PointCloud()
+    pcd.points = o3d.utility.Vector3dVector(point_list)
+    pcd.normals = o3d.utility.Vector3dVector(normal_list)
+    distances = pcd.compute_nearest_neighbor_distance()
+    avg_dist = np.mean(distances)
+    radius = 3 * avg_dist
+    bpa_mesh = o3d.geometry.TriangleMesh().create_from_point_cloud_ball_pivoting(
+      pcd, o3d.utility.DoubleVector([radius, radius * 2]))
+    mesh_result = Trimesh(vertices=np.asarray(bpa_mesh.vertices), faces=np.asarray(bpa_mesh.triangles))
+    return mesh_result
+
+  @staticmethod
+  def _merge_meshes(mesh1, mesh2):
+    v_1 = mesh1.vertices
+    f_1 = mesh1.faces
+    v_2 = mesh2.vertices
+    f_2 = mesh2.faces
+    length = len(v_1)
+    v_merge = np.concatenate((v_1, v_2))
+    f_merge = np.asarray(f_1)
+
+    for item in f_2:
+      point1 = item.item(0) + length
+      point2 = item.item(1) + length
+      point3 = item.item(2) + length
+      surface = np.asarray([point1, point2, point3])
+      f_merge = np.concatenate((f_merge, [surface]))
+
+    mesh_merge = Trimesh(vertices=v_merge, faces=f_merge)
+
+    return mesh_merge
+
+  @staticmethod
+  def divide_mesh_by_plane(mesh, normal_plane, point_plane):
+    """
+    Divide a mesh by a plane
+    :param mesh: Trimesh
+    :param normal_plane: [x, y, z]
+    :param point_plane: [x, y, z]
+    :return: [Trimesh]
+    """
+    # The first mesh returns the positive side of the plane and the second the negative side.
+    # If the plane does not divide the mesh (i.e. it does not touch it or it is coplanar with one or more faces),
+    # then it returns only the original mesh.
+    normal_plane_opp = [None] * len(normal_plane)
+    for i in range(0, len(normal_plane)):
+      normal_plane_opp[i] = - normal_plane[i]
+
+    normal = [normal_plane, normal_plane_opp]
+    normal_opp = [normal_plane_opp, normal_plane]
+    mesh_final = []
+    for i in range(0, 2):
+      mesh_1 = intersections.slice_mesh_plane(mesh, normal[i], point_plane)
+      mesh_1_segments = intersections.mesh_plane(mesh, normal[i], point_plane)
+      boo = mesh.difference(mesh_1, engine='blender')
+      print(boo)
+      quit()
+      if len(mesh_1_segments) <= 0 or len(mesh_1.faces) == len(mesh.faces):
+        mesh_final.append(mesh)
+        break
+      else:
+        points = GeometryHelper._segment_list_to_point_cloud(mesh_1_segments)
+        points_normals = [[None] * 3] * len(points)
+        for j in range(0, len(points_normals)):
+          points_normals[j] = normal_opp[i]
+        mesh_2 = GeometryHelper._point_cloud_to_mesh(points, points_normals)
+        mesh_final.append(GeometryHelper._merge_meshes(mesh_1, mesh_2))
+
+    return mesh_final
diff --git a/tests/test_geometry_factory.py b/tests/test_geometry_factory.py
index 7d763035..77390fbc 100644
--- a/tests/test_geometry_factory.py
+++ b/tests/test_geometry_factory.py
@@ -23,7 +23,7 @@ class TestGeometryFactory(TestCase):
 
   def _get_citygml(self):
     if self._city_gml is None:
-      file_path = (self._example_path / 'buildings.gml').resolve()
+      file_path = (self._example_path / '2050 bp_2buildings.gml').resolve()
       self._city_gml = GeometryFactory('citygml', file_path).city
       self.assertIsNotNone(self._city_gml, 'city is none')
     return self._city_gml