diff --git a/src/blenderbim/blenderbim/bim/module/model/opening.py b/src/blenderbim/blenderbim/bim/module/model/opening.py
index 7a6a66cb53..384eb18e73 100644
--- a/src/blenderbim/blenderbim/bim/module/model/opening.py
+++ b/src/blenderbim/blenderbim/bim/module/model/opening.py
@@ -123,11 +123,45 @@ class AddFilledOpening(bpy.types.Operator, tool.Ifc.Operator):
         return {"FINISHED"}
 
     def generate_opening_from_filling(self, filling, filling_obj, voided_obj):
+        filling_type = ifcopenshell.util.element.get_type(filling)
+        if filling_type:
+            for filling_occurrence in ifcopenshell.util.element.get_types(filling_type):
+                if filling_occurrence == filling or not filling_occurence.FillsVoids:
+                    continue
+                return self.generate_opening_from_existing_filling_occurrence(filling_occurrence, filling_obj)
+
         profile = ifcopenshell.util.representation.get_representation(filling, "Model", "Profile", "ELEVATION_VIEW")
         if profile:
             return self.generate_opening_from_filling_profile(filling_obj, voided_obj, profile)
         return self.generate_opening_from_filling_box(filling_obj, voided_obj)
 
+    def generate_opening_from_existing_filling_occurrence(self, filling_occurrence, filling_obj):
+        for rel in getattr(filling_occurrence, "FillsVoids", []) or []:
+            settings = ifcopenshell.geom.settings()
+
+            shape = ifcopenshell.geom.create_shape(settings, rel.RelatingOpeningElement)
+            verts = shape.geometry.verts
+            faces = shape.geometry.faces
+            grouped_verts = [[verts[i], verts[i + 1], verts[i + 2]] for i in range(0, len(verts), 3)]
+            grouped_faces = [[faces[i], faces[i + 1], faces[i + 2]] for i in range(0, len(faces), 3)]
+
+            bm = bmesh.new()
+            bm.verts.index_update()
+            bm.faces.index_update()
+            new_verts = [bm.verts.new(v) for v in grouped_verts]
+            new_faces = [bm.faces.new((new_verts[f[0]], new_verts[f[1]], new_verts[f[2]])) for f in grouped_faces]
+
+            bm.verts.index_update()
+            bm.faces.index_update()
+
+            mesh = bpy.data.meshes.new(name="Opening")
+            bm.to_mesh(mesh)
+            bm.free()
+
+            obj = bpy.data.objects.new("Opening", mesh)
+            obj.matrix_world = filling_obj.matrix_world
+            return obj
+
     def generate_opening_from_filling_profile(self, filling_obj, voided_obj, profile):
         settings = ifcopenshell.geom.settings()
         settings.set(settings.INCLUDE_CURVES, True)
diff --git a/src/blenderbim/blenderbim/bim/module/type/operator.py b/src/blenderbim/blenderbim/bim/module/type/operator.py
index 82a9b2fada..07b736ef46 100644
--- a/src/blenderbim/blenderbim/bim/module/type/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/type/operator.py
@@ -126,19 +126,13 @@ class SelectSimilarType(bpy.types.Operator):
     def execute(self, context):
         self.file = IfcStore.get_file()
         related_object = bpy.data.objects.get(self.related_object) if self.related_object else context.active_object
-        oprops = related_object.BIMObjectProperties
-        product = self.file.by_id(oprops.ifc_definition_id)
-        declaration = IfcStore.get_schema().declaration_by_name(product.is_a())
-        if ifcopenshell.util.schema.is_a(declaration, "IfcElementType"):
-            related_objects = ifcopenshell.api.run(
-                "type.get_related_objects", self.file, **{"relating_type": self.file.by_id(oprops.ifc_definition_id)}
-            )
-        else:
-            related_objects = ifcopenshell.api.run(
-                "type.get_related_objects", self.file, **{"related_object": self.file.by_id(oprops.ifc_definition_id)}
-            )
+        relating_type = ifcopenshell.util.element.get_type(tool.Ifc.get_entity(related_object))
+        if not relating_type:
+            return {"FINISHED"}
+        related_objects = ifcopenshell.util.element.get_types(relating_type)
         for obj in context.visible_objects:
-            if obj.BIMObjectProperties.ifc_definition_id in related_objects:
+            element = tool.Ifc.get_entity(obj)
+            if element and element in related_objects:
                 obj.select_set(True)
         return {"FINISHED"}
 
diff --git a/src/blenderbim/test/bim/feature/type.feature b/src/blenderbim/test/bim/feature/type.feature
index 3636e75927..3cb1870954 100644
--- a/src/blenderbim/test/bim/feature/type.feature
+++ b/src/blenderbim/test/bim/feature/type.feature
@@ -148,3 +148,26 @@ Scenario: Select type objects
     When the object "IfcWallType/Empty" is selected
     And I press "bim.select_type_objects"
     Then the object "IfcWall/Cube" is selected
+
+Scenario: Select similar type
+    Given an empty IFC project
+    And I add a cube
+    And the object "Cube" is selected
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcWall"
+    And I press "bim.assign_class"
+    And I add a cube
+    And the object "Cube" is selected
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcWall"
+    And I press "bim.assign_class"
+    And I add an empty
+    And the object "Empty" is selected
+    And I set "scene.BIMRootProperties.ifc_product" to "IfcElementType"
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcWallType"
+    And I press "bim.assign_class"
+    And the variable "type" is "{ifc}.by_type('IfcWallType')[0].id()"
+    And I press "bim.assign_type(relating_type={type}, related_object='IfcWall/Cube')"
+    And I press "bim.assign_type(relating_type={type}, related_object='IfcWall/Cube.001')"
+    When the object "IfcWall/Cube" is selected
+    And I press "bim.select_similar_type"
+    Then the object "IfcWall/Cube" is selected
+    And the object "IfcWall/Cube.001" is selected