diff --git a/app_new/core/models/equipment.py b/app_new/core/models/equipment.py
index efd6a80..8d21570 100644
--- a/app_new/core/models/equipment.py
+++ b/app_new/core/models/equipment.py
@@ -158,6 +158,11 @@ class Equipment(db.Model):
     def curative_count(self):
         """Nombre d'interventions curatives."""
         return len([i for i in self.interventions if i.type == 'curatif'])
+
+    @property
+    def preventive_count(self):
+        """Nombre d'interventions préventives associées à l'équipement."""
+        return len([i for i in self.interventions if i.type == 'preventif'])
     
     @property
     def tree_depth(self):
diff --git a/app_new/equipments/main.py b/app_new/equipments/main.py
index a083cdd..af5124e 100644
--- a/app_new/equipments/main.py
+++ b/app_new/equipments/main.py
@@ -2,6 +2,7 @@
 from flask import Blueprint, render_template, redirect, url_for, request, flash, jsonify
 from flask_login import login_required, current_user
 from datetime import datetime, timezone
+from types import SimpleNamespace
 from app_new.extensions import db
 from ..core.models.equipment import Equipment, EquipmentCategory, EquipmentDocument, EquipmentRoomHistory, EquipmentRestriction, EquipmentQuantityMovement
 from ..core.models.college import Room, Building, RoomType, Zone
@@ -201,6 +202,25 @@ def hierarchy(id):
         .join(Zone, Room.zone_id == Zone.id, isouter=True)
         .order_by(Zone.name, Room.name, descendants.c.name)
     ).all()
+    # Les équipements quantitatifs sans enfants sont eux-mêmes une famille
+    # localisée. La requête des descendants ne retournait alors aucune ligne,
+    # masquant leur salle dans le chargement à la demande.
+    if not rows and not root.is_deleted:
+        room = root.effective_room
+        zone = room.zone if room else None
+        rows = [SimpleNamespace(
+            id=root.id,
+            parent_id=root.parent_id,
+            name=root.name,
+            code=root.code,
+            is_group=root.is_group,
+            status=root.status,
+            quantity=root.quantity,
+            room_id=room.id if room else None,
+            room_name=room.name if room else None,
+            zone_id=zone.id if zone else None,
+            zone_name=zone.name if zone else None,
+        )]
     direct_child_quantities = {}
     for row in rows:
         direct_child_quantities[row.parent_id] = direct_child_quantities.get(row.parent_id, 0) + (row.quantity or 1)