diff --git a/hotel_node_helper/README.rst b/hotel_node_helper/README.rst
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+=================
+Hotel Node Helper
+=================
+
+This module is for providing helper functions to the hotel node master module.
+
+**Try me on Runbot**
+
+**Known issues / Roadmap**
+
+...
+
+**Bug Tracker**
+
+Bugs are tracked on GitHub Issues. In case of trouble, please check there if your issue has already been reported. If you spotted it first, help us smashing it by providing a detailed and welcomed feedback here.
+
+Credits
+
+Contributors
+
+Maintainer
+
diff --git a/hotel_node_helper/__init__.py b/hotel_node_helper/__init__.py
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+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import models
diff --git a/hotel_node_helper/__manifest__.py b/hotel_node_helper/__manifest__.py
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+{
+    'name': 'Hotel Node Helper',
+    'summary': """Provides helper functions to the hotel node master module""",
+    'version': '0.1.0',
+    'author': 'Pablo Q. Barriuso, \
+               Darío Lodeiros, \
+               Alexandre Díaz, \
+               Odoo Community Association (OCA)',
+    'category': 'Generic Modules/Hotel Management',
+    'depends': [
+        'hotel'
+    ],
+    'license': "AGPL-3",
+    'data': [
+        'security/hotel_node_security.xml',
+        'security/ir.model.access.csv'
+    ],
+    'demo': [],
+    'auto_install': False,
+    'installable': True
+}
diff --git a/hotel_node_helper/models/__init__.py b/hotel_node_helper/models/__init__.py
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+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import inherited_hotel_room_type
diff --git a/hotel_node_helper/models/inherited_hotel_room_type.py b/hotel_node_helper/models/inherited_hotel_room_type.py
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+++ b/hotel_node_helper/models/inherited_hotel_room_type.py
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+# Copyright 2018  Pablo Q. Barriuso
+# Copyright 2018  Alexandre Díaz
+# Copyright 2018  Dario Lodeiros
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+import wdb
+from odoo import models, fields, api
+
+
+class HotelRoomType(models.Model):
+
+    _inherit = 'hotel.room.type'
+
+    @api.model
+    def check_availability_room_ids(self, dfrom, dto,
+                                room_type_id=False, notthis=[]):
+        """
+        Check availability for all or specific room types between dates
+        @return: A list of `ids` with free rooms
+        """
+        free_rooms = super().check_availability_room(dfrom, dto, room_type_id, notthis)
+        return free_rooms.ids
diff --git a/hotel_node_helper/security/hotel_node_security.xml b/hotel_node_helper/security/hotel_node_security.xml
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+++ b/hotel_node_helper/security/hotel_node_security.xml
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+<?xml version="1.0" encoding="utf-8"?>
+<odoo noupdate="0">
+</odoo>
diff --git a/hotel_node_helper/security/ir.model.access.csv b/hotel_node_helper/security/ir.model.access.csv
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+++ b/hotel_node_helper/security/ir.model.access.csv
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+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
diff --git a/hotel_node_helper/static/description/icon.png b/hotel_node_helper/static/description/icon.png
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