diff --git a/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml b/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml
index 0326595..d74db10 100644
--- a/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml
+++ b/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml
@@ -41,3 +41,10 @@
           - inventory
       required_endpoint_interfaces:
           - xyz.openbmc_project.Sensor.Value
+    - name: cooled_by
+      description: >
+          Objects that implement Item can optionally implement the
+          'cooled_by' association to provide a link to one or more fans.
+      reverse_name: cooling
+      required_endpoint_interfaces:
+          - xyz.openbmc_project.Inventory.Item.Fan
diff --git a/yaml/xyz/openbmc_project/Inventory/Item/Fan.interface.yaml b/yaml/xyz/openbmc_project/Inventory/Item/Fan.interface.yaml
index 242e91b..2b6ba4b 100644
--- a/yaml/xyz/openbmc_project/Inventory/Item/Fan.interface.yaml
+++ b/yaml/xyz/openbmc_project/Inventory/Item/Fan.interface.yaml
@@ -1,2 +1,11 @@
 description: >
     Implement to provide Fan attributes.
+
+associations:
+    - name: cooling
+      description: >
+          Objects that implement Fan can optionally implement the
+          'cooling' association to provide a link back to a Item.
+      reverse_name: cooled_by
+      required_endpoint_interfaces:
+          - xyz.openbmc_project.Inventory.Item
\ No newline at end of file
diff --git a/yaml/xyz/openbmc_project/Inventory/Item/README.md b/yaml/xyz/openbmc_project/Inventory/Item/README.md
index 5f4fa9e..a801a8f 100644
--- a/yaml/xyz/openbmc_project/Inventory/Item/README.md
+++ b/yaml/xyz/openbmc_project/Inventory/Item/README.md
@@ -19,3 +19,4 @@
 Document ObjectMapper association forward and reverse names as follows:
 * Item and Item: [containing, contained_by]
 * Sensor.Value and Bmc: [monitoring, monitored_by]
+* fan and item: [cooling, cooled_by]