diff --git a/.idea/Model.iml b/.idea/Model.iml
index e1ca1b70..c6561970 100644
--- a/.idea/Model.iml
+++ b/.idea/Model.iml
@@ -7,7 +7,7 @@
       <sourceFolder url="file://$MODULE_DIR$/open_uprn" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/recommendations" isTestSource="false" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.9 (Stonewater Map App)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Fastapi-backend" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index b1ee5ffa..50cad4ca 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -3,7 +3,7 @@
   <component name="Black">
     <option name="sdkName" value="Python 3.10 (backend)" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.9 (Stonewater Map App)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Fastapi-backend" project-jdk-type="Python SDK" />
   <component name="PyCharmProfessionalAdvertiser">
     <option name="shown" value="true" />
   </component>
diff --git a/recommendations/optimiser/optimiser_functions.py b/recommendations/optimiser/optimiser_functions.py
index a5cbf90d..6fd70c20 100644
--- a/recommendations/optimiser/optimiser_functions.py
+++ b/recommendations/optimiser/optimiser_functions.py
@@ -306,7 +306,6 @@ def add_best_practice_measures(
     solution: List[Dict[str, Any]],
     recommendations: Dict[int, List[List[Dict[str, Any]]]],
     selected: Set[str],
-    needs_ventilation: bool
 ):
     """
     Ensures best-practice measures like ventilation and trickle vents are included
@@ -327,8 +326,6 @@ def add_best_practice_measures(
         All recommendations for all properties, keyed by property id.
     selected : set
         Set of already selected recommendation IDs.
-    needs_ventilation : bool
-        Whether the property requires mechanical ventilation to accompany certain measures.
 
     Returns
     -------
@@ -338,7 +335,13 @@ def add_best_practice_measures(
     # Check if any selected measure requires ventilation
     ventilation_selected = [r for r in solution if "+mechanical_ventilation" in r["type"]]
 
-    if needs_ventilation:
+    # If ventilation has been selected, or one of the measures needs ventilation, we need to ensure ventilation is
+    # included
+    measures_selected_needing_ventilation = any(
+        x in [r["type"] for r in solution] for x in assumptions.measures_needing_ventilation
+    )
+
+    if measures_selected_needing_ventilation or len(ventilation_selected) > 0:
         ventilation_rec = next(
             (r[0] for r in recommendations[property_id] if r[0]["type"] == "mechanical_ventilation"),
             None
diff --git a/recommendations/tests/test_optimiser_functions.py b/recommendations/tests/test_optimiser_functions.py
index 08541c21..0a31ae2c 100644
--- a/recommendations/tests/test_optimiser_functions.py
+++ b/recommendations/tests/test_optimiser_functions.py
@@ -155,7 +155,7 @@ class TestAddBestPracticeMeasures:
         }
         selected = set()
         updated = optimiser_functions.add_best_practice_measures(
-            property_id, solution, recommendations, selected, True
+            property_id, solution, recommendations, selected
         )
         assert "vent1" in updated
         assert "trickle1" in updated
@@ -286,7 +286,7 @@ class TestIncreasingEpcE2e:
         total_optimised_gain = sum(m["gain"] for m in solution)
         assert total_optimised_gain == 17.6, "Total gain of optimised measures should meet or exceed target gain"
 
-        selected = optimiser_functions.add_best_practice_measures(p.id, solution, recommendations, selected, False)
+        selected = optimiser_functions.add_best_practice_measures(p.id, solution, recommendations, selected)
 
         # Flatten recommendations for output
         flattened = optimiser_functions.flatten_recommendations_with_defaults(p.id, recommendations, selected)