diff --git a/.voidbot/state/aetheria.cc b/.voidbot/state/aetheria.cc
index b693bbe53..7150282c1 100644
Binary files a/.voidbot/state/aetheria.cc and b/.voidbot/state/aetheria.cc differ
diff --git a/Assets/Scripts/ServerShared/Entity.cs b/Assets/Scripts/ServerShared/Entity.cs
index 952663500..4744bf3b7 100644
--- a/Assets/Scripts/ServerShared/Entity.cs
+++ b/Assets/Scripts/ServerShared/Entity.cs
@@ -1271,6 +1271,7 @@ public class EquippedItem
     public Shape InsetShape { get; }
     public Entity Entity { get; }
     public EquippableItemData Data { get; }
+    public AetheriaRuntimeCatalogItem RuntimeItem { get; }
 
     public ReactiveProperty<bool> ThermalOnline { get; } = new ReactiveProperty<bool>(false);
     public ReactiveProperty<bool> DurabilityOnline { get; } = new ReactiveProperty<bool>(false);
@@ -1283,6 +1284,7 @@ public class EquippedItem
     public Subject<(uint id, float v)> AudioParameters { get; } = new Subject<(uint id, float v)>();
     public Dictionary<uint, float> AudioParameterValues { get; } = new Dictionary<uint, float>();
 
+    private readonly BezierCurve _thermalPerformanceCurve;
     private float oldTemperature;
     public float Temperature
     {
@@ -1372,9 +1374,10 @@ public class EquippedItem
         Entity = entity;
         EquippableItem = item;
         Position = position;
-        var typedItem = ItemManager.GetRuntimeItem(item);
-        Conductivity = typedItem != null ? (float)typedItem.Conductivity : Data.Conductivity;
-        MaxDurability = typedItem?.Durability > 0 ? (float)typedItem.Durability : Math.Max(item.Durability, 1f);
+        RuntimeItem = ItemManager.GetRuntimeItem(item);
+        Conductivity = RuntimeItem != null ? (float)RuntimeItem.Conductivity : Data.Conductivity;
+        MaxDurability = RuntimeItem?.Durability > 0 ? (float)RuntimeItem.Durability : Math.Max(item.Durability, 1f);
+        _thermalPerformanceCurve = CreateThermalPerformanceCurve(RuntimeItem);
         ThermalExponent = lerp(
             ItemManager.GameplaySettings.ThermalQualityMin,
             ItemManager.GameplaySettings.ThermalQualityMax,
@@ -1443,7 +1446,7 @@ public class EquippedItem
     public void UpdatePerformance()
     {        
         var temp = Temperature;
-        ThermalPerformance = Data.Performance(temp);
+        ThermalPerformance = EvaluateThermalPerformance(temp);
         var deltaTemp = math.abs(temp - oldTemperature);
         DurabilityPerformance = EquippableItem.Durability / MaxDurability;
         var performanceThreshold = Entity.Settings.ShutdownPerformance;
@@ -1457,6 +1460,34 @@ public class EquippedItem
         oldTemperature = temp;
     }
 
+    private float EvaluateThermalPerformance(float temperature)
+    {
+        if (_thermalPerformanceCurve == null ||
+            RuntimeItem == null ||
+            RuntimeItem.MaximumTemperature <= RuntimeItem.MinimumTemperature)
+        {
+            return Data.Performance(temperature);
+        }
+
+        var t = unlerp((float)RuntimeItem.MinimumTemperature, (float)RuntimeItem.MaximumTemperature, temperature);
+        return saturate(_thermalPerformanceCurve.Evaluate(t));
+    }
+
+    private static BezierCurve CreateThermalPerformanceCurve(AetheriaRuntimeCatalogItem item)
+    {
+        if (item?.ThermalPerformanceCurveKeys == null || item.ThermalPerformanceCurveKeys.Count == 0)
+        {
+            return null;
+        }
+
+        return new BezierCurve
+        {
+            Keys = item.ThermalPerformanceCurveKeys
+                .Select(key => new float4((float)key.Time, (float)key.Value, (float)key.InTangent, (float)key.OutTangent))
+                .ToArray()
+        };
+    }
+
     public void Update(float delta)
     {
         foreach (var audioStat in Data.AudioStats)
diff --git a/docs/aetheria-perfect-machine-map.md b/docs/aetheria-perfect-machine-map.md
index e493cac82..1eb82f879 100644
--- a/docs/aetheria-perfect-machine-map.md
+++ b/docs/aetheria-perfect-machine-map.md
@@ -233,10 +233,11 @@ legacy catalog cache, and legacy UI paths should be migration-only or deleted.
   performance stats. `ItemManager.CreateInstance(CraftedItemData, float)`
   initializes new equippable runtime durability from the typed runtime item row;
   `EquippableItemData.Durability` is only an incomplete-row fallback.
-  `EquippedItem` also takes conductivity and max durability from the typed
-  runtime item row for heat conduction, durability performance, and wear
-  scaling; the legacy equippable DTO still owns thermal curve, thermal
-  resilience, and audio-stat residue until those surfaces are imported.
+  `EquippedItem` also takes conductivity, max durability, thermal bounds, and
+  thermal performance curve keys from the typed runtime item row for heat
+  conduction, durability performance, thermal performance, and wear scaling;
+  the legacy equippable DTO still owns thermal resilience and audio-stat
+  residue until those surfaces are imported.
   Inventory drag preview occupancy now projects typed item shape cells only into
   the local `Shape` grid, and final fit/equip acceptance shares the typed
   runtime catalog geometry path in `Entity.ItemFits` and `TryEquip`.
@@ -774,6 +775,9 @@ First Aetheria surfaces to publish:
    - Done: move `EquippedItem` conductivity and max-durability performance/wear
      inputs onto typed runtime item rows; legacy thermal resilience and audio
      stats remain explicit DTO residues.
+   - Done: move `EquippedItem` thermal performance evaluation onto typed
+     runtime item thermal bounds and curve keys; legacy `Data.Performance`
+     remains only as an incomplete-row fallback.
    - Done: import action-bar icon resource paths into typed item definitions and
      move `ActionBarSlot` custom gear icon lookup onto typed runtime item rows.
    - Done: move `Ship` drag, combat/turret predicted shot height, and thruster