diff --git a/src/app/components/building-passport/RecommendationCard.tsx b/src/app/components/building-passport/RecommendationCard.tsx
index 1ea341c4..cace8863 100644
--- a/src/app/components/building-passport/RecommendationCard.tsx
+++ b/src/app/components/building-passport/RecommendationCard.tsx
@@ -45,6 +45,8 @@ const TitleMap = {
   wall_insulation: "Wall Insulation",
   floor_insulation: "Floor Insulation",
   roof_insulation: "Roof Insulation",
+  // Cylinder thermostat
+  cylinder_thermostat: "Cylinder Thermostat",
 };
 
 type RecommendationCardProps = {
diff --git a/src/app/components/building-passport/RecommendationContainer.tsx b/src/app/components/building-passport/RecommendationContainer.tsx
index baf14354..951e6af4 100644
--- a/src/app/components/building-passport/RecommendationContainer.tsx
+++ b/src/app/components/building-passport/RecommendationContainer.tsx
@@ -122,6 +122,11 @@ export default function RecommendationContainer({
       (rec: Recommendation) => rec.default
     ) || emptyImpactState;
 
+  const defaultCylinderThermostatRecommendations =
+    categorizedRecommendations.cylinder_thermostat?.find(
+      (rec: Recommendation) => rec.default
+    ) || emptyImpactState;
+
   const [costMap, setCostMap] = useState<RecommendationMetricMap>({
     wall_insulation: defaultWallsRecommendations.estimatedCost || 0,
     floor_insulation: defaultFloorRecommendations.estimatedCost || 0,
@@ -138,6 +143,8 @@ export default function RecommendationContainer({
     heating_control: defaultHeatingControlRecommendations.estimatedCost || 0,
     secondary_heating:
       defaultSecondaryHeatingRecommendations.estimatedCost || 0,
+    cylinder_thermostat:
+      defaultCylinderThermostatRecommendations.estimatedCost || 0,
   });
 
   const [sapMap, setSapMap] = useState<RecommendationMetricMap>({
@@ -154,6 +161,8 @@ export default function RecommendationContainer({
       defaultHotWaterTankRecommendations.sapPoints || 0,
     heating_control: defaultHeatingControlRecommendations.sapPoints || 0,
     secondary_heating: defaultSecondaryHeatingRecommendations.sapPoints || 0,
+    cylinder_thermostat:
+      defaultCylinderThermostatRecommendations.sapPoints || 0,
   });
 
   const [labourDaysMap, setLabourDaysMap] = useState<RecommendationMetricMap>({
@@ -170,6 +179,8 @@ export default function RecommendationContainer({
       defaultHotWaterTankRecommendations.labourDays || 0,
     heating_control: defaultHeatingControlRecommendations.labourDays || 0,
     secondary_heating: defaultSecondaryHeatingRecommendations.labourDays || 0,
+    cylinder_thermostat:
+      defaultCylinderThermostatRecommendations.labourDays || 0,
   });
 
   const [co2SavingsMap, setCo2SavingsMap] = useState<RecommendationMetricMap>({
@@ -191,6 +202,8 @@ export default function RecommendationContainer({
       defaultHeatingControlRecommendations.co2EquivalentSavings || 0,
     secondary_heating:
       defaultSecondaryHeatingRecommendations.co2EquivalentSavings || 0,
+    cylinder_thermostat:
+      defaultCylinderThermostatRecommendations.co2EquivalentSavings || 0,
   });
 
   const [energyCostSavingsMap, setEnergyCostSavingsMap] =
@@ -213,6 +226,8 @@ export default function RecommendationContainer({
         defaultHeatingControlRecommendations.energyCostSavings || 0,
       secondary_heating:
         defaultSecondaryHeatingRecommendations.energyCostSavings || 0,
+      cylinder_thermostat:
+        defaultCylinderThermostatRecommendations.energyCostSavings || 0,
     });
 
   const [kwhSavingsMap, setKwhSavingsMap] = useState<RecommendationMetricMap>({
@@ -229,6 +244,8 @@ export default function RecommendationContainer({
       defaultHotWaterTankRecommendations.kwhSavings || 0,
     heating_control: defaultHeatingControlRecommendations.kwhSavings || 0,
     secondary_heating: defaultSecondaryHeatingRecommendations.kwhSavings || 0,
+    cylinder_thermostat:
+      defaultCylinderThermostatRecommendations.kwhSavings || 0,
   });
 
   const [totalEstimatedCost, setTotalEstimatedCost] = useState(
diff --git a/src/app/db/schema/recommendations.ts b/src/app/db/schema/recommendations.ts
index 56b6ad52..84e7e4e8 100644
--- a/src/app/db/schema/recommendations.ts
+++ b/src/app/db/schema/recommendations.ts
@@ -124,7 +124,8 @@ export type RecommendationType =
   | "heating"
   | "hot_water_tank_insulation"
   | "heating_control"
-  | "secondary_heating";
+  | "secondary_heating"
+  | "cylinder_thermostat";
 
 export type UnnestedRecommendation = {
   quantity: number;
diff --git a/src/types/recommendations.ts b/src/types/recommendations.ts
index db41c2f7..e1139886 100644
--- a/src/types/recommendations.ts
+++ b/src/types/recommendations.ts
@@ -11,4 +11,5 @@ export interface RecommendationMetricMap {
   hot_water_tank_insulation: number;
   heating_control: number;
   secondary_heating: number;
+  cylinder_thermostat: number;
 }