diff --git a/infra/grafana/garage_decke.json b/infra/grafana/garage_decke.json
index ccd6784c9..90790babe 100644
--- a/infra/grafana/garage_decke.json
+++ b/infra/grafana/garage_decke.json
@@ -9,7 +9,7 @@
   ],
   "timezone": "browser",
   "schemaVersion": 39,
-  "version": 1,
+  "version": 2,
   "refresh": "30s",
   "panels": [
     {
@@ -365,7 +365,7 @@
         "h": 10,
         "w": 24,
         "x": 0,
-        "y": 4
+        "y": 8
       },
       "datasource": {
         "type": "influxdb",
@@ -448,10 +448,624 @@
           "rawQuery": true
         }
       ]
+    },
+    {
+      "id": 7,
+      "type": "stat",
+      "title": "ΔT Kältedecke (RL − VL)",
+      "description": "Wärmeaufnahme Kältedecke: rl_klimadecke minus vl_kaeltedecke. Höher = mehr Kühlleistung bei Durchfluss.",
+      "gridPos": {
+        "h": 4,
+        "w": 6,
+        "x": 0,
+        "y": 4
+      },
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 2,
+          "color": {
+            "mode": "thresholds",
+            "fixedColor": "green"
+          },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "red",
+                "value": null
+              },
+              {
+                "color": "orange",
+                "value": 0.5
+              },
+              {
+                "color": "yellow",
+                "value": 1.5
+              },
+              {
+                "color": "green",
+                "value": 2.5
+              }
+            ]
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "area",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "RL",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='rl_klimadecke' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "VL",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='vl_kaeltedecke' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "DT",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "$RL - $VL",
+          "hide": false
+        }
+      ]
+    },
+    {
+      "id": 8,
+      "type": "stat",
+      "title": "ΔT Brunnen (RL − VL)",
+      "description": "Temperaturhub Brunnenkreis am PWT: rl_brunnen minus vl_brunnen (nach Umbau Tauchhülse aussagekräftig).",
+      "gridPos": {
+        "h": 4,
+        "w": 6,
+        "x": 6,
+        "y": 4
+      },
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 2,
+          "color": {
+            "mode": "thresholds",
+            "fixedColor": "green"
+          },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "red",
+                "value": null
+              },
+              {
+                "color": "orange",
+                "value": 0.5
+              },
+              {
+                "color": "yellow",
+                "value": 1.5
+              },
+              {
+                "color": "green",
+                "value": 2.5
+              }
+            ]
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "area",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "RL",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='rl_brunnen' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "VL",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='vl_brunnen' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "DT",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "$RL - $VL",
+          "hide": false
+        }
+      ]
+    },
+    {
+      "id": 9,
+      "type": "stat",
+      "title": "Leistung Brunnen",
+      "description": "Q ≈ Durchfluss [l/min] × ΔT [K] × 0,0698 → kW. Durchfluss oben einstellbar (typ. 3–4,5 l/min).",
+      "gridPos": {
+        "h": 4,
+        "w": 6,
+        "x": 12,
+        "y": 4
+      },
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "kwatt",
+          "decimals": 2,
+          "color": {
+            "mode": "thresholds",
+            "fixedColor": "green"
+          },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "blue",
+                "value": null
+              },
+              {
+                "color": "green",
+                "value": 0.5
+              },
+              {
+                "color": "yellow",
+                "value": 2
+              },
+              {
+                "color": "orange",
+                "value": 4
+              }
+            ]
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "area",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "RL",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='rl_brunnen' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "VL",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='vl_brunnen' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "DT",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "$RL - $VL",
+          "hide": true
+        },
+        {
+          "refId": "Q",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "${brunnen_durchfluss} * $DT * 0.0698",
+          "hide": false
+        }
+      ]
+    },
+    {
+      "id": 10,
+      "type": "stat",
+      "title": "PWT ΔT (RL Brunnen − Oberfläche)",
+      "description": "Plausibilitätscheck: Differenz Brunnen-RL zu PWT-Oberfläche. Großer Wert = Fühler/Position noch prüfen.",
+      "gridPos": {
+        "h": 4,
+        "w": 6,
+        "x": 18,
+        "y": 4
+      },
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 1,
+          "color": {
+            "mode": "thresholds",
+            "fixedColor": "green"
+          },
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "red",
+                "value": null
+              },
+              {
+                "color": "orange",
+                "value": 0.5
+              },
+              {
+                "color": "yellow",
+                "value": 1.5
+              },
+              {
+                "color": "green",
+                "value": 2.5
+              }
+            ]
+          }
+        }
+      },
+      "options": {
+        "reduceOptions": {
+          "values": false,
+          "calcs": [
+            "lastNotNull"
+          ]
+        },
+        "orientation": "auto",
+        "textMode": "auto",
+        "colorMode": "background",
+        "graphMode": "area",
+        "justifyMode": "auto"
+      },
+      "targets": [
+        {
+          "refId": "RL",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='rl_brunnen' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "PWT",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT last(\"value\") FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='pwt' AND $timeFilter",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "DT",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "$RL - $PWT",
+          "hide": false
+        }
+      ]
+    },
+    {
+      "id": 11,
+      "type": "timeseries",
+      "title": "ΔT Verlauf (KD + Brunnen)",
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 18
+      },
+      "datasource": {
+        "type": "influxdb",
+        "uid": "ffptl25vzylfke"
+      },
+      "fieldConfig": {
+        "defaults": {
+          "unit": "celsius",
+          "decimals": 2,
+          "custom": {
+            "drawStyle": "line",
+            "lineInterpolation": "linear",
+            "lineWidth": 2,
+            "fillOpacity": 15,
+            "spanNulls": 300000,
+            "showPoints": "never",
+            "axisPlacement": "auto"
+          }
+        },
+        "overrides": [
+          {
+            "matcher": {
+              "id": "byFrameRefID",
+              "options": "DT_KD"
+            },
+            "properties": [
+              {
+                "id": "displayName",
+                "value": "ΔT Kältedecke"
+              }
+            ]
+          },
+          {
+            "matcher": {
+              "id": "byFrameRefID",
+              "options": "DT_BW"
+            },
+            "properties": [
+              {
+                "id": "displayName",
+                "value": "ΔT Brunnen"
+              }
+            ]
+          },
+          {
+            "matcher": {
+              "id": "byFrameRefID",
+              "options": "Q_BW"
+            },
+            "properties": [
+              {
+                "id": "displayName",
+                "value": "Leistung Brunnen"
+              },
+              {
+                "id": "unit",
+                "value": "kwatt"
+              },
+              {
+                "id": "custom.axisPlacement",
+                "value": "right"
+              },
+              {
+                "id": "color",
+                "value": {
+                  "mode": "fixed",
+                  "fixedColor": "purple"
+                }
+              }
+            ]
+          }
+        ]
+      },
+      "options": {
+        "legend": {
+          "displayMode": "table",
+          "placement": "bottom",
+          "calcs": [
+            "last",
+            "mean",
+            "max",
+            "min"
+          ]
+        },
+        "tooltip": {
+          "mode": "multi",
+          "sort": "none"
+        }
+      },
+      "targets": [
+        {
+          "refId": "RL_KD",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") AS \"RL KD\" FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='rl_klimadecke' AND $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "VL_KD",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") AS \"VL KD\" FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='vl_kaeltedecke' AND $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "DT_KD",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "$RL_KD - $VL_KD",
+          "hide": false
+        },
+        {
+          "refId": "RL_BW",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") AS \"RL Brunnen\" FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='rl_brunnen' AND $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "VL_BW",
+          "datasource": {
+            "type": "influxdb",
+            "uid": "ffptl25vzylfke"
+          },
+          "query": "SELECT mean(\"value\") AS \"VL Brunnen\" FROM \"temperature\" WHERE \"node\"='garage_decke' AND \"sensor\"='vl_brunnen' AND $timeFilter GROUP BY time($__interval)",
+          "rawQuery": true,
+          "hide": true
+        },
+        {
+          "refId": "DT_BW",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "$RL_BW - $VL_BW",
+          "hide": false
+        },
+        {
+          "refId": "Q_BW",
+          "datasource": {
+            "type": "__expr__",
+            "uid": "__expr__",
+            "name": "Expression"
+          },
+          "type": "math",
+          "expression": "${brunnen_durchfluss} * $DT_BW * 0.0698",
+          "hide": false
+        }
+      ]
     }
   ],
   "time": {
     "from": "now-6h",
     "to": "now"
+  },
+  "templating": {
+    "list": [
+      {
+        "current": {
+          "selected": true,
+          "text": "3.75",
+          "value": "3.75"
+        },
+        "description": "Brunnen-Volumenstrom in l/min (geschätzt/gemessen, typ. 3–4,5)",
+        "hide": 0,
+        "includeAll": false,
+        "label": "Brunnen l/min",
+        "multi": false,
+        "name": "brunnen_durchfluss",
+        "options": [
+          {
+            "selected": false,
+            "text": "3",
+            "value": "3"
+          },
+          {
+            "selected": false,
+            "text": "3.25",
+            "value": "3.25"
+          },
+          {
+            "selected": false,
+            "text": "3.5",
+            "value": "3.5"
+          },
+          {
+            "selected": true,
+            "text": "3.75",
+            "value": "3.75"
+          },
+          {
+            "selected": false,
+            "text": "4",
+            "value": "4"
+          },
+          {
+            "selected": false,
+            "text": "4.25",
+            "value": "4.25"
+          },
+          {
+            "selected": false,
+            "text": "4.5",
+            "value": "4.5"
+          }
+        ],
+        "query": "3,3.25,3.5,3.75,4,4.25,4.5",
+        "skipUrlSync": false,
+        "type": "custom"
+      }
+    ]
   }
-}
\ No newline at end of file
+}