diff --git a/Boiler_2_Stufig_Mit_Fueler/module.php b/Boiler_2_Stufig_Mit_Fueler/module.php
index d0d449d..49ba864 100644
--- a/Boiler_2_Stufig_Mit_Fueler/module.php
+++ b/Boiler_2_Stufig_Mit_Fueler/module.php
@@ -139,7 +139,7 @@ class Boiler_2_Stufig_Mit_Fueler extends IPSModule
         
             // PT
             $time_constant= $this->ReadPropertyInteger("ZeitKonstante");
-            $delta_t = 30; // Zeitdifferenz zwischen den Messungen (30 Sekunden)
+            $delta_t = 5; // Zeitdifferenz zwischen den Messungen (30 Sekunden)
             $alpha = $delta_t / ($time_constant + $delta_t);
             $newBoilerTemp = $boilerTemp + $alpha * ($boilerPT1 - $boilerTemp);
             $this->SetValue("Boilertemperatur", $newBoilerTemp);
diff --git a/library.json b/library.json
index 47315b1..a4a0cc4 100644
--- a/library.json
+++ b/library.json
@@ -6,7 +6,7 @@
     "compatibility": {
         "version": "7.1"
     },
-    "version": "1.027",
+    "version": "1.028",
     "build": 0,
     "date": 0
 }
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