diff --git a/src/property.h b/src/property.h
index 2ebe3bb..12c9686 100644
--- a/src/property.h
+++ b/src/property.h
@@ -134,6 +134,7 @@ struct Property : public detail::Property {
     PROPERTY(KUEHLSYSTEM, 0x0613);
     PROPERTY(DRUCK_HEIZKREIS, 0x064a, Type::et_dec_val);
     PROPERTY(LEISTUNG_AUSLEGUNG_KUEHLEN, 0x0692);
+    PROPERTY(VERDICHTERDREHZAHL, 0x069e);
     PROPERTY(MOTORSTROM, 0x069f);
     PROPERTY(MOTORLEISTUNG, 0x06a0, Type::et_cent_val);
     PROPERTY(MOTORSPANNUNG, 0x06a1);
diff --git a/yaml/thz504.yaml b/yaml/thz504.yaml
index aea517c..81e4518 100644
--- a/yaml/thz504.yaml
+++ b/yaml/thz504.yaml
@@ -8,5 +8,6 @@ packages:
   BASE:   !include { file: wp_base.yaml}
 
   ABLUFT_TAUPUNKT:      !include { file: wp_temperature.yaml, vars: { property: "ABLUFT_TAUPUNKT"  }}
-  DIFFERENZDRUCK:       !include { file: wp_generic.yaml, vars: { property: "DIFFERENZDRUCK", interval: $interval_medium, unit: "Pa", icon: "mdi:air-filter"  }}
-  LAUFZEIT_FILTER_TAGE: !include { file: wp_generic.yaml, vars: { property: "LAUFZEIT_FILTER_TAGE",icon: "mdi:air-filter", unit: "d", interval: $interval_once_in_a_while  }}
+  DIFFERENZDRUCK:       !include { file: wp_generic.yaml, vars: { property: "DIFFERENZDRUCK"      , icon: "mdi:air-filter", unit: "Pa", interval: $interval_medium           }}
+  LAUFZEIT_FILTER_TAGE: !include { file: wp_generic.yaml, vars: { property: "LAUFZEIT_FILTER_TAGE", icon: "mdi:air-filter", unit: "d" , interval: $interval_once_in_a_while  }}
+  VERDICHTERDREHZAHL:   !include { file: wp_generic.yaml, vars: { property: "VERDICHTERDREHZAHL"  , icon: "mdi:gauge"     , unit: "Hz", interval: $interval_medium           }}