diff --git a/src/vaillant/08.hmu.HW5103.tsp b/src/vaillant/08.hmu.HW5103.tsp
index 4eaad730..c5afa23a 100644
--- a/src/vaillant/08.hmu.HW5103.tsp
+++ b/src/vaillant/08.hmu.HW5103.tsp
@@ -39,6 +39,36 @@ namespace Hmu_HW5103 {
     ign: IGN;
   }
 
+  /** *w for controlling the heat pump */
+  @write
+  @base(MF, 0x1a, 0x6, 0xff, 0x32)
+  model w_2 {
+  }
+
+  /** room target temperature */
+  @inherit(r_2, w_2)
+  @ext(0x1c)
+  model TargetTempHc {
+    // note that this only works without a VRC regulator in the system
+    value: temp;
+  }
+
+  /** cylinder target temperature */
+  @inherit(r_2, w_2)
+  @ext(0x7)
+  model TargetTempHwc {
+    // note that this only works without a VRC regulator in the system
+    value: temp;
+  }
+
+  /** start cooling manually */
+  @inherit(r_2, w_2)
+  @ext(0x1d)
+  model ManualCooling {
+    // note that this only works without a VRC regulator in the system
+    value: onoff;
+  }
+
   @inherit(r_2)
   @ext(0)
   model YieldHcDay {
@@ -122,6 +152,34 @@ namespace Hmu_HW5103 {
     value: UIN;
   }
 
+  /** operating hours */
+  @inherit(r_2)
+  @ext(0x40)
+  model Hours {
+    value: hoursum;
+  }
+
+  /** operating hours heating */
+  @inherit(r_2)
+  @ext(0x41)
+  model HoursHc {
+    value: hoursum;
+  }
+
+  /** operating hours cooling */
+  @inherit(r_2)
+  @ext(0x43)
+  model HoursCool {
+    value: hoursum;
+  }
+
+  /** operating hours hot water */
+  @inherit(r_2)
+  @ext(0x44)
+  model HoursHwc {
+    value: hoursum;
+  }
+
   @inherit(r_2)
   @ext(0x1e)
   model CompressorBlocktime {
@@ -129,9 +187,10 @@ namespace Hmu_HW5103 {
     value: UIN;
   }
 
+  /** target flow temperature */
   @inherit(r_2)
   @ext(0x1f)
-  model SupplyTempWeighted {
+  model TargetFlowTemp {
     value: temp;
   }
 
@@ -175,6 +234,13 @@ namespace Hmu_HW5103 {
     value: percent;
   }
 
+  /** air intake temperature */
+  @inherit(r_2)
+  @ext(0x26)
+  model AirIntakeTemp {
+    value: temp;
+  }
+
   @inherit(r_2)
   @ext(0x2A)
   model YieldCoolingMonth {