diff --git a/src/main/angular/src/app/value/Unit.ts b/src/main/angular/src/app/value/Unit.ts
index cd53798..a44c292 100644
--- a/src/main/angular/src/app/value/Unit.ts
+++ b/src/main/angular/src/app/value/Unit.ts
@@ -28,6 +28,14 @@ export class Unit {
 
   static readonly ILLUMINANCE_LUX = new Unit('ILLUMINANCE_LUX', 'lux');
 
+  static readonly BOOLEAN = new Unit('BOOLEAN', '');
+
+  static readonly DOOR_BOOLEAN = new Unit('DOOR_BOOLEAN', '');
+
+  static readonly WINDOW_BOOLEAN = new Unit('WINDOW_BOOLEAN', '');
+
+  static readonly LIGHT_BOOLEAN = new Unit('LIGHT_BOOLEAN', '');
+
   private constructor(
     readonly name: string,
     readonly unit: string,
diff --git a/src/main/java/de/ph87/data/value/Unit.java b/src/main/java/de/ph87/data/value/Unit.java
index aad3fdc..394dd22 100644
--- a/src/main/java/de/ph87/data/value/Unit.java
+++ b/src/main/java/de/ph87/data/value/Unit.java
@@ -45,6 +45,11 @@ public enum Unit {
   IRRADIATION_KWH_M2("kWh/m²", 1000, IRRADIATION_WH_M2),
 
   PRECIPITATION_MM("mm"),
+
+  BOOLEAN(""),
+  DOOR_BOOLEAN("", 1, BOOLEAN),
+  WINDOW_BOOLEAN("", 1, BOOLEAN),
+  LIGHT_BOOLEAN("", 1, BOOLEAN),
   ;
 
   public final String unit;