diff --git a/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/CustomUnits.java b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/CustomUnits.java
new file mode 100644
index 000000000..21349cd4a
--- /dev/null
+++ b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/CustomUnits.java
@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2014,2019 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.eclipse.smarthome.core.library.unit;
+
+import tec.uom.se.AbstractSystemOfUnits;
+
+/**
+ * Base class for all custom unit classes added in openHAB.
+ *
+ * @author Hilbrand Bouwkamp - initial contribution
+ */
+class CustomUnits extends AbstractSystemOfUnits {
+
+    @Override
+    public String getName() {
+        return getClass().getSimpleName();
+    }
+
+}
diff --git a/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/ImperialUnits.java b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/ImperialUnits.java
index d59acb4ce..87e445d7e 100644
--- a/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/ImperialUnits.java
+++ b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/ImperialUnits.java
@@ -23,7 +23,6 @@ import javax.measure.spi.SystemOfUnits;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
 
-import tec.uom.se.AbstractSystemOfUnits;
 import tec.uom.se.format.SimpleUnitFormat;
 import tec.uom.se.function.AddConverter;
 import tec.uom.se.function.MultiplyConverter;
@@ -39,7 +38,7 @@ import tec.uom.se.unit.Units;
  *
  */
 @NonNullByDefault
-public final class ImperialUnits extends AbstractSystemOfUnits {
+public final class ImperialUnits extends CustomUnits {
 
     private static final ImperialUnits INSTANCE = new ImperialUnits();
 
@@ -99,11 +98,6 @@ public final class ImperialUnits extends AbstractSystemOfUnits {
         // avoid external instantiation
     }
 
-    @Override
-    public String getName() {
-        return ImperialUnits.class.getSimpleName();
-    }
-
     /**
      * Returns the unique instance of this class.
      *
diff --git a/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SIUnits.java b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SIUnits.java
index 3dbfdd20a..9eb7eba75 100644
--- a/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SIUnits.java
+++ b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SIUnits.java
@@ -24,7 +24,6 @@ import javax.measure.spi.SystemOfUnits;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
 
-import tec.uom.se.AbstractSystemOfUnits;
 import tec.uom.se.format.SimpleUnitFormat;
 import tec.uom.se.unit.Units;
 
@@ -36,7 +35,7 @@ import tec.uom.se.unit.Units;
  *
  */
 @NonNullByDefault
-public final class SIUnits extends AbstractSystemOfUnits {
+public final class SIUnits extends CustomUnits {
 
     private static final SIUnits INSTANCE = new SIUnits();
 
@@ -49,13 +48,13 @@ public final class SIUnits extends AbstractSystemOfUnits {
     public static final Unit<Volume> CUBIC_METRE = addUnit(Units.CUBIC_METRE);
     public static final Unit<Pressure> PASCAL = addUnit(Units.PASCAL);
 
-    private SIUnits() {
-        // avoid external instantiation
+    static {
+        // Override the default unit symbol ℃ to better support TTS and UIs:
+        SimpleUnitFormat.getInstance().label(CELSIUS, "°C");
     }
 
-    @Override
-    public String getName() {
-        return this.getClass().getSimpleName();
+    private SIUnits() {
+        // avoid external instantiation
     }
 
     /**
@@ -77,9 +76,4 @@ public final class SIUnits extends AbstractSystemOfUnits {
         INSTANCE.units.add(unit);
         return unit;
     }
-
-    static {
-        // Override the default unit symbol ℃ to better support TTS and UIs:
-        SimpleUnitFormat.getInstance().label(CELSIUS, "°C");
-    }
 }
diff --git a/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SmartHomeUnits.java b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SmartHomeUnits.java
index 159c8dea2..4e7677eb3 100644
--- a/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SmartHomeUnits.java
+++ b/bundles/org.openhab.core/src/main/java/org/eclipse/smarthome/core/library/unit/SmartHomeUnits.java
@@ -53,7 +53,6 @@ import org.eclipse.smarthome.core.library.dimension.Density;
 import org.eclipse.smarthome.core.library.dimension.Intensity;
 import org.eclipse.smarthome.core.library.dimension.VolumetricFlowRate;
 
-import tec.uom.se.AbstractSystemOfUnits;
 import tec.uom.se.AbstractUnit;
 import tec.uom.se.format.SimpleUnitFormat;
 import tec.uom.se.function.ExpConverter;
@@ -75,7 +74,7 @@ import tec.uom.se.unit.Units;
  *
  */
 @NonNullByDefault
-public final class SmartHomeUnits extends AbstractSystemOfUnits {
+public final class SmartHomeUnits extends CustomUnits {
 
     private static final SmartHomeUnits INSTANCE = new SmartHomeUnits();
 
@@ -198,11 +197,6 @@ public final class SmartHomeUnits extends AbstractSystemOfUnits {
         // avoid external instantiation
     }
 
-    @Override
-    public String getName() {
-        return SmartHomeUnits.class.getSimpleName();
-    }
-
     /**
      * Returns the unique instance of this class.
      *