diff --git a/README.md b/README.md
index 42cc080..d2d86f3 100644
--- a/README.md
+++ b/README.md
@@ -722,23 +722,32 @@ Air filter
 - Separate Bits for on/off:
   - `set_Active_Set`: **(control support)** offset and bit set to 1 when switching on S7 type `Bool` **PLC has to set to 0** e.g. `55.1` for `DB4DBX55.1`
   - `set_Active_Reset`: offset and bit set to 1 when switching off S7 type `Bool` **PLC has to set to 0** e.g. `55.2` for `DB4DBX55.2`
-
+- Filter change
+  - `get_FilterChangeIndication`: **(push support)** offset and bit to filter change indication S7 type `Bool` e.g. `55.3` for `DB4DBX55.3`
+    - `0`: filter ok
+    - `true`: change filter
+  - `get_FilterLifeLevel`: **(optional)** **(push support)** offset and bit to filter live level S7 type `bate` e.g. `56` for `DB4DBX56`
+    - `0`: change filter
+    - `100`: filter is new
+  - `set_ResetFilterIndication`: **(optional)** **(control support)** offset and bit to filter change indication S7 type `Bool` **PLC has to set to 0** after detecting change to true via homebridge e.g. `55.4` for `DB4DBX55.4` NOTE: Currently not used by HomeApp
 
 ### <a name='PLC_FilterMaintenance'></a>Light Sensor as `PLC_FilterMaintenance`
-Filter change indication
+Filter change indication (Currently neither supported in HomeApp and HomeBridge)
+
 ![homebridge pic](doc/filtermaintenance.png)
 - `name`: unique name of the accessory
 - `manufacturer`: **(optional)** description
 - `db`: s7 data base number e.g. `4` for `DB4`
 - `enablePolling`: **(optional)** when set to `true` the current state will be polled. It is mandatory as well to enable polling mode on platform level.
 - `pollInterval`: **(optional)** poll interval in seconds. Default value see platform definition.
-- `get_FilterChangeIndication`: **(push support)** offset and bit to filter change indication S7 type `Bool` e.g. `55.3` for `DB4DBX55.3`
-  - `0`: filter ok
-  - `true`: change filter
-- `get_FilterLifeLevel`: **(optional)** **(push support)** offset and bit to filter live level S7 type `bate` e.g. `56` for `DB4DBX56`
-  - `0`: change filter
-  - `100`: filter is new
-- `set_ResetFilterIndication`: **(optional)** **(control support)** offset and bit to filter change indication S7 type `Bool` **PLC has to set to 0** after detecting change to true via homebridge e.g. `55.4` for `DB4DBX55.4` 
+- Filter change
+  - `get_FilterChangeIndication`: **(push support)** offset and bit to filter change indication S7 type `Bool` e.g. `55.3` for `DB4DBX55.3`
+    - `0`: filter ok
+    - `true`: change filter
+  - `get_FilterLifeLevel`: **(optional)** **(push support)** offset and bit to filter live level S7 type `bate` e.g. `56` for `DB4DBX56`
+    - `0`: change filter
+    - `100`: filter is new
+  - `set_ResetFilterIndication`: **(optional)** **(control support)** offset and bit to filter change indication S7 type `Bool` **PLC has to set to 0** after detecting change to true via homebridge e.g. `55.4` for `DB4DBX55.4` NOTE: Currently not used by HomeApp 
 
 
 ## config.json Example
diff --git a/config.schema.json b/config.schema.json
index 74f3d35..1f6f9bd 100644
--- a/config.schema.json
+++ b/config.schema.json
@@ -1598,7 +1598,7 @@
                 "accessories[].set_ResetFilterIndication"
               ],
               "condition": {
-                "functionBody": "return ['PLC_FilterMaintenance'].includes(model.accessories[arrayIndices[0]].accessory);"
+                "functionBody": "return ['PLC_FilterMaintenance','PLC_AirPurifier'].includes(model.accessories[arrayIndices[0]].accessory);"
               }
             },
             {
@@ -1611,7 +1611,7 @@
                 "accessories[].get_FilterLifeLevel"
               ],
               "condition": {
-                "functionBody": "return ['PLC_FilterMaintenance'].includes(model.accessories[arrayIndices[0]].accessory);"
+                "functionBody": "return ['PLC_FilterMaintenance','PLC_AirPurifier'].includes(model.accessories[arrayIndices[0]].accessory);"
               }
             }
           ]
diff --git a/doc/airpurifier.png b/doc/airpurifier.png
new file mode 100644
index 0000000..6150545
Binary files /dev/null and b/doc/airpurifier.png differ
diff --git a/doc/filtermaintenance.png b/doc/filtermaintenance.png
new file mode 100644
index 0000000..a61f84e
Binary files /dev/null and b/doc/filtermaintenance.png differ
diff --git a/index.js b/index.js
index 5c20df1..2b5400f 100644
--- a/index.js
+++ b/index.js
@@ -1496,6 +1496,7 @@ function GenericPLCAccessory(platform, config, accessoryNumber) {
     }
 
     this.initActive(true);
+    this.initFilterMaintainance();
 
     if ('get_RotationSpeed' in config) {
       this.service.getCharacteristic(Characteristic.RotationSpeed)
@@ -1546,33 +1547,8 @@ function GenericPLCAccessory(platform, config, accessoryNumber) {
     this.service = new Service.FilterMaintenance(this.name);
     this.accessory.addService(this.service);
 
-    if ('get_FilterChangeIndication' in this.config) {
-      this.service.getCharacteristic(Characteristic.FilterChangeIndication)
-      .on('get', function(callback) {this.getBit(callback,
-        this.config.db,
-        Math.floor(this.config.get_FilterChangeIndication), Math.floor((this.config.get_FilterChangeIndication*10)%10),
-        'get FilterChangeIndication'
-      );}.bind(this));
-    }
-
-    if ('get_FilterLifeLevel' in config) {
-      this.service.getCharacteristic(Characteristic.FilterLifeLevel)
-      .on('get', function(callback) {this.getByte(callback,
-        config.db,
-        config.get_FilterLifeLevel,
-        "get FilterLifeLevel",
-        this.modFunctionGet
-      );}.bind(this));      
-    }
-
-    if ('set_ResetFilterIndication' in this.config) {
-      this.service.getCharacteristic(Characteristic.ResetFilterIndication)
-      .on('set', function(powerOn, callback) { this.setBit(powerOn, callback,
-        this.config.db,
-        Math.floor(this.config.set_ResetFilterIndication), Math.floor((this.config.set_ResetFilterIndication*10)%10),
-        'set ResetFilterIndication'
-        );}.bind(this));
-    }
+    this.initFilterMaintainance();
+    
   }
 
   // INIT handling ///////////////////////////////////////////////
@@ -1705,6 +1681,36 @@ GenericPLCAccessory.prototype = {
       }
   },
 
+  initFilterMaintainance: function() {
+    if ('get_FilterChangeIndication' in this.config) {
+      this.service.getCharacteristic(Characteristic.FilterChangeIndication)
+      .on('get', function(callback) {this.getBit(callback,
+        this.config.db,
+        Math.floor(this.config.get_FilterChangeIndication), Math.floor((this.config.get_FilterChangeIndication*10)%10),
+        'get FilterChangeIndication'
+      );}.bind(this));
+    }
+
+    if ('get_FilterLifeLevel' in config) {
+      this.service.getCharacteristic(Characteristic.FilterLifeLevel)
+      .on('get', function(callback) {this.getByte(callback,
+        config.db,
+        config.get_FilterLifeLevel,
+        "get FilterLifeLevel",
+        this.modFunctionGet
+      );}.bind(this));      
+    }
+
+    if ('set_ResetFilterIndication' in this.config) {
+      this.service.getCharacteristic(Characteristic.ResetFilterIndication)
+      .on('set', function(powerOn, callback) { this.setBit(powerOn, callback,
+        this.config.db,
+        Math.floor(this.config.set_ResetFilterIndication), Math.floor((this.config.set_ResetFilterIndication*10)%10),
+        'set ResetFilterIndication'
+        );}.bind(this));
+    }
+    },
+
   poll: function() {
     if (this.config.enablePolling || this.config.adaptivePolling) {
       if ((this.pollActive || this.adaptivePollActive  ) && --this.pollCounter <= 0)
@@ -2259,6 +2265,18 @@ GenericPLCAccessory.prototype = {
         this.service.getCharacteristic(Characteristic.SwingMode).updateValue(value);
         rv = true;
       }
+      if ('get_FilterChangeIndication' in this.config && this.config.get_FilterChangeIndication == offset)
+      {
+        this.log.debug( "[" + this.name + "] Push FilterChangeIndication:" + value);
+        this.service.getCharacteristic(Characteristic.FilterChangeIndication).updateValue(value);
+        rv = true;
+      }
+      if ('get_FilterLifeLevel' in this.config && this.config.get_FilterLifeLevel == offset)
+      {
+        this.log.debug( "[" + this.name + "] Push FilterLifeLevel:" + value);
+        this.service.getCharacteristic(Characteristic.FilterLifeLevel).updateValue(value);
+        rv = true;
+      }
     }
     // PUSH handling ///////////////////////////////////////////////
     // FilterMaintenance
@@ -2548,6 +2566,12 @@ GenericPLCAccessory.prototype = {
         this.service.getCharacteristic(Characteristic.SwingMode).setValue(value);
         rv = true;
       }
+      if ('set_ResetFilterIndication' in this.config && this.config.set_ResetFilterIndication == offset)
+      {
+        this.log.debug( "[" + this.name + "] Control ResetFilterIndication:" + value);
+        this.service.getCharacteristic(Characteristic.ResetFilterIndication).setValue(value);
+        rv = true;
+      }
     }
 
     // CONTROL handling ////////////////////////////////////////////
@@ -3041,6 +3065,16 @@ GenericPLCAccessory.prototype = {
           this.service.getCharacteristic(Characteristic.SwingMode).updateValue(value);
         }
       }.bind(this));
+      this.service.getCharacteristic(Characteristic.FilterChangeIndication).getValue(function(err, value) {
+        if (!err) {
+          this.service.getCharacteristic(Characteristic.FilterChangeIndication).updateValue(value);
+        }
+      }.bind(this));
+      this.service.getCharacteristic(Characteristic.FilterLifeLevel).getValue(function(err, value) {
+        if (!err) {
+          this.service.getCharacteristic(Characteristic.FilterLifeLevel).updateValue(value);
+        }
+      }.bind(this));    
     }
     // POLL handling ///////////////////////////////////////////////
     // FilterMaintenance
diff --git a/package.json b/package.json
index a21cf7d..a84c94d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "homebridge-plc",
-  "version": "1.1.0-beta.6",
+  "version": "1.1.0-beta.7",
   "description": "Homebridge plugin for Siemens Step7 and compatible PLCs. (https://github.com/homebridge)",
   "license": "MIT",
   "keywords": [