diff --git a/docs/USAGE.md b/docs/USAGE.md
index 731159d9..da79204d 100644
--- a/docs/USAGE.md
+++ b/docs/USAGE.md
@@ -390,7 +390,7 @@ Number pm25Item     (fanGroup) { ga="fanPM25" }
 | **Device Type** | [AC_Unit](https://developers.google.com/assistant/smarthome/guides/acunit) |
 | **Supported Traits** | [OnOff](https://developers.google.com/assistant/smarthome/traits/OnOff), [FanSpeed](https://developers.google.com/assistant/smarthome/traits/fanspeed), [TemperatureSetting](https://developers.google.com/assistant/smarthome/traits/temperaturesetting), [Modes](https://developers.google.com/assistant/smarthome/traits/modes),  [SensorState](https://developers.google.com/assistant/smarthome/traits/sensorstate) |
 | **Supported Items** | Group as `AC_Unit` with the following members:<br>(optional) Switch as `fanPower`<br>(optional) Dimmer or Number as `fanSpeed`<br>(optional) Number or String as `fanMode`<br>(optional) Number as `fanFilterLifeTime`<br>(optional) Number as `fanPM25`<br>(optional) Number as `thermostatTemperatureAmbient`<br>(optional) Number as `thermostatTemperatureSetpoint`<br>(optional) Number as `thermostatTemperatureSetpointLow`<br>(optional) Number as `thermostatTemperatureSetpointHigh`<br>(optional) Number as `thermostatHumidityAmbient`<br>(optional) String or Number or Switch as `thermostatMode` |
-| **Configuration** | (optional) `checkState=true/false`<br>(optional) `fanSpeeds="0=away:zero,50=default:standard:one,100=high:two"`<br>(optional) `fanModeName="OperationMode,Modus"`<br>(optional) `fanModeSettings="1=Low:Silent,2=Normal,3=High:Night"`<br>(optional) `useFahrenheit=true/false`<br>(optional) `humidityUnit=percent/float`<br>(optional) `thermostatTemperatureRange="10,30"`<br>(optional) `thermostatModes="off=OFF:WINDOW_OPEN,heat=COMFORT:BOOST,eco=ECO,on=ON,auto"`<br>(optional) `lang="en"`<br>(optional) `ordered=true/false` |
+| **Configuration** | (optional) `checkState=true/false`<br>(optional) `fanSpeeds="0=away:zero,50=default:standard:one,100=high:two"`<br>(optional) `fanModeName="OperationMode,Modus"`<br>(optional) `fanModeSettings="1=Low:Silent,2=Normal,3=High:Night"`<br>(optional) `useFahrenheit=true/false`<br>(optional) `maxHumidity=1-100`<br>(optional) `thermostatTemperatureRange="10,30"`<br>(optional) `thermostatModes="off=OFF:WINDOW_OPEN,heat=COMFORT:BOOST,eco=ECO,on=ON,auto"`<br>(optional) `lang="en"`<br>(optional) `ordered=true/false` |
 
 The AC_Unit device is basically the combination of the Fan and the Thermostat device. For explanation on configuration options please take a look at both of them.
 
@@ -486,7 +486,7 @@ Number { ga="TemperatureSensor" [ useFahrenheit=true, temperatureRange="-20,40"
 | **Device Type** | [Sensor](https://developers.home.google.com/cloud-to-cloud/guides/sensor) |
 | **Supported Traits** | [HumiditySetting](https://developers.home.google.com/cloud-to-cloud/traits/humiditysetting) |
 | **Supported Items** | Number |
-| **Configuration** | (optional) `humidityUnit=percent/float` |
+| **Configuration** | (optional) `maxHumidity=1-100` |
 
 ```shell
 Number { ga="HumiditySensor" }
@@ -499,7 +499,7 @@ Number { ga="HumiditySensor" }
 | **Device Type** | [Sensor](https://developers.home.google.com/cloud-to-cloud/guides/sensor) |
 | **Supported Traits** | [HumiditySetting](https://developers.home.google.com/cloud-to-cloud/traits/humiditysetting), [TemperatureControl](https://developers.home.google.com/cloud-to-cloud/traits/temperaturecontrol), [TemperatureSetting](https://developers.home.google.com/cloud-to-cloud/traits/temperaturesetting) |
 | **Supported Items** | Group as `ClimateSensor` with the following members:<br>(optional) Number as `humidityAmbient`<br>(optional) Number as `temperatureAmbient` |
-| **Configuration** | (optional) `useFahrenheit=true/false`<br>(optional) `humidityUnit=percent/float`<br>(optional) `temperatureRange="-10,50"` |
+| **Configuration** | (optional) `useFahrenheit=true/false`<br>(optional) `maxHumidity=1-100`<br>(optional) `temperatureRange="-10,50"` |
 
 By default, the temperature range of a climate sensor is set to -100 °C to 100 °C.
 The reported state values have to fall into that range!
@@ -518,7 +518,7 @@ Number humidityItem    (sensorGroup) { ga="humidityAmbient" }
 | **Device Type** | [Thermostat](https://developers.home.google.com/cloud-to-cloud/guides/thermostat) |
 | **Supported Traits** | [TemperatureSetting](https://developers.home.google.com/cloud-to-cloud/traits/temperaturesetting) |
 | **Supported Items** | Group as `Thermostat` with the following members<br>(optional) Number as `thermostatTemperatureAmbient`<br>(optional) Number as `thermostatTemperatureSetpoint`<br>(optional) Number as `thermostatTemperatureSetpointLow`<br>(optional) Number as `thermostatTemperatureSetpointHigh`<br>(optional) Number as `thermostatHumidityAmbient`<br>(optional) String or Number or Switch as `thermostatMode` |
-| **Configuration** | (optional) `checkState=true/false`<br>(optional) `useFahrenheit=true/false`<br>(optional) `humidityUnit=percent/float`<br>(optional) `thermostatTemperatureRange="10,30"`<br>(optional) `thermostatModes="off=OFF:WINDOW_OPEN,heat=COMFORT:BOOST,eco=ECO,on=ON,auto"` |
+| **Configuration** | (optional) `checkState=true/false`<br>(optional) `useFahrenheit=true/false`<br>(optional) `maxHumidity=1-100`<br>(optional) `thermostatTemperatureRange="10,30"`<br>(optional) `thermostatModes="off=OFF:WINDOW_OPEN,heat=COMFORT:BOOST,eco=ECO,on=ON,auto"` |
 
 Thermostat requires a group of items to be properly configured to be used with Google Assistant. The default temperature unit is Celsius.
 To change the temperature unit to Fahrenheit, add the config option `useFahrenheit=true` to the thermostat group.
diff --git a/functions/devices/climatesensor.js b/functions/devices/climatesensor.js
index 381a12ef..444954d6 100644
--- a/functions/devices/climatesensor.js
+++ b/functions/devices/climatesensor.js
@@ -72,8 +72,8 @@ class ClimateSensor extends DefaultDevice {
     }
     if ('humidityAmbient' in members) {
       const config = this.getConfig(item);
-      const isPercent = !config.humidityUnit || config.humidityUnit.toLowerCase() === 'percent';
-      const humidity = Math.round(parseFloat(members.humidityAmbient.state) * (isPercent ? 1 : 100));
+      const maxHumidity = (config.maxHumidity && parseInt(config.maxHumidity)) || 100;
+      const humidity = Math.round(parseFloat(members.humidityAmbient.state) * (100 / maxHumidity));
       state.humidityAmbientPercent = humidity;
       state.humiditySetpointPercent = humidity;
     }
diff --git a/functions/devices/humiditysensor.js b/functions/devices/humiditysensor.js
index e007dd57..53efe9ce 100644
--- a/functions/devices/humiditysensor.js
+++ b/functions/devices/humiditysensor.js
@@ -25,8 +25,8 @@ class HumiditySensor extends DefaultDevice {
 
   static getState(item) {
     const config = this.getConfig(item);
-    const isPercent = !config.humidityUnit || config.humidityUnit.toLowerCase() === 'percent';
-    const state = Math.round(parseFloat(item.state) * (isPercent ? 1 : 100));
+    const maxHumidity = (config.maxHumidity && parseInt(config.maxHumidity)) || 100;
+    const state = Math.round(parseFloat(item.state) * (100 / maxHumidity));
     return {
       humidityAmbientPercent: state,
       humiditySetpointPercent: state
diff --git a/functions/devices/thermostat.js b/functions/devices/thermostat.js
index 0666097a..32303639 100644
--- a/functions/devices/thermostat.js
+++ b/functions/devices/thermostat.js
@@ -58,8 +58,8 @@ class Thermostat extends DefaultDevice {
         }
         if (member.indexOf('Humidity') > 0) {
           const config = this.getConfig(item);
-          const isPercent = !config.humidityUnit || config.humidityUnit.toLowerCase() === 'percent';
-          state[member] = Math.round(parseFloat(members[member].state) * (isPercent ? 1 : 100));
+          const maxHumidity = (config.maxHumidity && parseInt(config.maxHumidity)) || 100;
+          state[member] = Math.round(parseFloat(members[member].state) * (100 / maxHumidity));
         }
       }
     }
diff --git a/tests/devices/climatesensor.test.js b/tests/devices/climatesensor.test.js
index 9e4ec232..a9cc735a 100644
--- a/tests/devices/climatesensor.test.js
+++ b/tests/devices/climatesensor.test.js
@@ -226,7 +226,7 @@ describe('ClimateSensor Device', () => {
       metadata: {
         ga: {
           config: {
-            humidityUnit: 'float'
+            maxHumidity: 1
           }
         }
       },
diff --git a/tests/devices/humiditysensor.test.js b/tests/devices/humiditysensor.test.js
index 9e483b5b..eaee42dd 100644
--- a/tests/devices/humiditysensor.test.js
+++ b/tests/devices/humiditysensor.test.js
@@ -37,13 +37,11 @@ describe('HumiditySensor Device', () => {
       });
     });
 
-    test('getState humidityUnit float', () => {
-      expect(Device.getState({ state: '0.34', metadata: { ga: { config: { humidityUnit: 'float' } } } })).toStrictEqual(
-        {
-          humidityAmbientPercent: 34,
-          humiditySetpointPercent: 34
-        }
-      );
+    test('getState maxHumidity', () => {
+      expect(Device.getState({ state: '0.34', metadata: { ga: { config: { maxHumidity: 1 } } } })).toStrictEqual({
+        humidityAmbientPercent: 34,
+        humiditySetpointPercent: 34
+      });
     });
   });
 });
diff --git a/tests/devices/thermostat.test.js b/tests/devices/thermostat.test.js
index dcd81b04..79bb505f 100644
--- a/tests/devices/thermostat.test.js
+++ b/tests/devices/thermostat.test.js
@@ -415,12 +415,12 @@ describe('Thermostat Device', () => {
       });
     });
 
-    test('getState only humdity with unit', () => {
+    test('getState only humdity with maxHumidity', () => {
       const item = {
         metadata: {
           ga: {
             config: {
-              humidityUnit: 'float'
+              maxHumidity: 1
             }
           }
         },