diff --git a/homeassistant/components/thermostat/__init__.py b/homeassistant/components/thermostat/__init__.py
index dce742b71a8..17b9a2daca6 100644
--- a/homeassistant/components/thermostat/__init__.py
+++ b/homeassistant/components/thermostat/__init__.py
@@ -34,6 +34,7 @@ STATE_IDLE = "idle"
 
 ATTR_CURRENT_TEMPERATURE = "current_temperature"
 ATTR_AWAY_MODE = "away_mode"
+ATTR_FAN = "fan"
 ATTR_MAX_TEMP = "max_temp"
 ATTR_MIN_TEMP = "min_temp"
 ATTR_TEMPERATURE_LOW = "target_temp_low"
@@ -167,6 +168,10 @@ class ThermostatDevice(Entity):
         if is_away is not None:
             data[ATTR_AWAY_MODE] = STATE_ON if is_away else STATE_OFF
 
+        is_fan_on = self.is_fan_on
+        if is_fan_on is not None:
+            data[ATTR_FAN] = STATE_ON if is_fan_on else STATE_OFF
+
         device_attr = self.device_state_attributes
 
         if device_attr is not None:
@@ -212,6 +217,14 @@ class ThermostatDevice(Entity):
         """
         return None
 
+    @property
+    def is_fan_on(self):
+        """
+        Returns if the fan is on
+        Return None if not available.
+        """
+        return None
+
     def set_temperate(self, temperature):
         """ Set new target temperature. """
         pass
diff --git a/homeassistant/components/thermostat/nest.py b/homeassistant/components/thermostat/nest.py
index 423a3195976..88a7761cb28 100644
--- a/homeassistant/components/thermostat/nest.py
+++ b/homeassistant/components/thermostat/nest.py
@@ -66,7 +66,6 @@ class NestThermostat(ThermostatDevice):
         return {
             "humidity": self.device.humidity,
             "target_humidity": self.device.target_humidity,
-            "fan": self.device.fan,
             "mode": self.device.mode
         }
 
@@ -143,6 +142,11 @@ class NestThermostat(ThermostatDevice):
         """ Turns away off. """
         self.structure.away = False
 
+    @property
+    def is_fan_on(self):
+        """ Returns whether the fan is on """
+        return self.device.fan
+
     @property
     def min_temp(self):
         """ Identifies min_temp in Nest API or defaults if not available. """