developers.home-assistant/docs/core/entity/climate.md

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---
title: Climate entity
sidebar_label: Climate
---
A climate entity controls temperature, humidity, or fans, such as A/C systems and humidifiers. Derive a platform entity from [`homeassistant.components.climate.ClimateEntity`](https://github.com/home-assistant/core/blob/dev/homeassistant/components/climate/__init__.py)
## Properties
:::tip
Properties should always only return information from memory and not do I/O (like network requests). Implement `update()` or `async_update()` to fetch data.
:::
| Name | Type | Default | Description |
| ----------------------- | ----------------------------------- | ------------------------------------ | -------------------------------------------------------------------------- |
| current_humidity | <code>float &#124; None</code> | `None` | The current humidity. |
| current_temperature | <code>float &#124; None</code> | `None` | The current temperature. |
| fan_mode | <code>str &#124; None</code> | **Required by SUPPORT_FAN_MODE** | The current fan mode. |
| fan_modes | <code>list[str] &#124; None</code> | **Required by SUPPORT_FAN_MODE** | The list of available fan modes. |
| hvac_action | <code>HVACAction &#124; None</code> | `None` | The current HVAC action (heating, cooling) |
| hvac_mode | <code>HVACMode &#124; None</code> | **Required** | The current operation (e.g. heat, cool, idle). Used to determine `state`. |
| hvac_modes | <code>list[HVACMode]</code> | **Required** | List of available operation modes. See below. |
| max_humidity | `float` | `DEFAULT_MAX_HUMIDITY` (value == 99) | The maximum humidity. |
| max_temp | `float` | `DEFAULT_MAX_TEMP` (value == 35 °C) | The maximum temperature in `temperature_unit`. |
| min_humidity | `float` | `DEFAULT_MIN_HUMIDITY` (value == 30) | The minimum humidity. |
| min_temp | `float` | `DEFAULT_MIN_TEMP` (value == 7 °C) | The minimum temperature in `temperature_unit`. |
| precision | `float` | According to `temperature_unit` | The precision of the temperature in the system. Defaults to tenths for TEMP_CELSIUS, whole number otherwise. |
| preset_mode | <code>str &#124; None</code> | **Required by SUPPORT_PRESET_MODE** | The current active preset. |
| preset_modes | <code>list[str] &#124; None</code> | **Required by SUPPORT_PRESET_MODE** | The available presets. |
| swing_mode | <code>str &#124; None</code> | **Required by SUPPORT_SWING_MODE** | The swing setting. |
| swing_modes | <code>list[str] &#124; None</code> | **Required by SUPPORT_SWING_MODE** | Returns the list of available swing modes. |
| target_humidity | <code>float &#124; None</code> | `None` | The target humidity the device is trying to reach. |
| target_temperature | <code>float &#124; None</code> | `None` | The temperature currently set to be reached. |
| target_temperature_high | <code>float &#124; None</code> | **Required by TARGET_TEMPERATURE_RANGE** | The upper bound target temperature |
| target_temperature_low | <code>float &#124; None</code> | **Required by TARGET_TEMPERATURE_RANGE** | The lower bound target temperature |
| target_temperature_step | <code>float &#124; None</code> | `None` | The supported step size a target temperature can be increased or decreased |
| temperature_unit | <code>str</code> | **Required** | The unit of temperature measurement for the system (`TEMP_CELSIUS` or `TEMP_FAHRENHEIT`). |
### HVAC modes
You are only allowed to use the built-in HVAC modes, provided by the `HVACMode`
enum. If you want another mode, add a preset instead.
| Name | Description |
| -------------------- | ------------------------------------------------------------------- |
| `HVACMode.OFF` | The device is turned off. |
| `HVACMode.HEAT` | The device is set to heat to a target temperature. |
| `HVACMode.COOL` | The device is set to cool to a target temperature. |
| `HVACMode.HEAT_COOL` | The device is set to heat/cool to a target temperature range. |
| `HVACMode.AUTO` | The device is set to a schedule, learned behavior, AI. |
| `HVACMode.DRY` | The device is set to dry/humidity mode. |
| `HVACMode.FAN_ONLY` | The device only has the fan on. No heating or cooling taking place. |
### HVAC action
The HVAC action describes the _current_ action. This is different from the mode, because if a device is set to heat, and the target temperature is already achieved, the device will not be actively heating anymore. It is only allowed to use the built-in HVAC actions, provided by the `HVACAction` enum.
| Name | Description |
| ----------------------- | --------------------- |
| `HVACAction.OFF` | Device is turned off. |
| `HVACAction.PREHEATING` | Device is preheating. |
| `HVACAction.HEATING` | Device is heating. |
| `HVACAction.COOLING` | Device is cooling. |
| `HVACAction.DRYING` | Device is drying. |
| `HVACAction.FAN` | Device has fan on. |
| `HVACAction.IDLE` | Device is idle. |
| `HVACAction.DEFROSTING` | Device is defrosting. |
### Presets
A device can have different presets that it might want to show to the user. Common presets are "Away" or "Eco". There are a couple of built-in presets that will offer translations, but you're also allowed to add custom presets.
| Name | Description |
| ---------- | ------------------------------------------------------ |
| `NONE` | No preset is active |
| `ECO` | Device is running an energy-saving mode |
| `AWAY` | Device is in away mode |
| `BOOST` | Device turn all valve full up |
| `COMFORT` | Device is in comfort mode |
| `HOME` | Device is in home mode |
| `SLEEP` | Device is prepared for sleep |
| `ACTIVITY` | Device is reacting to activity (e.g. movement sensors) |
### Fan modes
A device's fan can have different states. There are a couple of built-in fan modes, but you're also allowed to use custom fan modes.
| Name |
| ------------- |
| `FAN_ON` |
| `FAN_OFF` |
| `FAN_AUTO` |
| `FAN_LOW` |
| `FAN_MEDIUM` |
| `FAN_HIGH` |
| `FAN_MIDDLE` |
| `FAN_FOCUS` |
| `FAN_DIFFUSE` |
### Swing modes
The device fan can have different swing modes that it wants the user to know about/control.
| Name | Description |
| ------------------ | ------------------------------------------------- |
| `SWING_OFF` | The fan is not swinging. |
| `SWING_ON` | The fan is swinging. |
| `SWING_VERTICAL` | The fan is swinging vertical. |
| `SWING_HORIZONTAL` | The fan is swinging horizontal. |
| `SWING_BOTH` | The fan is swinging both horizontal and vertical. |
## Supported features
Supported features are defined by using values in the `ClimateEntityFeature` enum
and are combined using the bitwise or (`|`) operator.
| Value | Description |
| -------------------------- | ------------------------------------------------------------------------------------------- |
| `TARGET_TEMPERATURE` | The device supports a target temperature. |
| `TARGET_TEMPERATURE_RANGE` | The device supports a ranged target temperature. Used for HVAC modes `heat_cool` and `auto` |
| `TARGET_HUMIDITY` | The device supports a target humidity. |
| `FAN_MODE` | The device supports fan modes. |
| `PRESET_MODE` | The device supports presets. |
| `SWING_MODE` | The device supports swing modes. |
| `TURN_ON` | The device supports turn on. |
| `TURN_OFF` | The device supports turn off. |
## Methods
### Set HVAC mode
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
def set_hvac_mode(self, hvac_mode):
"""Set new target hvac mode."""
async def async_set_hvac_mode(self, hvac_mode):
"""Set new target hvac mode."""
```
### Turn on
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
# The `turn_on` method should set `hvac_mode` to any other than
# `HVACMode.OFF` by optimistically setting it from the service action
# handler or with the next state update
def turn_on(self):
"""Turn the entity on."""
async def async_turn_on(self):
"""Turn the entity on."""
```
### Turn off
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
# The `turn_off` method should set `hvac_mode` to `HVACMode.OFF` by
# optimistically setting it from the service action handler or with the
# next state update
def turn_off(self):
"""Turn the entity off."""
async def async_turn_off(self):
"""Turn the entity off."""
```
### Toggle
```python
class MyClimateEntity(ClimateEntity):
# It's not mandatory to implement the `toggle` method as the base implementation
# will call `turn_on`/`turn_off` according to the current HVAC mode.
# If implemented, the `toggle` method should set `hvac_mode` to the right `HVACMode` by
# optimistically setting it from the service action handler
# or with the next state update.
def toggle(self):
"""Toggle the entity."""
async def async_toggle(self):
"""Toggle the entity."""
```
### Set preset mode
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
def set_preset_mode(self, preset_mode):
"""Set new target preset mode."""
async def async_set_preset_mode(self, preset_mode):
"""Set new target preset mode."""
```
### Set fan mode
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
def set_fan_mode(self, fan_mode):
"""Set new target fan mode."""
async def async_set_fan_mode(self, fan_mode):
"""Set new target fan mode."""
```
### Set humidity
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
def set_humidity(self, humidity):
"""Set new target humidity."""
async def async_set_humidity(self, humidity):
"""Set new target humidity."""
```
### Set swing mode
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
def set_swing_mode(self, swing_mode):
"""Set new target swing operation."""
async def async_set_swing_mode(self, swing_mode):
"""Set new target swing operation."""
```
### Set temperature
:::note
`ClimateEntity` has built-in validation to ensure that the `target_temperature_low` argument is lower than or equal to the `target_temperature_high` argument. Therefore, integrations do not need to validate this in their own implementation.
:::
```python
class MyClimateEntity(ClimateEntity):
# Implement one of these methods.
def set_temperature(self, **kwargs):
"""Set new target temperature."""
async def async_set_temperature(self, **kwargs):
"""Set new target temperature."""
```