diff --git a/homeassistant/components/izone/climate.py b/homeassistant/components/izone/climate.py
index 78fd87b8e2c..3e19afcca26 100644
--- a/homeassistant/components/izone/climate.py
+++ b/homeassistant/components/izone/climate.py
@@ -1,6 +1,7 @@
 """Support for the iZone HVAC."""
 from __future__ import annotations
 
+from collections.abc import Mapping
 import logging
 from typing import Any
 
@@ -246,7 +247,7 @@ class ControllerDevice(ClimateEntity):
                 zone.async_schedule_update_ha_state()
 
     @property
-    def unique_id(self):
+    def unique_id(self) -> str:
         """Return the ID of the controller device."""
         return self._controller.device_uid
 
@@ -256,7 +257,7 @@ class ControllerDevice(ClimateEntity):
         return f"iZone Controller {self._controller.device_uid}"
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> Mapping[str, Any]:
         """Return the optional state attributes."""
         return {
             "supply_temperature": show_temp(
@@ -306,13 +307,13 @@ class ControllerDevice(ClimateEntity):
 
     @property
     @_return_on_connection_error(PRESET_NONE)
-    def preset_mode(self):
+    def preset_mode(self) -> str:
         """Eco mode is external air."""
         return PRESET_ECO if self._controller.free_air else PRESET_NONE
 
     @property
     @_return_on_connection_error([PRESET_NONE])
-    def preset_modes(self):
+    def preset_modes(self) -> list[str]:
         """Available preset modes, normal or eco."""
         if self._controller.free_air_enabled:
             return [PRESET_NONE, PRESET_ECO]
@@ -507,7 +508,7 @@ class ZoneDevice(ClimateEntity):
         return self._controller.available
 
     @property
-    def unique_id(self):
+    def unique_id(self) -> str:
         """Return the ID of the controller device."""
         return f"{self._controller.unique_id}_z{self._zone.index + 1}"
 
@@ -539,29 +540,29 @@ class ZoneDevice(ClimateEntity):
         return list(self._state_to_pizone)
 
     @property
-    def current_temperature(self):
+    def current_temperature(self) -> float:
         """Return the current temperature."""
         return self._zone.temp_current
 
     @property
-    def target_temperature(self):
+    def target_temperature(self) -> float | None:
         """Return the temperature we try to reach."""
         if self._zone.type != Zone.Type.AUTO:
             return None
         return self._zone.temp_setpoint
 
     @property
-    def target_temperature_step(self):
+    def target_temperature_step(self) -> float:
         """Return the supported step of target temperature."""
         return 0.5
 
     @property
-    def min_temp(self):
+    def min_temp(self) -> float:
         """Return the minimum temperature."""
         return self._controller.min_temp
 
     @property
-    def max_temp(self):
+    def max_temp(self) -> float:
         """Return the maximum temperature."""
         return self._controller.max_temp
 
@@ -626,7 +627,7 @@ class ZoneDevice(ClimateEntity):
         return self._zone.index
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> Mapping[str, Any]:
         """Return the optional state attributes."""
         return {
             "airflow_max": self._zone.airflow_max,