diff --git a/homeassistant/components/econet/water_heater.py b/homeassistant/components/econet/water_heater.py
index f93ad7f8872..876d9270bc9 100644
--- a/homeassistant/components/econet/water_heater.py
+++ b/homeassistant/components/econet/water_heater.py
@@ -136,12 +136,12 @@ class EcoNetWaterHeater(EcoNetEntity[WaterHeater], WaterHeaterEntity):
         return self.water_heater.set_point
 
     @property
-    def min_temp(self):
+    def min_temp(self) -> float:
         """Return the minimum temperature."""
         return self.water_heater.set_point_limits[0]
 
     @property
-    def max_temp(self):
+    def max_temp(self) -> float:
         """Return the maximum temperature."""
         return self.water_heater.set_point_limits[1]