diff --git a/homeassistant/components/vesync/common.py b/homeassistant/components/vesync/common.py
index 5a050e042f02cc..08f55a6561dad4 100644
--- a/homeassistant/components/vesync/common.py
+++ b/homeassistant/components/vesync/common.py
@@ -1,6 +1,7 @@
 """Common utilities for VeSync Component."""
 
 import logging
+from typing import TypeGuard
 
 from pyvesync.base_devices import VeSyncHumidifier
 from pyvesync.base_devices.fan_base import VeSyncFanBase
@@ -8,6 +9,7 @@
 from pyvesync.base_devices.outlet_base import VeSyncOutlet
 from pyvesync.base_devices.purifier_base import VeSyncPurifier
 from pyvesync.base_devices.vesyncbasedevice import VeSyncBaseDevice
+from pyvesync.const import ProductTypes
 from pyvesync.devices.vesyncswitch import VeSyncWallSwitch
 
 _LOGGER = logging.getLogger(__name__)
@@ -35,37 +37,39 @@ def rgetattr(obj: object, attr: str) -> object | str | None:
     return obj
 
 
-def is_humidifier(device: VeSyncBaseDevice) -> bool:
+def is_humidifier(device: VeSyncBaseDevice) -> TypeGuard[VeSyncHumidifier]:
     """Check if the device represents a humidifier."""
 
-    return isinstance(device, VeSyncHumidifier)
+    return device.product_type == ProductTypes.HUMIDIFIER
 
 
-def is_fan(device: VeSyncBaseDevice) -> bool:
+def is_fan(device: VeSyncBaseDevice) -> TypeGuard[VeSyncFanBase]:
     """Check if the device represents a fan."""
 
-    return isinstance(device, VeSyncFanBase)
+    return device.product_type == ProductTypes.FAN
 
 
-def is_outlet(device: VeSyncBaseDevice) -> bool:
+def is_outlet(device: VeSyncBaseDevice) -> TypeGuard[VeSyncOutlet]:
     """Check if the device represents an outlet."""
 
-    return isinstance(device, VeSyncOutlet)
+    return device.product_type == ProductTypes.OUTLET
 
 
-def is_wall_switch(device: VeSyncBaseDevice) -> bool:
+def is_wall_switch(device: VeSyncBaseDevice) -> TypeGuard[VeSyncWallSwitch]:
     """Check if the device represents a wall switch, note this doessn't include dimming switches."""
+    if device.product_type != ProductTypes.SWITCH:
+        return False
 
-    return isinstance(device, VeSyncWallSwitch)
+    return getattr(device, "supports_dimmable", False) is False
 
 
-def is_purifier(device: VeSyncBaseDevice) -> bool:
+def is_purifier(device: VeSyncBaseDevice) -> TypeGuard[VeSyncPurifier]:
     """Check if the device represents an air purifier."""
 
-    return isinstance(device, VeSyncPurifier)
+    return device.product_type == ProductTypes.PURIFIER
 
 
-def is_air_fryer(device: VeSyncBaseDevice) -> bool:
+def is_air_fryer(device: VeSyncBaseDevice) -> TypeGuard[VeSyncFryer]:
     """Check if the device represents an air fryer."""
 
-    return isinstance(device, VeSyncFryer)
+    return device.product_type == ProductTypes.AIR_FRYER