diff --git a/aiocomfoconnect/sensors.py b/aiocomfoconnect/sensors.py
index 48a3a05..bf9d91d 100644
--- a/aiocomfoconnect/sensors.py
+++ b/aiocomfoconnect/sensors.py
@@ -8,6 +8,7 @@
 from .util import calculate_airflow_constraints
 
 # Sensors
+SENSOR_AIRFLOW_CONSTRAINTS = 230
 SENSOR_ANALOG_INPUT_1 = 369
 SENSOR_ANALOG_INPUT_2 = 370
 SENSOR_ANALOG_INPUT_3 = 371
@@ -22,6 +23,10 @@
 SENSOR_BYPASS_OVERRIDE = 338
 SENSOR_BYPASS_STATE = 227
 SENSOR_CHANGING_FILTERS = 18
+SENSOR_COMFOFOND_GHE_PRESENT = 419
+SENSOR_COMFOFOND_GHE_STATE = 418
+SENSOR_COMFOFOND_TEMP_GROUND = 417
+SENSOR_COMFOFOND_TEMP_OUTDOOR = 416
 SENSOR_COMFORTCONTROL_MODE = 225
 SENSOR_DAYS_TO_REPLACE_FILTER = 192
 SENSOR_DEVICE_STATE = 16
@@ -69,7 +74,6 @@
 SENSOR_TEMPERATURE_SUPPLY = 221
 SENSOR_UNIT_AIRFLOW = 224
 SENSOR_UNIT_TEMPERATURE = 208
-SENSOR_AIRFLOW_CONSTRAINTS = 230
 
 UNIT_WATT = "W"
 UNIT_KWH = "kWh"
@@ -171,10 +175,10 @@ class Sensor:
     400: Sensor("sensor_400", None, 400, PdoType.TYPE_CN_INT16, lambda x: x / 10),
     401: Sensor("sensor_401", None, 401, PdoType.TYPE_CN_UINT8),
     402: Sensor("sensor_402", None, 402, PdoType.TYPE_CN_BOOL, bool),
-    416: Sensor("sensor_416", None, 416, PdoType.TYPE_CN_INT16, lambda x: x / 10),
-    417: Sensor("sensor_417", None, 417, PdoType.TYPE_CN_INT16, lambda x: x / 10),
-    418: Sensor("sensor_418", None, 418, PdoType.TYPE_CN_UINT8),
-    419: Sensor("sensor_419", None, 419, PdoType.TYPE_CN_BOOL, bool),
+    SENSOR_COMFOFOND_TEMP_OUTDOOR: Sensor("ComfoFond Outdoor Air Temperature", None, 416, PdoType.TYPE_CN_INT16, lambda x: x / 10),
+    SENSOR_COMFOFOND_TEMP_GROUND: Sensor("ComfoFond Ground Temperature", None, 417, PdoType.TYPE_CN_INT16, lambda x: x / 10),
+    SENSOR_COMFOFOND_GHE_STATE: Sensor("ComfoFond GHE State Percentage", None, 418, PdoType.TYPE_CN_UINT8),
+    SENSOR_COMFOFOND_GHE_PRESENT: Sensor("ComfoFond GHE Present", None, 419, PdoType.TYPE_CN_BOOL, bool),
     784: Sensor("sensor_784", None, 784, PdoType.TYPE_CN_UINT8),
     785: Sensor("sensor_785", None, 785, PdoType.TYPE_CN_BOOL),
     802: Sensor("sensor_802", None, 802, PdoType.TYPE_CN_INT16, lambda x: x / 10),
diff --git a/docs/PROTOCOL-PDO.md b/docs/PROTOCOL-PDO.md
index 74ee26a..b195b42 100644
--- a/docs/PROTOCOL-PDO.md
+++ b/docs/PROTOCOL-PDO.md
@@ -119,10 +119,10 @@ Numbers are stored in little endian format.
 | 400  | CN_INT16  |                                                  | 0.0                                                                                                              |
 | 401  | CN_UINT8  |                                                  | 0                                                                                                                |
 | 402  | CN_BOOL   | ?? PostHeaterPresent                             | 0                                                                                                                |
-| 416  | CN_INT16  | ?? Outdoor air temperature                       | -40.0                                                                                                            |
-| 417  | CN_INT16  | ?? GHE Ground temperature                        | 10.0                                                                                                             |
-| 418  | CN_UINT8  | ?? GHE State                                     | 0                                                                                                                |
-| 419  | CN_BOOL   | ?? GHE Present                                   | 0=absent, 1=present                                                                                              |
+| 416  | CN_INT16  | ComfoFond Outdoor Air Temperature                | -40.0                                                                                                            |
+| 417  | CN_INT16  | ComfoFond Ground Temperature                     | 10.0                                                                                                             |
+| 418  | CN_UINT8  | ComfoFond GHE State Percentage                   | 0                                                                                                                |
+| 419  | CN_BOOL   | ComfoFond GHE Present                            | 0=absent, 1=present                                                                                              |
 | 513  | CN_UINT16 |                                                  |                                                                                                                  |
 | 514  | CN_UINT16 |                                                  |                                                                                                                  |
 | 515  | CN_UINT16 |                                                  |                                                                                                                  |