diff --git a/homeassistant/components/flexit_bacnet/binary_sensor.py b/homeassistant/components/flexit_bacnet/binary_sensor.py
index faee803e915..50c49f45e3e 100644
--- a/homeassistant/components/flexit_bacnet/binary_sensor.py
+++ b/homeassistant/components/flexit_bacnet/binary_sensor.py
@@ -47,6 +47,10 @@ async def async_setup_entry(
     )
 
 
+# Coordinator is used to centralize the data updates
+PARALLEL_UPDATES = 0
+
+
 class FlexitBinarySensor(FlexitEntity, BinarySensorEntity):
     """Representation of a Flexit binary Sensor."""
 
diff --git a/homeassistant/components/flexit_bacnet/climate.py b/homeassistant/components/flexit_bacnet/climate.py
index abfa59d0a6d..b9ae16739b9 100644
--- a/homeassistant/components/flexit_bacnet/climate.py
+++ b/homeassistant/components/flexit_bacnet/climate.py
@@ -43,6 +43,9 @@ async def async_setup_entry(
     async_add_entities([FlexitClimateEntity(config_entry.runtime_data)])
 
 
+PARALLEL_UPDATES = 1
+
+
 class FlexitClimateEntity(FlexitEntity, ClimateEntity):
     """Flexit air handling unit."""
 
diff --git a/homeassistant/components/flexit_bacnet/number.py b/homeassistant/components/flexit_bacnet/number.py
index dfcfc193692..061860e7d0d 100644
--- a/homeassistant/components/flexit_bacnet/number.py
+++ b/homeassistant/components/flexit_bacnet/number.py
@@ -205,6 +205,9 @@ async def async_setup_entry(
     )
 
 
+PARALLEL_UPDATES = 1
+
+
 class FlexitNumber(FlexitEntity, NumberEntity):
     """Representation of a Flexit Number."""
 
diff --git a/homeassistant/components/flexit_bacnet/quality_scale.yaml b/homeassistant/components/flexit_bacnet/quality_scale.yaml
index 9b7e4deb4c0..548580f96d3 100644
--- a/homeassistant/components/flexit_bacnet/quality_scale.yaml
+++ b/homeassistant/components/flexit_bacnet/quality_scale.yaml
@@ -47,7 +47,7 @@ rules:
     status: done
     comment: |
       Done implicitly with coordinator.
-  parallel-updates: todo
+  parallel-updates: done
   reauthentication-flow: todo
   test-coverage: todo
   # Gold
diff --git a/homeassistant/components/flexit_bacnet/sensor.py b/homeassistant/components/flexit_bacnet/sensor.py
index 23d8f20da36..0506b13892b 100644
--- a/homeassistant/components/flexit_bacnet/sensor.py
+++ b/homeassistant/components/flexit_bacnet/sensor.py
@@ -161,6 +161,10 @@ async def async_setup_entry(
     )
 
 
+# Coordinator is used to centralize the data updates
+PARALLEL_UPDATES = 0
+
+
 class FlexitSensor(FlexitEntity, SensorEntity):
     """Representation of a Flexit (bacnet) Sensor."""
 
diff --git a/homeassistant/components/flexit_bacnet/switch.py b/homeassistant/components/flexit_bacnet/switch.py
index 283d0e1ec3b..ac69bb86023 100644
--- a/homeassistant/components/flexit_bacnet/switch.py
+++ b/homeassistant/components/flexit_bacnet/switch.py
@@ -68,6 +68,9 @@ async def async_setup_entry(
     )
 
 
+PARALLEL_UPDATES = 1
+
+
 class FlexitSwitch(FlexitEntity, SwitchEntity):
     """Representation of a Flexit Switch."""