diff --git a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
index 6f3d8c624..0b296bd07 100644
--- a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
+++ b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
@@ -3145,6 +3145,18 @@ HWZTC:
   implements:
   - CONTROL
 
+HWBZC:
+  guid: "5e92815b-5fe8-485c-ad47-1749aa085bf6"
+  description: "Heating water valve command on zone side (ZTC)."
+  is_abstract: true
+  opt_uses:
+  - heating_water_valve_status
+  uses:
+  - heating_water_valve_command
+  - zone_air_temperature_sensor
+  - zone_air_temperature_setpoint
+  implements:
+  - CONTROL
 
 HWSWC:
   guid: "9e892876-39ed-40ac-befb-c68d96bbb81b"
diff --git a/ontology/yaml/resources/HVAC/entity_types/UH.yaml b/ontology/yaml/resources/HVAC/entity_types/UH.yaml
index 7db063a21..7e4a1bc26 100644
--- a/ontology/yaml/resources/HVAC/entity_types/UH.yaml
+++ b/ontology/yaml/resources/HVAC/entity_types/UH.yaml
@@ -15,6 +15,13 @@
 ########################
 ### Canonical Types  ###
 ########################
+UH_HWBZC:
+  guid: "49817fa9-042d-4a1f-b715-130423d5d840"
+  description: "Heating water valve with zone temperature control."
+  is_canonical: true
+  implements:
+  - UH
+  - HWBZC
 
 UH_SS_DSP_HWZC:
   guid: "d0df8758-bb8c-492a-b471-7654ddcfcbcc"