diff --git a/BDNS_Abbreviations_Register.csv b/BDNS_Abbreviations_Register.csv
index a5c33a4..406e385 100644
--- a/BDNS_Abbreviations_Register.csv
+++ b/BDNS_Abbreviations_Register.csv
@@ -324,6 +324,7 @@ heat emitter - trace heating,EHT,,ifcSpaceHeater,NOTDEFINED
 heat emitter - trench heater and cooler,TRHC,,ifcSpaceHeater,NOTDEFINED
 heat emitter - trench heating,TRH,,ifcSpaceHeater,NOTDEFINED
 heat emitter - unit heater,UH,,IfcSpaceHeater,NOTDEFINED
+heat emitter - warm air curtain,WAC,,IfcSpaceHeater,NOTDEFINED
 heat exchanger,HX,HVAC/HX,IfcHeatExchanger,NOTDEFINED
 heat exchanger - cooling plate heat exchanger,CPHX,HVAC/HX,IfcHeatExchanger,PLATE
 heat exchanger - heating plate heat exchanger,HPHX,HVAC/HX,IfcHeatExchanger,PLATE