Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r561c8ae6df3c144944a2cc5ba2bb4f13ad904972 -r00aab2d131cccd39bfe478cfb4457b5661e9cefc
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 561c8ae6df3c144944a2cc5ba2bb4f13ad904972)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 00aab2d131cccd39bfe478cfb4457b5661e9cefc)
@@ -134,7 +134,7 @@
         heatersStatus[ heater ].dutycycle            = 0.0;
         heatersStatus[ heater ].targetFlow           = 0.0;
         heatersStatus[ heater ].hasTargetTempChanged = FALSE;
-        heatersStatus[ heater ].heaterEfficiency     = 1.0; // Assuming 100% efficiency during initialization until it is updated
+        heatersStatus[ heater ].heaterEstGain        = 1.0; // Assuming 100% efficiency during initialization until it is updated
         heatersStatus[ heater ].hasTargetBeenReached = FALSE;
     }
 
@@ -352,8 +352,8 @@
  *************************************************************************/
 void resetHeatersEfficiency( void )
 {
-    heatersStatus[ DG_PRIMARY_HEATER ].heaterEfficiency = 1.0;
-    heatersStatus[ DG_TRIMMER_HEATER ].heaterEfficiency = 1.0;
+    heatersStatus[ DG_PRIMARY_HEATER ].heaterEstGain = 1.0;
+    heatersStatus[ DG_TRIMMER_HEATER ].heaterEstGain = 1.0;
 }
 
 /*********************************************************************//**
@@ -678,7 +678,7 @@
 static F32 calculateTrimmerHeaterDutyCycle( F32 targetTemperature, F32 currentTemperature, F32 flow, BOOL checkEfficiency )
 {
     // Get the primary heater's efficiency and the last fill temperature from the ModeFill
-    F32 heaterEfficiency = heatersStatus[ DG_TRIMMER_HEATER ].heaterEfficiency;
+    F32 heaterEfficiency = heatersStatus[ DG_TRIMMER_HEATER ].heaterEstGain;
     F32 dutyCycle        = 0.0;
 
 #ifndef _RELEASE_
@@ -791,7 +791,7 @@
         data.trimmerTargetTemp      = heatersStatus[ DG_TRIMMER_HEATER ].targetTemp;
         data.primaryHeaterState     = heatersStatus[ DG_PRIMARY_HEATER ].state;
         data.trimmerHeaterState     = heatersStatus[ DG_TRIMMER_HEATER ].state;
-        data.primaryEfficiency      = heatersStatus[ DG_PRIMARY_HEATER ].heaterEfficiency * 100;
+        data.primaryEfficiency      = heatersStatus[ DG_PRIMARY_HEATER ].heaterEstGain * 100;
         data.primaryCalcTargetTemp  = heatersStatus[ DG_PRIMARY_HEATER ].calculatedTemperature;
         data.trimmerCalcCurrentTemp = heatersStatus[ DG_TRIMMER_HEATER ].calculatedTemperature;