Index: firmware/App/Modes/ModeGenDialysate.c
===================================================================
diff -u -rb3423232af3c7add435cf58646e8956f99e45ffd -r3ebcff44116a7853d2011c7b2f1eb38c1f37ba2a
--- firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision b3423232af3c7add435cf58646e8956f99e45ffd)
+++ firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 3ebcff44116a7853d2011c7b2f1eb38c1f37ba2a)
@@ -14,7 +14,7 @@
 * @date    (original)  06-Nov-2024
 *
 ***************************************************************************/
-#include "math.h"
+#include "math.h"  // for 'exp'
 
 #include "BalancingChamber.h"
 #include "ConcentratePumps.h"
@@ -63,16 +63,16 @@
 #define LOW_DIAL_FLOW_RATE                              150.0F                                      ///< Dialysate flow rate lesser than 150 considered to be low Qds.
 #define ZERO_DIAL_FLOW_RATE                             0.0F                                        ///< Zero dialysate flow rate
 #define SPENT_CHAMBER_FILL_MAX_COUNT                    10                                          ///< Total number of spent chamber fill allowed.
-#define BICARB_CHAMBER_FILL_TIMEOUT                    ( 1 * MS_PER_SECOND )                        ///< Bicarb chamber fill timeout.
-#define B1B2_HEAT_DIS_FIRST_COEFF                      0.00000000487858F                            ///< First coefficient for Heat loss dissipation calculation from D4 to D28(cubic equation).
-#define B1B2_HEAT_DIS_SEC_COEFF                        0.0000063124F                                ///< Second coefficient for Heat loss dissipation calculation from D4 to D28.
-#define B1B2_HEAT_DIS_THIRD_COEFF                      0.00258513F                                  ///< Third coefficient for Heat loss dissipation calculation from D4 to D28.
-#define B1B2_HEAT_DIS_FOURTH_COEFF                     0.242013F                                    ///< Fourth coefficient for Heat loss dissipation calculation from D4 to D28.
-#define B3_HEAT_DIS_FIRST_COEFF                        0.0000000067756F                             ///< First coefficient for Heat loss dissipation calculation from D28 to Dialyzer(cubic equation).
-#define B3_HEAT_DIS_SEC_COEFF                          0.0000085278F                                ///< Second coefficient for Heat loss dissipation calculation from D28 to Dialyzer.
-#define B3_HEAT_DIS_THIRD_COEFF                        0.0035126F                                   ///< Third coefficient for Heat loss dissipation calculation from D28 to Dialyzer.
-#define B3_HEAT_DIS_FOURTH_COEFF                       0.63893F                                     ///< Fourth coefficient for Heat loss dissipation calculation from D28 to Dialyzer.
 #define BICARB_CHAMBER_FILL_TIMEOUT                     ( 1 * MS_PER_SECOND )                       ///< Bicarb chamber fill timeout.
+#define B1B2_HEAT_DIS_FIRST_COEFF                       0.00000000487858F                           ///< First coefficient for Heat loss dissipation calculation from D4 to D28(cubic equation).
+#define B1B2_HEAT_DIS_SEC_COEFF                         0.0000063124F                               ///< Second coefficient for Heat loss dissipation calculation from D4 to D28.
+#define B1B2_HEAT_DIS_THIRD_COEFF                       0.00258513F                                 ///< Third coefficient for Heat loss dissipation calculation from D4 to D28.
+#define B1B2_HEAT_DIS_FOURTH_COEFF                      0.242013F                                   ///< Fourth coefficient for Heat loss dissipation calculation from D4 to D28.
+#define B3_HEAT_DIS_FIRST_COEFF                         0.0000000067756F                            ///< First coefficient for Heat loss dissipation calculation from D28 to Dialyzer(cubic equation).
+#define B3_HEAT_DIS_SEC_COEFF                           0.0000085278F                               ///< Second coefficient for Heat loss dissipation calculation from D28 to Dialyzer.
+#define B3_HEAT_DIS_THIRD_COEFF                         0.0035126F                                  ///< Third coefficient for Heat loss dissipation calculation from D28 to Dialyzer.
+#define B3_HEAT_DIS_FOURTH_COEFF                        0.63893F                                    ///< Fourth coefficient for Heat loss dissipation calculation from D28 to Dialyzer.
+#define BICARB_CHAMBER_FILL_TIMEOUT                     ( 1 * MS_PER_SECOND )                       ///< Bicarb chamber fill timeout.
 
 //Testing
 #define DELAY_BC_SWITCHING_AT_START_UP          ( 10 * MS_PER_SECOND )                              ///< Provide a balancing chamber switching start up delay to stabilize pump speed etc.,
@@ -598,6 +598,7 @@
     F32 targetTemp              = getTDTargetDialysateTemperature();
     F32 initialTempAtD28        = 0.0F;
     F32 initialTempAtD4         = 0.0F;
+
 #ifndef __REVISED_HEATER_MODEL__
     if ( dialFlowrate >= LOW_DIAL_FLOW_RATE )
     {
@@ -614,6 +615,9 @@
     // Adjust the D4 target temperature
     targetHydChamberFluidTemp.data = getTDTargetDialysateTemperature() + deltaTemp;
 #else
+    // Heat loss model predicts the heat loss ( B1,B2 and B3) in the DD flow path and
+    // finds the delta temperature to be added with the target temperature
+    // to maintain the target temperature at dialyzer.
     //Lets calculate the B1,B2 and B3 heat dissipation factors
     heatDissipation_b3 = calculateHeatDissipationB3();
     heatDissipation_b1b2 = calculateHeatDissipationB1andB2();