diff --git a/components/daikin_s21/climate/daikin_s21_climate.cpp b/components/daikin_s21/climate/daikin_s21_climate.cpp
index cc3cc30..cb59767 100644
--- a/components/daikin_s21/climate/daikin_s21_climate.cpp
+++ b/components/daikin_s21/climate/daikin_s21_climate.cpp
@@ -54,7 +54,7 @@ climate::ClimateTraits DaikinS21Climate::traits() {
        climate::CLIMATE_MODE_COOL, climate::CLIMATE_MODE_HEAT,
        climate::CLIMATE_MODE_FAN_ONLY, climate::CLIMATE_MODE_DRY});
 
-  traits.set_supported_custom_fan_modes({"Automatic", "1", "2", "3", "4", "5"});
+  traits.set_supported_custom_fan_modes({"Automatic", "Silent", "1", "2", "3", "4", "5"});
 
   traits.set_supported_swing_modes({
       climate::CLIMATE_SWING_OFF,
@@ -232,6 +232,8 @@ const std::string DaikinS21Climate::d2e_fan_mode(DaikinFanMode mode) {
       return "4";
     case DaikinFanMode::Speed5:
       return "5";
+    case DaikinFanMode::Silent:
+      return "Silent";
     case DaikinFanMode::Auto:
     default:
       return "Automatic";
@@ -241,6 +243,8 @@ const std::string DaikinS21Climate::d2e_fan_mode(DaikinFanMode mode) {
 DaikinFanMode DaikinS21Climate::e2d_fan_mode(std::string mode) {
   if (mode == "Automatic")
     return DaikinFanMode::Auto;
+  if (mode == "Silent")
+    return DaikinFanMode::Silent;
   if (mode == "1")
     return DaikinFanMode::Speed1;
   if (mode == "2")
diff --git a/components/daikin_s21/s21.cpp b/components/daikin_s21/s21.cpp
index 0fe50c2..9cf5976 100644
--- a/components/daikin_s21/s21.cpp
+++ b/components/daikin_s21/s21.cpp
@@ -37,6 +37,8 @@ std::string daikin_fan_mode_to_string(DaikinFanMode mode) {
   switch (mode) {
     case DaikinFanMode::Auto:
       return "Auto";
+    case DaikinFanMode::Silent:
+      return "Silent";
     case DaikinFanMode::Speed1:
       return "1";
     case DaikinFanMode::Speed2:
diff --git a/components/daikin_s21/s21.h b/components/daikin_s21/s21.h
index a725622..9004f96 100644
--- a/components/daikin_s21/s21.h
+++ b/components/daikin_s21/s21.h
@@ -17,6 +17,7 @@ enum class DaikinClimateMode : uint8_t {
 
 enum class DaikinFanMode : uint8_t {
   Auto = 'A',
+  Silent = 'B',
   Speed1 = '3',
   Speed2 = '4',
   Speed3 = '5',