diff --git a/src/ir_Hitachi.cpp b/src/ir_Hitachi.cpp
index bbde07f37..6221d19df 100644
--- a/src/ir_Hitachi.cpp
+++ b/src/ir_Hitachi.cpp
@@ -44,6 +44,7 @@ using irutils::addModeToString;
 using irutils::addFanToString;
 using irutils::addTempToString;
 using irutils::setBit;
+using irutils::setBits;
 
 #if (SEND_HITACHI_AC || SEND_HITACHI_AC2)
 // Send a Hitachi A/C message.
@@ -520,3 +521,222 @@ bool IRrecv::decodeHitachiAc424(decode_results *results, const uint16_t nbits,
   return true;
 }
 #endif  // DECODE_HITACHI_AC424
+
+// Class for handling the remote control on a Hitachi_AC424 53 byte A/C message
+IRHitachiAc424::IRHitachiAc424(const uint16_t pin, const bool inverted,
+                         const bool use_modulation)
+    : _irsend(pin, inverted, use_modulation) { stateReset(); }
+
+// Reset to auto fan, cooling, 23° Celcius
+void IRHitachiAc424::stateReset(void) {
+  for (uint8_t i = 0; i < kHitachiAc424StateLength; i++)
+    remote_state[i] = 0x00;
+
+  remote_state[0]  = 0x01;
+  remote_state[1]  = 0x10;
+  remote_state[3]  = 0x40;
+  remote_state[5]  = 0xFF;
+  remote_state[7]  = 0xCC;
+  remote_state[11] = 0x13;  // Button Action
+  remote_state[33] = 0x80;
+  remote_state[35] = 0x03;
+  remote_state[37] = 0x01;
+  remote_state[39] = 0x88;
+  remote_state[45] = 0xFF;
+  remote_state[47] = 0xFF;
+  remote_state[49] = 0xFF;
+  remote_state[51] = 0xFF;
+
+  setTemp(23);
+  setPower(true);
+  setMode(kHitachiAc424Cool);
+  setFan(kHitachiAc424FanAuto);
+  setInvertedStates();
+}
+
+void IRHitachiAc424::setInvertedStates(void) {
+  for (uint8_t i = 3; i < kHitachiAc424StateLength; i+=2)
+    remote_state[i+1] = ~remote_state[i];
+}
+
+void IRHitachiAc424::begin(void) { _irsend.begin(); }
+
+uint8_t *IRHitachiAc424::getRaw(void) {
+  setInvertedStates();
+  return remote_state;
+}
+
+void IRHitachiAc424::setRaw(const uint8_t new_code[], const uint16_t length) {
+  memcpy(remote_state, new_code, std::min(length, kHitachiAc424StateLength));
+}
+
+#if SEND_HITACHI_AC424
+void IRHitachiAc424::send(const uint16_t repeat) {
+  _irsend.sendHitachiAc424(getRaw(), kHitachiAc424StateLength, repeat);
+}
+#endif  // SEND_HITACHI_AC424
+
+bool IRHitachiAc424::getPower(void) {
+  return GETBIT8(remote_state[27],
+    kHitachiAc424PowerOffset);
+}
+
+void IRHitachiAc424::setPower(const bool on) {
+  setBit(&remote_state[27], kHitachiAc424PowerOffset, on);
+}
+
+void IRHitachiAc424::on(void) { setPower(true); }
+
+void IRHitachiAc424::off(void) { setPower(false); }
+
+uint8_t IRHitachiAc424::getMode(void) {
+  return GETBITS8(remote_state[25], kLowNibble, kNibbleSize);
+}
+
+void IRHitachiAc424::setMode(const uint8_t mode) {
+  uint8_t newMode = mode;
+  switch (mode) {
+    // Fan mode sets a special temp.
+    case kHitachiAc424Fan: setTemp(27, false); break;
+    case kHitachiAc424Heat:
+    case kHitachiAc424Cool:
+    case kHitachiAc424Dry: break;
+    default: newMode = kHitachiAc424Cool;
+  }
+  setBits(&remote_state[25], kLowNibble, kNibbleSize, newMode);
+  if (newMode != kHitachiAc424Fan) setTemp(_previoustemp);
+  setFan(getFan());  // Reset the fan speed after the mode change.
+}
+
+uint8_t IRHitachiAc424::getTemp(void) {
+  return remote_state[13] >> 2;
+}
+
+void IRHitachiAc424::setTemp(const uint8_t celsius, bool setPrevious) {
+  uint8_t temp;
+  if (setPrevious) _previoustemp = celsius;
+  temp = std::min(celsius, kHitachiAc424MaxTemp);
+  temp = std::max(temp, kHitachiAc424MinTemp);
+  remote_state[13] = temp << 2;
+}
+
+uint8_t IRHitachiAc424::getFan(void) {
+  return GETBITS8(remote_state[25], kHighNibble, kNibbleSize);
+}
+
+void IRHitachiAc424::setFan(const uint8_t speed) {
+  uint8_t newSpeed = std::max(speed, kHitachiAc424FanMin);
+  uint8_t fanMax = kHitachiAc424FanMax;
+
+  // Only 2 x low speeds in Dry mode or Auto
+  if (getMode() == kHitachiAc424Dry && speed == kHitachiAc424FanAuto) {
+    fanMax = kHitachiAc424FanAuto;
+  } else if (getMode() == kHitachiAc424Dry) {
+    fanMax = kHitachiAc424FanMaxDry;
+  } else if (getMode() == kHitachiAc424Fan && speed == kHitachiAc424FanAuto) {
+    // Fan Mode does not have auto. Set to safe low
+    newSpeed = kHitachiAc424FanMin;
+  }
+
+  newSpeed = std::min(newSpeed, fanMax);
+  setBits(&remote_state[25], kHighNibble, kNibbleSize, newSpeed);
+  remote_state[9] = 0x92;
+  remote_state[29] = 0x00;
+
+  // When fan is at min/max, additional bytes seem to be set
+  if (newSpeed == kHitachiAc424FanMin) remote_state[9] = 0x98;
+  if (newSpeed == kHitachiAc424FanMax) {
+    remote_state[9] = 0xA9;
+    remote_state[29] = 0x30;
+  }
+}
+
+// Convert a standard A/C mode into its native mode.
+uint8_t IRHitachiAc424::convertMode(const stdAc::opmode_t mode) {
+  switch (mode) {
+    case stdAc::opmode_t::kCool: return kHitachiAc424Cool;
+    case stdAc::opmode_t::kHeat: return kHitachiAc424Heat;
+    case stdAc::opmode_t::kDry:  return kHitachiAc424Dry;
+    case stdAc::opmode_t::kFan:  return kHitachiAc424Fan;
+    default:                     return kHitachiAc424Cool;
+  }
+}
+
+// Convert a standard A/C Fan speed into its native fan speed.
+uint8_t IRHitachiAc424::convertFan(const stdAc::fanspeed_t speed) {
+  switch (speed) {
+    case stdAc::fanspeed_t::kMin:    return kHitachiAc424FanMin;
+    case stdAc::fanspeed_t::kLow:    return kHitachiAc424FanLow;
+    case stdAc::fanspeed_t::kMedium: return kHitachiAc424FanMedium;
+    case stdAc::fanspeed_t::kHigh:   return kHitachiAc424FanHigh;
+    case stdAc::fanspeed_t::kMax:    return kHitachiAc424FanMax;
+    default:                         return kHitachiAc424FanAuto;
+  }
+}
+
+// Convert a native mode to it's common equivalent.
+stdAc::opmode_t IRHitachiAc424::toCommonMode(const uint8_t mode) {
+  switch (mode) {
+    case kHitachiAc424Cool: return stdAc::opmode_t::kCool;
+    case kHitachiAc424Heat: return stdAc::opmode_t::kHeat;
+    case kHitachiAc424Dry:  return stdAc::opmode_t::kDry;
+    case kHitachiAc424Fan:  return stdAc::opmode_t::kFan;
+    default:                return stdAc::opmode_t::kCool;
+  }
+}
+
+// Convert a native fan speed to it's common equivalent.
+stdAc::fanspeed_t IRHitachiAc424::toCommonFanSpeed(const uint8_t speed) {
+  switch (speed) {
+    case kHitachiAc424FanMax:    return stdAc::fanspeed_t::kMax;
+    case kHitachiAc424FanHigh:   return stdAc::fanspeed_t::kHigh;
+    case kHitachiAc424FanMedium: return stdAc::fanspeed_t::kMedium;
+    case kHitachiAc424FanLow:    return stdAc::fanspeed_t::kLow;
+    case kHitachiAc424FanMin:    return stdAc::fanspeed_t::kMin;
+    default:                     return stdAc::fanspeed_t::kAuto;
+  }
+}
+
+// Convert the A/C state to it's common equivalent.
+stdAc::state_t IRHitachiAc424::toCommon(void) {
+  stdAc::state_t result;
+  result.protocol = decode_type_t::HITACHI_AC424;
+  result.model = -1;  // No models used.
+  result.power = this->getPower();
+  result.mode = this->toCommonMode(this->getMode());
+  result.celsius = true;
+  result.degrees = this->getTemp();
+  result.fanspeed = this->toCommonFanSpeed(this->getFan());
+
+  //  todo:
+  result.swingv = stdAc::swingv_t::kOff;
+
+  // Not supported.
+  result.swingh = stdAc::swingh_t::kOff;
+  result.quiet = false;
+  result.turbo = false;
+  result.clean = false;
+  result.econo = false;
+  result.filter = false;
+  result.light = false;
+  result.beep = false;
+  result.sleep = -1;
+  result.clock = -1;
+  return result;
+}
+
+// Convert the internal state into a human readable string.
+String IRHitachiAc424::toString(void) {
+  String result = "";
+  result.reserve(110);  // Reserve some heap for the string to reduce fragging.
+  result += addBoolToString(getPower(), kPowerStr, false);
+  result += addModeToString(getMode(), 0, kHitachiAc424Cool,
+                            kHitachiAc424Heat, kHitachiAc424Dry,
+                            kHitachiAc424Fan);
+  result += addTempToString(getTemp());
+  // Todo: Does not handle max fan, overload method?
+  result += addFanToString(getFan(), kHitachiAc424FanHigh, kHitachiAc424FanLow,
+                           kHitachiAc424FanAuto, kHitachiAc424FanMin,
+                           kHitachiAc424FanMedium);
+  return result;
+}
diff --git a/src/ir_Hitachi.h b/src/ir_Hitachi.h
index 790070a3a..023957ce8 100644
--- a/src/ir_Hitachi.h
+++ b/src/ir_Hitachi.h
@@ -39,6 +39,21 @@ const uint8_t kHitachiAcMaxTemp = 32;   // 32C
 const uint8_t kHitachiAcAutoTemp = 23;  // 23C
 const uint8_t kHitachiAcPowerOffset = 0;
 const uint8_t kHitachiAcSwingOffset = 7;
+// HitachiAc424
+const uint8_t kHitachiAc424Fan = 1;
+const uint8_t kHitachiAc424Cool = 3;
+const uint8_t kHitachiAc424Dry = 5;
+const uint8_t kHitachiAc424Heat = 6;
+const uint8_t kHitachiAc424MinTemp = 16;   // 16C
+const uint8_t kHitachiAc424MaxTemp = 32;   // 32C
+const uint8_t kHitachiAc424FanMin = 1;
+const uint8_t kHitachiAc424FanLow = 2;
+const uint8_t kHitachiAc424FanMedium = 3;
+const uint8_t kHitachiAc424FanHigh = 4;
+const uint8_t kHitachiAc424FanAuto = 5;
+const uint8_t kHitachiAc424FanMax = 6;
+const uint8_t kHitachiAc424FanMaxDry = 2;
+const uint8_t kHitachiAc424PowerOffset = 4;
 
 // Classes
 class IRHitachiAc {
@@ -92,4 +107,47 @@ class IRHitachiAc {
   uint8_t _previoustemp;
 };
 
+class IRHitachiAc424 {
+ public:
+  explicit IRHitachiAc424(const uint16_t pin, const bool inverted = false,
+                       const bool use_modulation = true);
+
+  void stateReset(void);
+#if SEND_HITACHI_AC424
+  void send(const uint16_t repeat = kHitachiAcDefaultRepeat);
+  uint8_t calibrate(void) { return _irsend.calibrate(); }
+#endif  // SEND_HITACHI_AC424
+  void begin(void);
+  void on(void);
+  void off(void);
+  void setPower(const bool on);
+  bool getPower(void);
+  void setTemp(const uint8_t temp, bool setPrevious = true);
+  uint8_t getTemp(void);
+  void setFan(const uint8_t speed);
+  uint8_t getFan(void);
+  void setMode(const uint8_t mode);
+  uint8_t getMode(void);
+  uint8_t* getRaw(void);
+  void setRaw(const uint8_t new_code[],
+              const uint16_t length = kHitachiAc424StateLength);
+  uint8_t convertMode(const stdAc::opmode_t mode);
+  uint8_t convertFan(const stdAc::fanspeed_t speed);
+  static stdAc::opmode_t toCommonMode(const uint8_t mode);
+  static stdAc::fanspeed_t toCommonFanSpeed(const uint8_t speed);
+  stdAc::state_t toCommon(void);
+  String toString(void);
+#ifndef UNIT_TEST
+
+ private:
+  IRsend _irsend;
+#else
+  IRsendTest _irsend;
+#endif
+  // The state of the IR remote in IR code form.
+  uint8_t remote_state[kHitachiAc424StateLength];
+  void setInvertedStates(void);
+  uint8_t _previoustemp;
+};
+
 #endif  // IR_HITACHI_H_
diff --git a/test/ir_Hitachi_test.cpp b/test/ir_Hitachi_test.cpp
index f1d6eec27..d7497160a 100644
--- a/test/ir_Hitachi_test.cpp
+++ b/test/ir_Hitachi_test.cpp
@@ -932,3 +932,162 @@ TEST(TestDecodeHitachiAc424, SyntheticExample) {
   ASSERT_EQ(kHitachiAc424Bits, irsend.capture.bits);
   EXPECT_STATE_EQ(expected, irsend.capture.state, irsend.capture.bits);
 }
+
+// Tests for IRHitachiAc424 class.
+TEST(TestIRHitachiAc424Class, SetInvertedStates) {
+  IRHitachiAc424 ac(0);
+
+  uint8_t raw[kHitachiAc424StateLength] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00};
+  uint8_t expected[kHitachiAc424StateLength] = {
+    0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
+    0xFF, 0x00, 0xFF};
+
+  ac.setRaw(raw);
+  EXPECT_STATE_EQ(expected, ac.getRaw(), kHitachiAc424Bits);
+}
+
+TEST(TestIRHitachiAc424Class, SetAndGetPower) {
+  IRHitachiAc424 ac(0);
+  ac.on();
+  EXPECT_TRUE(ac.getPower());
+  ac.off();
+  EXPECT_FALSE(ac.getPower());
+  ac.setPower(true);
+  EXPECT_TRUE(ac.getPower());
+  ac.setPower(false);
+  EXPECT_FALSE(ac.getPower());
+}
+
+TEST(TestIRHitachiAc424Class, SetAndGetTemp) {
+  IRHitachiAc424 ac(0);
+  ac.setTemp(25);
+  EXPECT_EQ(25, ac.getTemp());
+  ac.setTemp(kHitachiAc424MinTemp);
+  EXPECT_EQ(kHitachiAc424MinTemp, ac.getTemp());
+  ac.setTemp(kHitachiAc424MinTemp - 1);
+  EXPECT_EQ(kHitachiAc424MinTemp, ac.getTemp());
+  ac.setTemp(kHitachiAc424MaxTemp);
+  EXPECT_EQ(kHitachiAc424MaxTemp, ac.getTemp());
+  ac.setTemp(kHitachiAc424MaxTemp + 1);
+  EXPECT_EQ(kHitachiAc424MaxTemp, ac.getTemp());
+}
+
+TEST(TestIRHitachiAc424Class, SetAndGetMode) {
+  IRHitachiAc424 ac(0);
+  ac.setMode(kHitachiAc424Cool);
+  ac.setFan(kHitachiAc424FanAuto);
+  ac.setTemp(25);
+  EXPECT_EQ(25, ac.getTemp());
+  EXPECT_EQ(kHitachiAc424Cool, ac.getMode());
+  EXPECT_EQ(kHitachiAc424FanAuto, ac.getFan());
+  ac.setMode(kHitachiAc424Fan);
+  EXPECT_EQ(kHitachiAc424Fan, ac.getMode());
+  EXPECT_EQ(27, ac.getTemp());
+  EXPECT_NE(kHitachiAc424FanAuto, ac.getFan());
+  ac.setMode(kHitachiAc424Heat);
+  EXPECT_EQ(25, ac.getTemp());
+  EXPECT_EQ(kHitachiAc424Heat, ac.getMode());
+  ac.setMode(kHitachiAc424Dry);
+  EXPECT_EQ(kHitachiAc424Dry, ac.getMode());
+  EXPECT_NE(kHitachiAc424FanAuto, ac.getFan());
+}
+
+TEST(TestIRHitachiAc424Class, SetAndGetFan) {
+  IRHitachiAc424 ac(0);
+  ac.setMode(kHitachiAc424Cool);  // All fan options are available in this mode.
+  ac.setFan(kHitachiAc424FanAuto);
+  EXPECT_EQ(kHitachiAc424FanAuto, ac.getFan());
+  ac.setFan(kHitachiAc424FanLow);
+  EXPECT_EQ(kHitachiAc424FanLow, ac.getFan());
+  ac.setFan(kHitachiAc424FanHigh);
+  EXPECT_EQ(kHitachiAc424FanHigh, ac.getFan());
+  ac.setFan(kHitachiAc424FanMax + 1);
+  EXPECT_EQ(kHitachiAc424FanMax, ac.getFan());
+  ac.setFan(kHitachiAc424FanMin - 1);
+  EXPECT_EQ(kHitachiAc424FanMin, ac.getFan());
+
+  ac.setFan(kHitachiAc424FanAuto);
+  ac.setMode(kHitachiAc424Fan);  // No auto-fan in Fan mode.
+  EXPECT_EQ(kHitachiAc424FanMin, ac.getFan());
+  ac.setFan(kHitachiAc424FanMax);
+  EXPECT_EQ(kHitachiAc424FanMax, ac.getFan());
+
+  // Only min, low and auto fan settings in Dry mode.
+  ac.setMode(kHitachiAc424Dry);
+  EXPECT_EQ(kHitachiAc424FanLow, ac.getFan());
+  ac.setFan(kHitachiAc424FanHigh);
+  EXPECT_EQ(kHitachiAc424FanLow, ac.getFan());
+  ac.setFan(kHitachiAc424FanMin);
+  EXPECT_EQ(kHitachiAc424FanMin, ac.getFan());
+  ac.setFan(kHitachiAc424FanAuto);
+  EXPECT_EQ(kHitachiAc424FanAuto, ac.getFan());
+
+  // Check additional bytes set by min & max fan
+  ac.setMode(kHitachiAc424Cool);
+  ac.setFan(kHitachiAc424FanMax);
+  EXPECT_EQ(ac.getRaw()[9], 0xA9);
+  EXPECT_EQ(ac.getRaw()[29], 0x30);
+  ac.setFan(kHitachiAc424FanMin);
+  EXPECT_EQ(ac.getRaw()[9], 0x98);
+  EXPECT_EQ(ac.getRaw()[29], 0x00);
+  ac.setFan(kHitachiAc424FanLow);
+  EXPECT_EQ(ac.getRaw()[9], 0x92);
+  EXPECT_EQ(ac.getRaw()[29], 0x00);
+}
+
+TEST(TestIRHitachiAc424Class, HumanReadable) {
+  IRHitachiAc424 ac(0);
+
+  ac.setMode(kHitachiAc424Heat);
+  ac.setTemp(kHitachiAc424MaxTemp);
+  ac.on();
+  ac.setFan(kHitachiAc424FanHigh);
+  EXPECT_EQ(
+      "Power: On, Mode: 6 (Heat), Temp: 32C, Fan: 4 (High)",
+      ac.toString());
+  ac.setMode(kHitachiAc424Cool);
+  ac.setTemp(kHitachiAc424MinTemp);
+  ac.setFan(kHitachiAc424FanMin);
+  EXPECT_EQ(
+      "Power: On, Mode: 3 (Cool), Temp: 16C, Fan: 1 (Quiet)",
+      ac.toString());
+}
+
+TEST(TestIRHitachiAcClass424, toCommon) {
+  IRHitachiAc424 ac(0);
+  ac.setPower(true);
+  ac.setMode(kHitachiAc424Cool);
+  ac.setTemp(20);
+  ac.setFan(kHitachiAc424FanMax);
+  // Now test it.
+  ASSERT_EQ(decode_type_t::HITACHI_AC424, ac.toCommon().protocol);
+  ASSERT_EQ(-1, ac.toCommon().model);
+  ASSERT_TRUE(ac.toCommon().power);
+  ASSERT_TRUE(ac.toCommon().celsius);
+  ASSERT_EQ(20, ac.toCommon().degrees);
+  ASSERT_EQ(stdAc::opmode_t::kCool, ac.toCommon().mode);
+  ASSERT_EQ(stdAc::fanspeed_t::kMax, ac.toCommon().fanspeed);
+  // Todo:
+  ASSERT_EQ(stdAc::swingv_t::kOff, ac.toCommon().swingv);
+  // Unsupported.
+  ASSERT_EQ(stdAc::swingh_t::kOff, ac.toCommon().swingh);
+  ASSERT_FALSE(ac.toCommon().turbo);
+  ASSERT_FALSE(ac.toCommon().clean);
+  ASSERT_FALSE(ac.toCommon().light);
+  ASSERT_FALSE(ac.toCommon().quiet);
+  ASSERT_FALSE(ac.toCommon().econo);
+  ASSERT_FALSE(ac.toCommon().filter);
+  ASSERT_FALSE(ac.toCommon().beep);
+  ASSERT_EQ(-1, ac.toCommon().sleep);
+  ASSERT_EQ(-1, ac.toCommon().clock);
+}