diff --git a/src/OpenThermTask.h b/src/OpenThermTask.h
index 788ad3a..df76f20 100644
--- a/src/OpenThermTask.h
+++ b/src/OpenThermTask.h
@@ -22,8 +22,6 @@ protected:
   bool isInitialized = false;
   unsigned long initializedTime = 0;
   unsigned int initializedMemberIdCode = 0;
-  byte dhwFlowRateMultiplier = 1;
-  byte pressureMultiplier = 1;
   bool pump = true;
   unsigned long lastSuccessResponse = 0;
   unsigned long prevUpdateNonEssentialVars = 0;
@@ -228,8 +226,6 @@ protected:
       this->isInitialized = true;
       this->initializedTime = millis();
       this->initializedMemberIdCode = settings.opentherm.memberIdCode;
-      this->dhwFlowRateMultiplier = 1;
-      this->pressureMultiplier = 1;
       this->initialize();
     }
 
@@ -817,7 +813,7 @@ protected:
     );
 
     if (settings.opentherm.filteringNumValues && fabs(vars.temperatures.outdoor) >= 0.1f) {
-      vars.temperatures.outdoor += (value - vars.temperatures.outdoor) * EXT_SENSORS_FILTER_K;
+      vars.temperatures.outdoor += (value - vars.temperatures.outdoor) * OT_NUM_VALUES_FILTER_K;
       
     } else {
       vars.temperatures.outdoor = value;
@@ -849,7 +845,7 @@ protected:
     );
 
     if (settings.opentherm.filteringNumValues && fabs(vars.temperatures.exhaust) >= 0.1f) {
-      vars.temperatures.exhaust += (value - vars.temperatures.exhaust) * EXT_SENSORS_FILTER_K;
+      vars.temperatures.exhaust += (value - vars.temperatures.exhaust) * OT_NUM_VALUES_FILTER_K;
       
     } else {
       vars.temperatures.exhaust = value;
@@ -881,7 +877,7 @@ protected:
     );
 
     if (settings.opentherm.filteringNumValues && fabs(vars.temperatures.heating) >= 0.1f) {
-      vars.temperatures.heating += (value - vars.temperatures.heating) * EXT_SENSORS_FILTER_K;
+      vars.temperatures.heating += (value - vars.temperatures.heating) * OT_NUM_VALUES_FILTER_K;
 
     } else {
       vars.temperatures.heating = value;
@@ -908,7 +904,7 @@ protected:
     );
 
     if (settings.opentherm.filteringNumValues && fabs(vars.temperatures.heatingReturn) >= 0.1f) {
-      vars.temperatures.heatingReturn += (value - vars.temperatures.heatingReturn) * EXT_SENSORS_FILTER_K;
+      vars.temperatures.heatingReturn += (value - vars.temperatures.heatingReturn) * OT_NUM_VALUES_FILTER_K;
       
     } else {
       vars.temperatures.heatingReturn = value;
@@ -942,7 +938,7 @@ protected:
     );
 
     if (settings.opentherm.filteringNumValues && fabs(vars.temperatures.dhw) >= 0.1f) {
-      vars.temperatures.dhw += (value - vars.temperatures.dhw) * EXT_SENSORS_FILTER_K;
+      vars.temperatures.dhw += (value - vars.temperatures.dhw) * OT_NUM_VALUES_FILTER_K;
       
     } else {
       vars.temperatures.dhw = value;
@@ -963,12 +959,12 @@ protected:
     }
 
     float value = CustomOpenTherm::getFloat(response);
-    if (this->dhwFlowRateMultiplier != 10 && value > convertVolume(16, UnitSystem::METRIC, settings.opentherm.unitSystem)) {
-      this->dhwFlowRateMultiplier = 10;
+    if (value < 0 || value > convertVolume(16, UnitSystem::METRIC, settings.opentherm.unitSystem)) {
+      return false;
     }
 
     vars.sensors.dhwFlowRate = convertVolume(
-      value / this->dhwFlowRateMultiplier,
+      value / settings.opentherm.dhwFlowRateMultiplier,
       settings.opentherm.unitSystem,
       settings.system.unitSystem
     );
@@ -1021,7 +1017,7 @@ protected:
 
     float value = CustomOpenTherm::getFloat(response);
     if (settings.opentherm.filteringNumValues && fabs(vars.sensors.modulation) >= 0.1f) {
-      vars.sensors.modulation += (value - vars.sensors.modulation) * EXT_SENSORS_FILTER_K;
+      vars.sensors.modulation += (value - vars.sensors.modulation) * OT_NUM_VALUES_FILTER_K;
       
     } else {
       vars.sensors.modulation = value;
@@ -1042,18 +1038,18 @@ protected:
     }
 
     float value = CustomOpenTherm::getFloat(response);
-    if (this->pressureMultiplier != 10 && value > convertPressure(5, UnitSystem::METRIC, settings.opentherm.unitSystem)) {
-      this->pressureMultiplier = 10;
+    if (value < 0 || value > convertPressure(5, UnitSystem::METRIC, settings.opentherm.unitSystem)) {
+      return false;
     }
 
     value = convertPressure(
-      value / this->pressureMultiplier,
+      value / settings.opentherm.pressureMultiplier,
       settings.opentherm.unitSystem,
       settings.system.unitSystem
     );
 
     if (settings.opentherm.filteringNumValues && fabs(vars.sensors.pressure) >= 0.1f) {
-      vars.sensors.pressure += (value - vars.sensors.pressure) * EXT_SENSORS_FILTER_K;
+      vars.sensors.pressure += (value - vars.sensors.pressure) * OT_NUM_VALUES_FILTER_K;
       
     } else {
       vars.sensors.pressure = value;
diff --git a/src/Settings.h b/src/Settings.h
index caefec4..8787aaf 100644
--- a/src/Settings.h
+++ b/src/Settings.h
@@ -54,6 +54,8 @@ struct Settings {
     byte faultStateGpio = DEFAULT_OT_FAULT_STATE_GPIO;
     byte invertFaultState = false;
     unsigned int memberIdCode = 0;
+    int8_t pressureMultiplier = 1;
+    int8_t dhwFlowRateMultiplier = 1;
     bool dhwPresent = true;
     bool summerWinterMode = false;
     bool heatingCh2Enabled = true;
diff --git a/src/defines.h b/src/defines.h
index 0c8d158..40f37a1 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -5,6 +5,7 @@
 
 #define EXT_SENSORS_INTERVAL            5000
 #define EXT_SENSORS_FILTER_K            0.15
+#define OT_NUM_VALUES_FILTER_K          0.1
 
 #define CONFIG_URL                      "http://%s/"
 #define SETTINGS_VALID_VALUE            "stvalid" // only 8 chars!
diff --git a/src/utils.h b/src/utils.h
index b9e7466..9dee8f8 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -345,6 +345,8 @@ void settingsToJson(const Settings& src, JsonVariant dst, bool safe = false) {
     dst["opentherm"]["faultStateGpio"] = src.opentherm.faultStateGpio;
     dst["opentherm"]["invertFaultState"] = src.opentherm.invertFaultState;
     dst["opentherm"]["memberIdCode"] = src.opentherm.memberIdCode;
+    dst["opentherm"]["pressureMultiplier"] = roundd(src.opentherm.pressureMultiplier, 2);
+    dst["opentherm"]["dhwFlowRateMultiplier"] = roundd(src.opentherm.dhwFlowRateMultiplier, 2);
     dst["opentherm"]["dhwPresent"] = src.opentherm.dhwPresent;
     dst["opentherm"]["summerWinterMode"] = src.opentherm.summerWinterMode;
     dst["opentherm"]["heatingCh2Enabled"] = src.opentherm.heatingCh2Enabled;
@@ -695,6 +697,24 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
       }
     }
 
+    if (!src["opentherm"]["pressureMultiplier"].isNull()) {
+      float value = src["opentherm"]["pressureMultiplier"].as<float>();
+
+      if (value > 0 && value <= 100 && fabs(value - dst.opentherm.pressureMultiplier) > 0.0001f) {
+        dst.opentherm.pressureMultiplier = roundd(value, 2);
+        changed = true;
+      }
+    }
+
+    if (!src["opentherm"]["dhwFlowRateMultiplier"].isNull()) {
+      float value = src["opentherm"]["dhwFlowRateMultiplier"].as<float>();
+
+      if (value > 0 && value <= 100 && fabs(value - dst.opentherm.dhwFlowRateMultiplier) > 0.0001f) {
+        dst.opentherm.dhwFlowRateMultiplier = roundd(value, 2);
+        changed = true;
+      }
+    }
+
     if (src["opentherm"]["dhwPresent"].is<bool>()) {
       bool value = src["opentherm"]["dhwPresent"].as<bool>();
 
diff --git a/src_data/locales/en.json b/src_data/locales/en.json
index 04405b0..0f754fe 100644
--- a/src_data/locales/en.json
+++ b/src_data/locales/en.json
@@ -261,6 +261,14 @@
         "outGpio": "Out GPIO",
         "ledGpio": "RX LED GPIO",
         "memberIdCode": "Master MemberID code",
+        "pressureMultiplier": {
+          "title": "Coeff. pressure correction",
+          "note": "If the pressure displayed is <b>X10</b> from the real one, set the <b>10</b>."
+        },
+        "dhwFlowRateMultiplier": {
+          "title": "Coeff. DHW flow rate correction",
+          "note": "If the DHW flow rate displayed is <b>X10</b> from the real one, set the <b>10</b>."
+        },
 
         "options": {
           "dhwPresent": "DHW present",
diff --git a/src_data/locales/ru.json b/src_data/locales/ru.json
index 0884611..ba7a578 100644
--- a/src_data/locales/ru.json
+++ b/src_data/locales/ru.json
@@ -261,6 +261,14 @@
         "outGpio": "Выход GPIO",
         "ledGpio": "RX LED GPIO",
         "memberIdCode": "Master MemberID код",
+        "pressureMultiplier": {
+          "title": "Коэфф. коррекции давления",
+          "note": "Если давление отображается <b>Х10</b> от реального, установите значение <b>10</b>."
+        },
+        "dhwFlowRateMultiplier": {
+          "title": "Коэфф. коррекции потока ГВС",
+          "note": "Если поток ГВС отображается <b>Х10</b> от реального, установите значение <b>10</b>."
+        },
 
         "options": {
           "dhwPresent": "Контур ГВС",
diff --git a/src_data/pages/settings.html b/src_data/pages/settings.html
index fdb7356..4cb1cd9 100644
--- a/src_data/pages/settings.html
+++ b/src_data/pages/settings.html
@@ -401,6 +401,20 @@
                 </label>
               </div>
 
+              <div class="grid">
+                <label for="opentherm-pressure-multiplier">
+                  <span data-i18n>settings.ot.pressureMultiplier.title</span>
+                  <input type="number" inputmode="numeric" id="opentherm-pressure-multiplier" name="opentherm[pressureMultiplier]" min="0.1" max="100" step="0.01">
+                  <small data-i18n>settings.ot.pressureMultiplier.note</small>
+                </label>
+
+                <label for="opentherm-dhw-fr-multiplier">
+                  <span data-i18n>settings.ot.dhwFlowRateMultiplier.title</span>
+                  <input type="number" inputmode="numeric" id="opentherm-dhw-fr-multiplier" name="opentherm[dhwFlowRateMultiplier]" min="0.1" max="100" step="0.01">
+                  <small data-i18n>settings.ot.dhwFlowRateMultiplier.note</small>
+                </label>
+              </div>
+
               <fieldset>
                 <legend data-i18n>settings.section.ot.options</legend>
                 <label for="opentherm-dhw-present">
@@ -737,6 +751,8 @@
           setInputValue('#opentherm-fault-state-gpio', data.opentherm.faultStateGpio < 255 ? data.opentherm.faultStateGpio : '');
           setCheckboxValue('#opentherm-invert-fault-state', data.opentherm.invertFaultState);
           setInputValue('#opentherm-member-id-code', data.opentherm.memberIdCode);
+          setInputValue('#opentherm-pressure-multiplier', data.opentherm.pressureMultiplier);
+          setInputValue('#opentherm-dhw-fr-multiplier', data.opentherm.dhwFlowRateMultiplier);
           setCheckboxValue('#opentherm-dhw-present', data.opentherm.dhwPresent);
           setCheckboxValue('#opentherm-sw-mode', data.opentherm.summerWinterMode);
           setCheckboxValue('#opentherm-heating-ch2-enabled', data.opentherm.heatingCh2Enabled);