diff --git a/src/core/emsdevicevalue.h b/src/core/emsdevicevalue.h
index efa9935f8..83763d947 100644
--- a/src/core/emsdevicevalue.h
+++ b/src/core/emsdevicevalue.h
@@ -158,6 +158,7 @@ class DeviceValue {
     enum DeviceValueNumOp : int8_t {
         DV_NUMOP_NONE   = 0, // default
         DV_NUMOP_DIV2   = 2,
+        DV_NUMOP_DIV4   = 4,
         DV_NUMOP_DIV10  = 10,
         DV_NUMOP_DIV60  = 60,
         DV_NUMOP_DIV100 = 100,
diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index 7446acb2b..e67c10266 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -2595,11 +2595,11 @@ bool Thermostat::set_coolondelay(const char * value, const int8_t id) {
         return false;
     }
 
-    int v;
-    if (!Helpers::value2number(value, v)) {
+    float f;
+    if (!Helpers::value2float(value, f)) {
         return false;
     }
-    write_command(summer2_typeids[hc->hc()], 6, v, summer2_typeids[hc->hc()]);
+    write_command(summer2_typeids[hc->hc()], 6, (uint8_t)(f * 4), summer2_typeids[hc->hc()]);
     return true;
 }
 
@@ -2609,11 +2609,11 @@ bool Thermostat::set_cooloffdelay(const char * value, const int8_t id) {
         return false;
     }
 
-    int v;
-    if (!Helpers::value2number(value, v)) {
+    float f;
+    if (!Helpers::value2float(value, f)) {
         return false;
     }
-    write_command(summer2_typeids[hc->hc()], 7, v, summer2_typeids[hc->hc()]);
+    write_command(summer2_typeids[hc->hc()], 7, (uint8_t)(f * 4), summer2_typeids[hc->hc()]);
     return true;
 }
 
@@ -3491,11 +3491,11 @@ bool Thermostat::set_heatondelay(const char * value, const int8_t id) {
     if (hc == nullptr) {
         return false;
     }
-    int v;
-    if (!Helpers::value2number(value, v)) {
+    float f;
+    if (!Helpers::value2float(value, f)) {
         return false;
     }
-    write_command(summer2_typeids[hc->hc()], 2, (uint8_t)v, summer2_typeids[hc->hc()]);
+    write_command(summer2_typeids[hc->hc()], 2, (uint8_t)(f * 4), summer2_typeids[hc->hc()]);
     return true;
 }
 
@@ -3504,11 +3504,11 @@ bool Thermostat::set_heatoffdelay(const char * value, const int8_t id) {
     if (hc == nullptr) {
         return false;
     }
-    int v;
-    if (!Helpers::value2number(value, v)) {
+    float f;
+    if (!Helpers::value2float(value, f)) {
         return false;
     }
-    write_command(summer2_typeids[hc->hc()], 3, (uint8_t)v, summer2_typeids[hc->hc()]);
+    write_command(summer2_typeids[hc->hc()], 3, (uint8_t)(f * 4), summer2_typeids[hc->hc()]);
     return true;
 }
 
@@ -5012,14 +5012,14 @@ void Thermostat::register_device_values_hc(std::shared_ptr<Thermostat::HeatingCi
                                   101);
             register_device_value(tag, &hc->remotehum, DeviceValueType::CMD, FL_(remotehum), DeviceValueUOM::PERCENT, MAKE_CF_CB(set_remotehum), -1, 101);
         }
-        register_device_value(tag, &hc->heatondelay, DeviceValueType::UINT8, FL_(heatondelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_heatondelay), 1, 48);
-        register_device_value(tag, &hc->heatoffdelay, DeviceValueType::UINT8, FL_(heatoffdelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_heatoffdelay), 1, 48);
+        register_device_value(tag, &hc->heatondelay, DeviceValueType::UINT8, DeviceValueNumOp::DV_NUMOP_DIV4, FL_(heatondelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_heatondelay), 1, 48);
+        register_device_value(tag, &hc->heatoffdelay, DeviceValueType::UINT8, DeviceValueNumOp::DV_NUMOP_DIV4, FL_(heatoffdelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_heatoffdelay), 1, 48);
         register_device_value(tag, &hc->instantstart, DeviceValueType::UINT8, FL_(instantstart), DeviceValueUOM::K, MAKE_CF_CB(set_instantstart), 1, 10);
         register_device_value(tag, &hc->boost, DeviceValueType::BOOL, FL_(boost), DeviceValueUOM::NONE, MAKE_CF_CB(set_boost));
         register_device_value(tag, &hc->boosttime, DeviceValueType::UINT8, FL_(boosttime), DeviceValueUOM::HOURS, MAKE_CF_CB(set_boosttime));
         register_device_value(tag, &hc->coolstart, DeviceValueType::UINT8, FL_(coolstart), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_coolstart), 20, 35);
-        register_device_value(tag, &hc->coolondelay, DeviceValueType::UINT8, FL_(coolondelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_coolondelay), 1, 48);
-        register_device_value(tag, &hc->cooloffdelay, DeviceValueType::UINT8, FL_(cooloffdelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_cooloffdelay), 1, 48);
+        register_device_value(tag, &hc->coolondelay, DeviceValueType::UINT8, DeviceValueNumOp::DV_NUMOP_DIV4,FL_(coolondelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_coolondelay), 1, 48);
+        register_device_value(tag, &hc->cooloffdelay, DeviceValueType::UINT8, DeviceValueNumOp::DV_NUMOP_DIV4, FL_(cooloffdelay), DeviceValueUOM::HOURS, MAKE_CF_CB(set_cooloffdelay), 1, 48);
         register_device_value(tag,
                               &hc->switchProgMode,
                               DeviceValueType::ENUM,