diff --git a/src/EnergyPlus/SizingManager.cc b/src/EnergyPlus/SizingManager.cc
index ca0e0e31aac..2d3f44bb61a 100644
--- a/src/EnergyPlus/SizingManager.cc
+++ b/src/EnergyPlus/SizingManager.cc
@@ -4981,14 +4981,6 @@ void GetZoneHVACSizing(EnergyPlusData &state)
                     if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity == AutoSize) {
                         state.dataSize->ZoneHVACSizing(zSIndex).RequestAutoSize = true;
                     }
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity < 0.0 &&
-                        state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity != AutoSize) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(
-                            state,
-                            format("Illegal {} = {:.7T}", cNumericFields(iCoolDesignCapacityNumericNum), Numbers(iCoolDesignCapacityNumericNum)));
-                        ErrorsFound = true;
-                    }
                 } else {
                     ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
                     ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iCoolCAPMAlphaNum), Alphas(iCoolCAPMAlphaNum)));
@@ -4999,21 +4991,6 @@ void GetZoneHVACSizing(EnergyPlusData &state)
                 state.dataSize->ZoneHVACSizing(zSIndex).CoolingCapMethod = CapacityPerFloorArea;
                 if (!lNumericBlanks(iCoolCapacityPerFloorAreaNumericNum)) {
                     state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity = Numbers(iCoolCapacityPerFloorAreaNumericNum);
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity <= 0.0) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iCoolCAPMAlphaNum), Alphas(iCoolCAPMAlphaNum)));
-                        ShowContinueError(state,
-                                          format("Illegal {} = {:.7T}",
-                                                 cNumericFields(iCoolCapacityPerFloorAreaNumericNum),
-                                                 Numbers(iCoolCapacityPerFloorAreaNumericNum)));
-                        ErrorsFound = true;
-                        // Autosized input is not allowed
-                    } else if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity == AutoSize) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iCoolCAPMAlphaNum), Alphas(iCoolCAPMAlphaNum)));
-                        ShowContinueError(state, format("Illegal {} = Autosize", cNumericFields(iCoolCapacityPerFloorAreaNumericNum)));
-                        ErrorsFound = true;
-                    }
                 } else {
                     ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
                     ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iCoolCAPMAlphaNum), Alphas(iCoolCAPMAlphaNum)));
@@ -5024,18 +5001,6 @@ void GetZoneHVACSizing(EnergyPlusData &state)
                 state.dataSize->ZoneHVACSizing(zSIndex).CoolingCapMethod = FractionOfAutosizedCoolingCapacity;
                 if (!lNumericBlanks(iCoolFracOfAutosizedCapacityNumericNum)) {
                     state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity = Numbers(iCoolFracOfAutosizedCapacityNumericNum);
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity == AutoSize) {
-                        state.dataSize->ZoneHVACSizing(zSIndex).RequestAutoSize = true;
-                    }
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity < 0.0 &&
-                        state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity != AutoSize) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(state,
-                                          format("Illegal {} = {:.7T}",
-                                                 cNumericFields(iCoolFracOfAutosizedCapacityNumericNum),
-                                                 Numbers(iCoolFracOfAutosizedCapacityNumericNum)));
-                        ErrorsFound = true;
-                    }
                 } else {
                     ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
                     ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iCoolCAPMAlphaNum), Alphas(iCoolCAPMAlphaNum)));
@@ -5058,14 +5023,6 @@ void GetZoneHVACSizing(EnergyPlusData &state)
                     if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity == AutoSize) {
                         state.dataSize->ZoneHVACSizing(zSIndex).RequestAutoSize = true;
                     }
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity < 0.0 &&
-                        state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity != AutoSize) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(
-                            state,
-                            format("Illegal {} = {:.7T}", cNumericFields(iHeatDesignCapacityNumericNum), Numbers(iHeatDesignCapacityNumericNum)));
-                        ErrorsFound = true;
-                    }
                 } else {
                     ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
                     ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iHeatCAPMAlphaNum), Alphas(iHeatCAPMAlphaNum)));
@@ -5076,21 +5033,6 @@ void GetZoneHVACSizing(EnergyPlusData &state)
                 state.dataSize->ZoneHVACSizing(zSIndex).HeatingCapMethod = CapacityPerFloorArea;
                 if (!lNumericBlanks(iHeatCapacityPerFloorAreaNumericNum)) {
                     state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity = Numbers(iHeatCapacityPerFloorAreaNumericNum);
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity <= 0.0) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iHeatCAPMAlphaNum), Alphas(iHeatCAPMAlphaNum)));
-                        ShowContinueError(state,
-                                          format("Illegal {} = {:.7T}",
-                                                 cNumericFields(iHeatCapacityPerFloorAreaNumericNum),
-                                                 Numbers(iHeatCapacityPerFloorAreaNumericNum)));
-                        ErrorsFound = true;
-                        // Autosized input is not allowed
-                    } else if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity == AutoSize) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iHeatCAPMAlphaNum), Alphas(iHeatCAPMAlphaNum)));
-                        ShowContinueError(state, format("Illegal {} = Autosize", cNumericFields(iHeatCapacityPerFloorAreaNumericNum)));
-                        ErrorsFound = true;
-                    }
                 } else {
                     ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
                     ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iHeatCAPMAlphaNum), Alphas(iHeatCAPMAlphaNum)));
@@ -5101,18 +5043,6 @@ void GetZoneHVACSizing(EnergyPlusData &state)
                 state.dataSize->ZoneHVACSizing(zSIndex).HeatingCapMethod = FractionOfAutosizedHeatingCapacity;
                 if (!lNumericBlanks(iHeatFracOfAutosizedCapacityNumericNum)) {
                     state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity = Numbers(iHeatFracOfAutosizedCapacityNumericNum);
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity == AutoSize) {
-                        state.dataSize->ZoneHVACSizing(zSIndex).RequestAutoSize = true;
-                    }
-                    if (state.dataSize->ZoneHVACSizing(zSIndex).ScaledHeatingCapacity < 0.0 &&
-                        state.dataSize->ZoneHVACSizing(zSIndex).ScaledCoolingCapacity != AutoSize) {
-                        ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
-                        ShowContinueError(state,
-                                          format("Illegal {} = {:.7T}",
-                                                 cNumericFields(iHeatFracOfAutosizedCapacityNumericNum),
-                                                 Numbers(iHeatFracOfAutosizedCapacityNumericNum)));
-                        ErrorsFound = true;
-                    }
                 } else {
                     ShowSevereError(state, format("{} = {}", CurrentModuleObject, state.dataSize->ZoneHVACSizing(zSIndex).Name));
                     ShowContinueError(state, format("Input for {} = {}", cAlphaFields(iHeatCAPMAlphaNum), Alphas(iHeatCAPMAlphaNum)));