airloops #188

alexandrecuer · 2026-08-26T14:41:26Z

alexandrecuer
Aug 26, 2026
Maintainer

the basics to start with only a fan

no pratical use, the fan will heat more the zone but it is a test

the difference is in ZoneHVAC:EquipmentConnections

the return node is linked to the exhaust field, which is an "air sample" for a machine

OK

!-   ===========  ALL OBJECTS IN CLASS: SIZING:ZONE ===========

Sizing:Zone,
    RDC,                     !- Zone or ZoneList Name
    SupplyAirTemperature,    !- Zone Cooling Design Supply Air Temperature Input Method
    14,                      !- Zone Cooling Design Supply Air Temperature {C}
    11.11,                   !- Zone Cooling Design Supply Air Temperature Difference {deltaC}
    SupplyAirTemperature,    !- Zone Heating Design Supply Air Temperature Input Method
    40,                      !- Zone Heating Design Supply Air Temperature {C}
    11.11,                   !- Zone Heating Design Supply Air Temperature Difference {deltaC}
    0.0085,                  !- Zone Cooling Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.008,                   !- Zone Heating Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    RDC Zero air DSOA,       !- Design Specification Outdoor Air Object Name
    ,                        !- Zone Heating Sizing Factor
    ,                        !- Zone Cooling Sizing Factor
    DesignDay,               !- Cooling Design Air Flow Method
    0,                       !- Cooling Design Air Flow Rate {m3/s}
    0.000762,                !- Cooling Minimum Air Flow per Zone Floor Area {m3/s-m2}
    0,                       !- Cooling Minimum Air Flow {m3/s}
    0,                       !- Cooling Minimum Air Flow Fraction
    DesignDay,               !- Heating Design Air Flow Method
    0,                       !- Heating Design Air Flow Rate {m3/s}
    0.002032,                !- Heating Maximum Air Flow per Zone Floor Area {m3/s-m2}
    0.1415762,               !- Heating Maximum Air Flow {m3/s}
    0.3,                     !- Heating Maximum Air Flow Fraction
    ,                        !- Design Specification Zone Air Distribution Object Name
    No,                      !- Account for Dedicated Outdoor Air System
    ,                        !- Dedicated Outdoor Air System Control Strategy
    ,                        !- Dedicated Outdoor Air Low Setpoint Temperature for Design {C}
    ,                        !- Dedicated Outdoor Air High Setpoint Temperature for Design {C}
    Sensible Load Only No Latent Load,  !- Zone Load Sizing Method
    HumidityRatioDifference, !- Zone Latent Cooling Design Supply Air Humidity Ratio Input Method
    ,                        !- Zone Dehumidification Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.005,                   !- Zone Cooling Design Supply Air Humidity Ratio Difference {kgWater/kgDryAir}
    HumidityRatioDifference, !- Zone Latent Heating Design Supply Air Humidity Ratio Input Method
    ,                        !- Zone Humidification Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.005;                   !- Zone Humidification Design Supply Air Humidity Ratio Difference {kgWater/kgDryAir}


!-   ===========  ALL OBJECTS IN CLASS: SIZING:SYSTEM ===========

Sizing:System,
    Packaged Rooftop Heat Pump,  !- AirLoop Name
    Sensible,                !- Type of Load to Size On
    Autosize,                !- Design Outdoor Air Flow Rate {m3/s}
    1,                       !- Central Heating Maximum System Air Flow Ratio
    7,                       !- Preheat Design Temperature {C}
    0.008,                   !- Preheat Design Humidity Ratio {kgWater/kgDryAir}
    12.8,                    !- Precool Design Temperature {C}
    0.008,                   !- Precool Design Humidity Ratio {kgWater/kgDryAir}
    12.8,                    !- Central Cooling Design Supply Air Temperature {C}
    40,                      !- Central Heating Design Supply Air Temperature {C}
    NonCoincident,           !- Type of Zone Sum to Use
    No,                      !- 100% Outdoor Air in Cooling
    No,                      !- 100% Outdoor Air in Heating
    0.0085,                  !- Central Cooling Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.008,                   !- Central Heating Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    DesignDay,               !- Cooling Supply Air Flow Rate Method
    0,                       !- Cooling Supply Air Flow Rate {m3/s}
    0.0099676501,            !- Cooling Supply Air Flow Rate Per Floor Area {m3/s-m2}
    1,                       !- Cooling Fraction of Autosized Cooling Supply Air Flow Rate
    3.9475456e-05,           !- Cooling Supply Air Flow Rate Per Unit Cooling Capacity {m3/s-W}
    DesignDay,               !- Heating Supply Air Flow Rate Method
    0,                       !- Heating Supply Air Flow Rate {m3/s}
    0.0099676501,            !- Heating Supply Air Flow Rate Per Floor Area {m3/s-m2}
    1,                       !- Heating Fraction of Autosized Heating Supply Air Flow Rate
    1,                       !- Heating Fraction of Autosized Cooling Supply Air Flow Rate
    3.1588213e-05,           !- Heating Supply Air Flow Rate Per Unit Heating Capacity {m3/s-W}
    ZoneSum,                 !- System Outdoor Air Method
    1,                       !- Zone Maximum Outdoor Air Fraction {dimensionless}
    CoolingDesignCapacity,   !- Cooling Design Capacity Method
    Autosize,                !- Cooling Design Capacity {W}
    234.7,                   !- Cooling Design Capacity Per Floor Area {W/m2}
    1,                       !- Fraction of Autosized Cooling Design Capacity
    HeatingDesignCapacity,   !- Heating Design Capacity Method
    Autosize,                !- Heating Design Capacity {W}
    157,                     !- Heating Design Capacity Per Floor Area {W/m2}
    1,                       !- Fraction of Autosized Heating Design Capacity
    OnOff,                   !- Central Cooling Capacity Control Method
    Autosize;                !- Occupant Diversity


!-   ===========  ALL OBJECTS IN CLASS: ZONECONTROL:THERMOSTAT ===========

ZoneControl:Thermostat,
    RDC Thermostat,          !- Name
    RDC,                     !- Zone or ZoneList Name
    RDC Thermostat Schedule, !- Control Type Schedule Name
    ThermostatSetpoint:SingleHeating,  !- Control 1 Object Type
    Thermostat Setpoint Dual Setpoint 1,  !- Control 1 Name
    ,                        !- Control 2 Object Type
    ,                        !- Control 2 Name
    ,                        !- Control 3 Object Type
    ,                        !- Control 3 Name
    ,                        !- Control 4 Object Type
    ,                        !- Control 4 Name
    0;                       !- Temperature Difference Between Cutout And Setpoint {deltaC}


!-   ===========  ALL OBJECTS IN CLASS: THERMOSTATSETPOINT:SINGLEHEATING ===========

ThermostatSetpoint:SingleHeating,
    Thermostat Setpoint Dual Setpoint 1,  !- Name
    heating schedule;        !- Setpoint Temperature Schedule Name


!-   ===========  ALL OBJECTS IN CLASS: AIRTERMINAL:SINGLEDUCT:CONSTANTVOLUME:NOREHEAT ===========

AirTerminal:SingleDuct:ConstantVolume:NoReheat,
    RDC-Air Terminal Single Duct Constant Volume No Reheat 1,  !- Name
    Always On Discrete,      !- Availability Schedule Name
    Node 14,                 !- Air Inlet Node Name
    Node 9,                  !- Air Outlet Node Name
    AutoSize;                !- Maximum Air Flow Rate {m3/s}


!-   ===========  ALL OBJECTS IN CLASS: ZONEHVAC:AIRDISTRIBUTIONUNIT ===========

ZoneHVAC:AirDistributionUnit,
    ADU RDC-Air Terminal Single Duct Constant Volume No Reheat 1,  !- Name
    Node 9,                  !- Air Distribution Unit Outlet Node Name
    AirTerminal:SingleDuct:ConstantVolume:NoReheat,  !- Air Terminal Object Type
    RDC-Air Terminal Single Duct Constant Volume No Reheat 1;  !- Air Terminal Name


!-   ===========  ALL OBJECTS IN CLASS: ZONEHVAC:EQUIPMENTLIST ===========

ZoneHVAC:EquipmentList,
    RDC Equipment List,      !- Name
    SequentialLoad,          !- Load Distribution Scheme
    ZoneHVAC:AirDistributionUnit,  !- Zone Equipment 1 Object Type
    ADU RDC-Air Terminal Single Duct Constant Volume No Reheat 1,  !- Zone Equipment 1 Name
    1,                       !- Zone Equipment 1 Cooling Sequence
    1,                       !- Zone Equipment 1 Heating or No-Load Sequence
    ,                        !- Zone Equipment 1 Sequential Cooling Fraction Schedule Name
    ;                        !- Zone Equipment 1 Sequential Heating Fraction Schedule Name


!-   ===========  ALL OBJECTS IN CLASS: ZONEHVAC:EQUIPMENTCONNECTIONS ===========

ZoneHVAC:EquipmentConnections,
    RDC,                     !- Zone Name
    RDC Equipment List,      !- Zone Conditioning Equipment List Name
    RDC Inlet Node List,     !- Zone Air Inlet Node or NodeList Name
    ,                        !- Zone Air Exhaust Node or NodeList Name
    Node 2,                  !- Zone Air Node Name
    RDC Return Node List;    !- Zone Return Air Node or NodeList Name


!-   ===========  ALL OBJECTS IN CLASS: FAN:CONSTANTVOLUME ===========

Fan:ConstantVolume,
    Fan Constant Volume 1,   !- Name
    Always On Discrete,      !- Availability Schedule Name
    0.7,                     !- Fan Total Efficiency
    500,                     !- Pressure Rise {Pa}
    AutoSize,                !- Maximum Flow Rate {m3/s}
    0.9,                     !- Motor Efficiency
    1,                       !- Motor In Airstream Fraction
    Node 5,                  !- Air Inlet Node Name
    Node 6;                  !- Air Outlet Node Name


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC ===========

AirLoopHVAC,
    Packaged Rooftop Heat Pump,  !- Name
    ,                        !- Controller List Name
    Packaged Rooftop Heat PumpAvailability Manager List,  !- Availability Manager List Name
    AutoSize,                !- Design Supply Air Flow Rate {m3/s}
    Packaged Rooftop Heat Pump Supply Branches,  !- Branch List Name
    ,                        !- Connector List Name
    Node 5,                  !- Supply Side Inlet Node Name
    Node 8,                  !- Demand Side Outlet Node Name
    Packaged Rooftop Heat Pump Demand Inlet Nodes,  !- Demand Side Inlet Node Names
    Packaged Rooftop Heat Pump Supply Outlet Nodes,  !- Supply Side Outlet Node Names
    1;                       !- Design Return Air Flow Fraction of Supply Air Flow


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:ZONESPLITTER ===========

AirLoopHVAC:ZoneSplitter,
    Air Loop HVAC Zone Splitter 1,  !- Name
    Node 7,                  !- Inlet Node Name
    Node 14;                 !- Outlet 1 Node Name


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:SUPPLYPATH ===========

AirLoopHVAC:SupplyPath,
    Packaged Rooftop Heat Pump Node 7 Supply Path,  !- Name
    Node 7,                  !- Supply Air Path Inlet Node Name
    AirLoopHVAC:ZoneSplitter,!- Component 1 Object Type
    Air Loop HVAC Zone Splitter 1;  !- Component 1 Name


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:ZONEMIXER ===========

AirLoopHVAC:ZoneMixer,
    Air Loop HVAC Zone Mixer 1,  !- Name
    Node 8,                  !- Outlet Node Name
    Node 15;                 !- Inlet 1 Node Name


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:RETURNPATH ===========

AirLoopHVAC:ReturnPath,
    Packaged Rooftop Heat Pump Return Path,  !- Name
    Node 8,                  !- Return Air Path Outlet Node Name
    AirLoopHVAC:ZoneMixer,   !- Component 1 Object Type
    Air Loop HVAC Zone Mixer 1;  !- Component 1 Name


!-   ===========  ALL OBJECTS IN CLASS: BRANCH ===========

Branch,
    Packaged Rooftop Heat Pump Main Branch,  !- Name
    ,                        !- Pressure Drop Curve Name
    Fan:ConstantVolume,      !- Component 1 Object Type
    Fan Constant Volume 1,   !- Component 1 Name
    Node 5,                  !- Component 1 Inlet Node Name
    Node 6;                  !- Component 1 Outlet Node Name


!-   ===========  ALL OBJECTS IN CLASS: BRANCHLIST ===========

BranchList,
    Packaged Rooftop Heat Pump Supply Branches,  !- Name
    Packaged Rooftop Heat Pump Main Branch;  !- Branch 1 Name


!-   ===========  ALL OBJECTS IN CLASS: NODELIST ===========

NodeList,
    RDC Inlet Node List,     !- Name
    Node 9;                  !- Node 1 Name

NodeList,
    RDC Return Node List,    !- Name
    Node 15;                 !- Node 1 Name

NodeList,
    Packaged Rooftop Heat Pump Supply Outlet Nodes,  !- Name
    Node 6;                  !- Node 1 Name

NodeList,
    Packaged Rooftop Heat Pump Demand Inlet Nodes,  !- Name
    Node 7;                  !- Node 1 Name


!-   ===========  ALL OBJECTS IN CLASS: OUTDOORAIR:NODE ===========

OutdoorAir:Node,
    Model Outdoor Air Node;  !- Name


!-   ===========  ALL OBJECTS IN CLASS: AVAILABILITYMANAGER:SCHEDULED ===========

AvailabilityManager:Scheduled,
    Packaged Rooftop Heat Pump Availability Manager,  !- Name
    Always On Discrete;      !- Schedule Name


!-   ===========  ALL OBJECTS IN CLASS: AVAILABILITYMANAGERASSIGNMENTLIST ===========

AvailabilityManagerAssignmentList,
    Packaged Rooftop Heat PumpAvailability Manager List,  !- Name
    AvailabilityManager:Scheduled,  !- Availability Manager 1 Object Type
    Packaged Rooftop Heat Pump Availability Manager;  !- Availability Manager 1 Name

wrong

!-   ===========  ALL OBJECTS IN CLASS: SIZING:ZONE ===========

Sizing:Zone,
    r4,                      !- Zone or ZoneList Name
    SupplyAirTemperature,    !- Zone Cooling Design Supply Air Temperature Input Method
    14,                      !- Zone Cooling Design Supply Air Temperature {C}
    ,                        !- Zone Cooling Design Supply Air Temperature Difference {deltaC}
    SupplyAirTemperature,    !- Zone Heating Design Supply Air Temperature Input Method
    40,                      !- Zone Heating Design Supply Air Temperature {C}
    ,                        !- Zone Heating Design Supply Air Temperature Difference {deltaC}
    0.008,                   !- Zone Cooling Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.008,                   !- Zone Heating Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    r4_design_spec_oa,       !- Design Specification Outdoor Air Object Name
    ,                        !- Zone Heating Sizing Factor
    ,                        !- Zone Cooling Sizing Factor
    DesignDay,               !- Cooling Design Air Flow Method
    0.6,                     !- Cooling Design Air Flow Rate {m3/s}
    0.000762,                !- Cooling Minimum Air Flow per Zone Floor Area {m3/s-m2}
    0,                       !- Cooling Minimum Air Flow {m3/s}
    0.2,                     !- Cooling Minimum Air Flow Fraction
    DesignDay,               !- Heating Design Air Flow Method
    0,                       !- Heating Design Air Flow Rate {m3/s}
    0.002032,                !- Heating Maximum Air Flow per Zone Floor Area {m3/s-m2}
    0.1415762,               !- Heating Maximum Air Flow {m3/s}
    0.3,                     !- Heating Maximum Air Flow Fraction
    ,                        !- Design Specification Zone Air Distribution Object Name
    No,                      !- Account for Dedicated Outdoor Air System
    NeutralSupplyAir,        !- Dedicated Outdoor Air System Control Strategy
    autosize,                !- Dedicated Outdoor Air Low Setpoint Temperature for Design {C}
    autosize,                !- Dedicated Outdoor Air High Setpoint Temperature for Design {C}
    Sensible Load Only No Latent Load,  !- Zone Load Sizing Method
    HumidityRatioDifference, !- Zone Latent Cooling Design Supply Air Humidity Ratio Input Method
    ,                        !- Zone Dehumidification Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.005,                   !- Zone Cooling Design Supply Air Humidity Ratio Difference {kgWater/kgDryAir}
    HumidityRatioDifference, !- Zone Latent Heating Design Supply Air Humidity Ratio Input Method
    ,                        !- Zone Humidification Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.005;                   !- Zone Humidification Design Supply Air Humidity Ratio Difference {kgWater/kgDryAir}


!-   ===========  ALL OBJECTS IN CLASS: SIZING:SYSTEM ===========

Sizing:System,
    airloop,                 !- AirLoop Name
    Sensible,                !- Type of Load to Size On
    autosize,                !- Design Outdoor Air Flow Rate {m3/s}
    autosize,                !- Central Heating Maximum System Air Flow Ratio
    7,                       !- Preheat Design Temperature {C}
    0.008,                   !- Preheat Design Humidity Ratio {kgWater/kgDryAir}
    12.8,                    !- Precool Design Temperature {C}
    0.008,                   !- Precool Design Humidity Ratio {kgWater/kgDryAir}
    12.8,                    !- Central Cooling Design Supply Air Temperature {C}
    40,                      !- Central Heating Design Supply Air Temperature {C}
    NonCoincident,           !- Type of Zone Sum to Use
    No,                      !- 100% Outdoor Air in Cooling
    No,                      !- 100% Outdoor Air in Heating
    0.008,                   !- Central Cooling Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    0.008,                   !- Central Heating Design Supply Air Humidity Ratio {kgWater/kgDryAir}
    DesignDay,               !- Cooling Supply Air Flow Rate Method
    0,                       !- Cooling Supply Air Flow Rate {m3/s}
    ,                        !- Cooling Supply Air Flow Rate Per Floor Area {m3/s-m2}
    ,                        !- Cooling Fraction of Autosized Cooling Supply Air Flow Rate
    ,                        !- Cooling Supply Air Flow Rate Per Unit Cooling Capacity {m3/s-W}
    DesignDay,               !- Heating Supply Air Flow Rate Method
    0,                       !- Heating Supply Air Flow Rate {m3/s}
    ,                        !- Heating Supply Air Flow Rate Per Floor Area {m3/s-m2}
    ,                        !- Heating Fraction of Autosized Heating Supply Air Flow Rate
    ,                        !- Heating Fraction of Autosized Cooling Supply Air Flow Rate
    ,                        !- Heating Supply Air Flow Rate Per Unit Heating Capacity {m3/s-W}
    ZoneSum,                 !- System Outdoor Air Method
    1,                       !- Zone Maximum Outdoor Air Fraction {dimensionless}
    CoolingDesignCapacity,   !- Cooling Design Capacity Method
    autosize,                !- Cooling Design Capacity {W}
    ,                        !- Cooling Design Capacity Per Floor Area {W/m2}
    ,                        !- Fraction of Autosized Cooling Design Capacity
    HeatingDesignCapacity,   !- Heating Design Capacity Method
    autosize,                !- Heating Design Capacity {W}
    ,                        !- Heating Design Capacity Per Floor Area {W/m2}
    ,                        !- Fraction of Autosized Heating Design Capacity
    OnOff,                   !- Central Cooling Capacity Control Method
    autosize;                !- Occupant Diversity


!-   ===========  ALL OBJECTS IN CLASS: ZONECONTROL:THERMOSTAT ===========

ZoneControl:Thermostat,
    r4_thermostat,           !- Name
    r4,                      !- Zone or ZoneList Name
    AlwaysDualSetpoint,      !- Control Type Schedule Name
    THERMOSTATSETPOINT:DUALSETPOINT,  !- Control 1 Object Type
    dual_thermostat,         !- Control 1 Name
    ,                        !- Control 2 Object Type
    ,                        !- Control 2 Name
    ,                        !- Control 3 Object Type
    ,                        !- Control 3 Name
    ,                        !- Control 4 Object Type
    ,                        !- Control 4 Name
    0;                       !- Temperature Difference Between Cutout And Setpoint {deltaC}


!-   ===========  ALL OBJECTS IN CLASS: THERMOSTATSETPOINT:DUALSETPOINT ===========

ThermostatSetpoint:DualSetpoint,
    dual_thermostat,         !- Name
    heating_schedule_20,     !- Heating Setpoint Temperature Schedule Name
    const_temp_sched_25deg;  !- Cooling Setpoint Temperature Schedule Name


!-   ===========  ALL OBJECTS IN CLASS: AIRTERMINAL:SINGLEDUCT:CONSTANTVOLUME:NOREHEAT ===========

AirTerminal:SingleDuct:ConstantVolume:NoReheat,
    cv_no_reheat_r4 terminal unit,  !- Name
    ,                        !- Availability Schedule Name
    cv_no_reheat_r4 terminal unit inlet node,  !- Air Inlet Node Name
    r4_inlet_air_node,       !- Air Outlet Node Name
    Autosize;                !- Maximum Air Flow Rate {m3/s}


!-   ===========  ALL OBJECTS IN CLASS: ZONEHVAC:AIRDISTRIBUTIONUNIT ===========

ZoneHVAC:AirDistributionUnit,
    cv_no_reheat_r4,         !- Name
    r4_inlet_air_node,       !- Air Distribution Unit Outlet Node Name
    AIRTERMINAL:SINGLEDUCT:CONSTANTVOLUME:NOREHEAT,  !- Air Terminal Object Type
    cv_no_reheat_r4 terminal unit,  !- Air Terminal Name
    0,                       !- Nominal Upstream Leakage Fraction
    0;                       !- Constant Downstream Leakage Fraction


!-   ===========  ALL OBJECTS IN CLASS: ZONEHVAC:EQUIPMENTLIST ===========

ZoneHVAC:EquipmentList,
    r4 equipment list,       !- Name
    SequentialLoad,          !- Load Distribution Scheme
    ZONEHVAC:AIRDISTRIBUTIONUNIT,  !- Zone Equipment 1 Object Type
    cv_no_reheat_r4,         !- Zone Equipment 1 Name
    1,                       !- Zone Equipment 1 Cooling Sequence
    0,                       !- Zone Equipment 1 Heating or No-Load Sequence
    ,                        !- Zone Equipment 1 Sequential Cooling Fraction Schedule Name
    ;                        !- Zone Equipment 1 Sequential Heating Fraction Schedule Name


!-   ===========  ALL OBJECTS IN CLASS: ZONEHVAC:EQUIPMENTCONNECTIONS ===========

ZoneHVAC:EquipmentConnections,
    r4,                      !- Zone Name
    r4 equipment list,       !- Zone Conditioning Equipment List Name
    r4_inlet_air_node,       !- Zone Air Inlet Node or NodeList Name
    r4_return_air_node,      !- Zone Air Exhaust Node or NodeList Name
    r4_air_node;             !- Zone Air Node Name


!-   ===========  ALL OBJECTS IN CLASS: FAN:CONSTANTVOLUME ===========

Fan:ConstantVolume,
    constant_fan,            !- Name
    ,                        !- Availability Schedule Name
    0.7,                     !- Fan Total Efficiency
    500,                     !- Pressure Rise {Pa}
    Autosize,                !- Maximum Flow Rate {m3/s}
    0.9,                     !- Motor Efficiency
    1,                       !- Motor In Airstream Fraction
    airloop_air_supply_inlet_node,  !- Air Inlet Node Name
    airloop_air_supply_outlet_node,  !- Air Outlet Node Name
    General;                 !- End-Use Subcategory


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC ===========

AirLoopHVAC,
    airloop,                 !- Name
    ,                        !- Controller List Name
    airloop availability manager list,  !- Availability Manager List Name
    Autosize,                !- Design Supply Air Flow Rate {m3/s}
    airloop air_supply branch list,  !- Branch List Name
    ,                        !- Connector List Name
    airloop_air_supply_inlet_node,  !- Supply Side Inlet Node Name
    airloop_demand_outlet_node,  !- Demand Side Outlet Node Name
    airloop_demand_inlet_Node_List,  !- Demand Side Inlet Node Names
    airloop_air_supply_outlet_Node_List,  !- Supply Side Outlet Node Names
    1;                       !- Design Return Air Flow Fraction of Supply Air Flow


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:ZONESPLITTER ===========

AirLoopHVAC:ZoneSplitter,
    airloop airzone splitter,!- Name
    airloop_demand_inlet_node,  !- Inlet Node Name
    cv_no_reheat_r4 terminal unit inlet node;  !- Outlet 1 Node Name


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:SUPPLYPATH ===========

AirLoopHVAC:SupplyPath,
    airloop supply path,     !- Name
    airloop_demand_inlet_node,  !- Supply Air Path Inlet Node Name
    AIRLOOPHVAC:ZONESPLITTER,!- Component 1 Object Type
    airloop airzone splitter;!- Component 1 Name


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:ZONEMIXER ===========

AirLoopHVAC:ZoneMixer,
    airloop airzone mixer,   !- Name
    airloop_demand_outlet_node,  !- Outlet Node Name
    r4_return_air_node;      !- Inlet 1 Node Name


!-   ===========  ALL OBJECTS IN CLASS: AIRLOOPHVAC:RETURNPATH ===========

AirLoopHVAC:ReturnPath,
    airloop return path,     !- Name
    airloop_demand_outlet_node,  !- Return Air Path Outlet Node Name
    AIRLOOPHVAC:ZONEMIXER,   !- Component 1 Object Type
    airloop airzone mixer;   !- Component 1 Name


!-   ===========  ALL OBJECTS IN CLASS: BRANCH ===========

Branch,
    airloop_air_supply_branch,  !- Name
    ,                        !- Pressure Drop Curve Name
    FAN:CONSTANTVOLUME,      !- Component 1 Object Type
    constant_fan,            !- Component 1 Name
    airloop_air_supply_inlet_node,  !- Component 1 Inlet Node Name
    airloop_air_supply_outlet_node;  !- Component 1 Outlet Node Name


!-   ===========  ALL OBJECTS IN CLASS: BRANCHLIST ===========

BranchList,
    airloop air_supply branch list,  !- Name
    airloop_air_supply_branch;  !- Branch 1 Name


!-   ===========  ALL OBJECTS IN CLASS: NODELIST ===========

NodeList,
    airloop_air_supply_outlet_Node_List,  !- Name
    airloop_air_supply_outlet_node;  !- Node 1 Name

NodeList,
    airloop_demand_inlet_Node_List,  !- Name
    airloop_demand_inlet_node;  !- Node 1 Name


!-   ===========  ALL OBJECTS IN CLASS: AVAILABILITYMANAGER:SCHEDULED ===========

AvailabilityManager:Scheduled,
    airloop manager,         !- Name
    Always On;               !- Schedule Name


!-   ===========  ALL OBJECTS IN CLASS: AVAILABILITYMANAGERASSIGNMENTLIST ===========

AvailabilityManagerAssignmentList,
    airloop availability manager list,  !- Name
    AVAILABILITYMANAGER:SCHEDULED,  !- Availability Manager 1 Object Type
    airloop manager;         !- Availability Manager 1 Name

alexandrecuer · 2026-08-28T10:02:53Z

alexandrecuer
Aug 28, 2026
Maintainer Author

dual air loop

https://www.youtube.com/watch?v=G1ikmKBQx-M

https://www.helix-engineers.net/

0 replies

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airloops #188

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alexandrecuer Aug 26, 2026 Maintainer

the basics to start with only a fan

OK

wrong

Replies: 1 comment

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alexandrecuer Aug 28, 2026 Maintainer Author

dual air loop

alexandrecuer
Aug 26, 2026
Maintainer

alexandrecuer
Aug 28, 2026
Maintainer Author