# Vargroup design

> 120 varkeys in the design vargroup (shared): names, types, units and meanings.

 Kind: `shared`. 120 varkeys.

| Varkey | Title | Type | Units | Meaning | Aliases |
|---|---|---|---|---|---|
| <span id="allowPipeDiff"></span>`allowPipeDiff` | Allow different flow and return pipe sizing | boolean |  |  |  |
| <span id="ASHPkW"></span>`ASHPkW` | ASHPkW | number |  |  |  |
| <span id="ASHPkWPeak"></span>`ASHPkWPeak` | ASHPkWPeak | number |  |  |  |
| <span id="ASHPkWxN1"></span>`ASHPkWxN1` | ASHPkWxN1 | number |  |  |  |
| <span id="ASHPQty"></span>`ASHPQty` | ASHPQty | number |  |  |  |
| <span id="baseTemp"></span>`baseTemp` | Base temperature | select |  |  |  |
| <span id="boilerEmissions"></span>`boilerEmissions` | Boiler Emissions | number | kgCO2/kWh |  |  |
| <span id="boilerFuel"></span>`boilerFuel` | Boiler fuel type | select |  |  |  |
| <span id="boilerkWPeak"></span>`boilerkWPeak` | boilerkWPeak | number |  |  |  |
| <span id="boilerkWxN1"></span>`boilerkWxN1` | boilerkWxN1 | number |  |  |  |
| <span id="borePeak"></span>`borePeak` | borePeak | number |  |  |  |
| <span id="bufferkWh"></span>`bufferkWh` | bufferkWh | number |  |  |  |
| <span id="carbonFactorElec"></span>`carbonFactorElec` | Electricity carbon factor | number | kgCO2e/kWh | Carbon factor for grid electricity | co2Elec |
| <span id="carbonFactorGas"></span>`carbonFactorGas` | Gas carbon factor | number | kgCO2e/kWh | Carbon factor for gas (UK Government GHG conversion factors) | co2Gas |
| <span id="connectionCH"></span>`connectionCH` | Central heating connection | select |  |  |  |
| <span id="dDaysCalc"></span>`dDaysCalc` | dDaysCalc | number |  |  |  |
| <span id="dDaysPeak"></span>`dDaysPeak` | dDaysPeak | number |  |  |  |
| <span id="degDays"></span>`degDays` | Central heating degree-days at base temperature | number | °days |  |  |
| <span id="degDaysAvg"></span>`degDaysAvg` | Central heating degree-days | csv | °days |  |  |
| <span id="density"></span>`density` | density | number |  |  |  |
| <span id="divCH"></span>`divCH` | Central heating diversity | number | % |  |  |
| <span id="efficiency"></span>`efficiency` | Minimum Generation Efficiency | number | % |  |  |
| <span id="elecEmissions"></span>`elecEmissions` | Electrical Supply Emissions | number | kgCO2/kWh |  |  |
| <span id="elecPrice"></span>`elecPrice` | Electricity unit price | number | p/kWh | Electricity unit price | costElec |
| <span id="email"></span>`email` | Email address | email |  |  |  |
| <span id="eqDaysPeak"></span>`eqDaysPeak` | eqDaysPeak | number |  |  |  |
| <span id="eqPropDS439"></span>`eqPropDS439` | eqPropDS439 | number |  |  |  |
| <span id="fridgeASHP"></span>`fridgeASHP` | ASHP refrigerant | select |  |  |  |
| <span id="fridgeWSHP"></span>`fridgeWSHP` | WSHP refrigerant | select |  |  |  |
| <span id="gasCalorificValue"></span>`gasCalorificValue` | Gas calorific value | number | MJ/m³ | Calorific value used to convert metered gas m³ to kWh (kWh = m³ × correction × CV ÷ 3.6) | calorificGas |
| <span id="gasPrice"></span>`gasPrice` | Gas unit price | number | p/kWh | Gas unit price | costGas |
| <span id="gasVolumeCorrection"></span>`gasVolumeCorrection` | Gas volume correction | number | factor | Gas volume correction factor applied to metered m³ |  |
| <span id="goASHP"></span>`goASHP` | Air Source Heat Pumps | boolean |  |  |  |
| <span id="goBoilers"></span>`goBoilers` | Boilers | boolean |  |  |  |
| <span id="goCHP"></span>`goCHP` | Combined Heat & Power | boolean |  |  |  |
| <span id="goHN"></span>`goHN` | External Heat Network Supply | boolean |  |  |  |
| <span id="goReclaim"></span>`goReclaim` | Cooling Source Heat Pumps | boolean |  |  |  |
| <span id="goSave"></span>`goSave` | Save design | boolean |  |  |  |
| <span id="goSolar"></span>`goSolar` | Solar Thermal | boolean |  |  |  |
| <span id="goWSHP"></span>`goWSHP` | Water Source Heat Pumps | boolean |  |  |  |
| <span id="hHighPoint"></span>`hHighPoint` | System height | number | m |  |  |
| <span id="kwCH"></span>`kwCH` | kwCH | number |  |  |  |
| <span id="kwDHWEst"></span>`kwDHWEst` | kwDHWEst | number |  |  |  |
| <span id="kwDS439"></span>`kwDS439` | kwDS439 | number |  |  |  |
| <span id="kwh365"></span>`kwh365` | kwh365 | number |  |  |  |
| <span id="kwhAnnualPump"></span>`kwhAnnualPump` | Design Annual Pump Energy Use | number | kWh |  |  |
| <span id="kwhCH"></span>`kwhCH` | kwhCH | number |  |  |  |
| <span id="kwhCH365"></span>`kwhCH365` | kwhCH365 | number |  |  |  |
| <span id="kwhDHW365"></span>`kwhDHW365` | kwhDHW365 | number |  |  |  |
| <span id="kwhDHWEST"></span>`kwhDHWEST` | kwhDHWEST | number |  |  |  |
| <span id="kwhDistLoss365"></span>`kwhDistLoss365` | kwhDistLoss365 | number |  |  |  |
| <span id="kwhP24"></span>`kwhP24` | kwhP24 | number |  |  |  |
| <span id="kwhUsed365"></span>`kwhUsed365` | kwhUsed365 | number |  |  |  |
| <span id="kWInPeak"></span>`kWInPeak` | kWInPeak | number |  |  |  |
| <span id="kwP24"></span>`kwP24` | kwP24 | number |  |  |  |
| <span id="kwPeak"></span>`kwPeak` | kwPeak | number |  |  |  |
| <span id="kWxN1"></span>`kWxN1` | kWxN1 | number |  |  |  |
| <span id="listASHPSizes"></span>`listASHPSizes` | Available heat pump outputs | csv | kW |  |  |
| <span id="listBSizes"></span>`listBSizes` | Available boiler outputs | csv | kW |  |  |
| <span id="listWSHPSizes"></span>`listWSHPSizes` | Available heat pump outputs | csv | kW |  |  |
| <span id="loadSchedule"></span>`loadSchedule` | Schedule of loads | sheet |  |  |  |
| <span id="m3hCHPeak"></span>`m3hCHPeak` | m3hCHPeak | number |  |  |  |
| <span id="m3hDHWPeak"></span>`m3hDHWPeak` | DHW Readings, Meter Flow Rate | number | m³/h |  |  |
| <span id="m3hPeak"></span>`m3hPeak` | m3hPeak | number |  |  |  |
| <span id="maxApproachTemp"></span>`maxApproachTemp` | Maximum PHE Approach Temperature | number | °C |  |  |
| <span id="maxBypassFlow"></span>`maxBypassFlow` | Design maximum bypass flowrate | number | m³/h |  |  |
| <span id="maxDPOff"></span>`maxDPOff` | Maximum Supply DP | number | kPa |  |  |
| <span id="maxDPSupply"></span>`maxDPSupply` | Maximum Supply DP | number | kPa |  |  |
| <span id="maxPressure"></span>`maxPressure` | Maximum System Pressure | number | bar |  |  |
| <span id="maxVelocity"></span>`maxVelocity` | Flow pipe sizing maximum velocity | number | m/s |  |  |
| <span id="minDPIndex"></span>`minDPIndex` | Minimum Index Differential Pressure | number | kPa |  |  |
| <span id="minFlowTemp"></span>`minFlowTemp` | Minimum Flow Temperature | number | °C |  |  |
| <span id="minFlowTempOff"></span>`minFlowTempOff` | Minimum Output Temperature | number | °C |  |  |
| <span id="minVelocity"></span>`minVelocity` | Return pipe sizing minimum velocity | number | m/s |  |  |
| <span id="nBuildings"></span>`nBuildings` | Number of buildings | integer | buildings |  |  |
| <span id="networkName"></span>`networkName` | Network name | text |  |  |  |
| <span id="networkTempValve"></span>`networkTempValve` | Network temperature control valve | boolean |  |  |  |
| <span id="nIntakes"></span>`nIntakes` | Number of intake plantrooms | integer | intakes |  |  |
| <span id="nPeople"></span>`nPeople` | Total number of people | integer | people |  |  |
| <span id="nProperties"></span>`nProperties` | Number of properties | integer | properties |  |  |
| <span id="ovsersizing"></span>`ovsersizing` | ovsersizing | number |  |  |  |
| <span id="ovsersizingN1"></span>`ovsersizingN1` | ovsersizingN1 | number |  |  |  |
| <span id="peepDS439"></span>`peepDS439` | peepDS439 | number |  |  |  |
| <span id="pipeSizes"></span>`pipeSizes` | Schedule of pipes sizes | sheet |  |  |  |
| <span id="pPP"></span>`pPP` | pPP | number |  |  |  |
| <span id="profileDHW"></span>`profileDHW` | DHW load profile | select |  |  |  |
| <span id="selectASHP"></span>`selectASHP` | ASHP selection | object | n x kW |  |  |
| <span id="selectBoilers"></span>`selectBoilers` | Boiler selection | object | n x kW |  |  |
| <span id="selectWSHP"></span>`selectWSHP` | WSHP selection | object | n x kW |  |  |
| <span id="sessionIdleMinutes"></span>`sessionIdleMinutes` | Session idle minutes | number | min | Idle gap that closes an equipment session (spray booth firing sequence) |  |
| <span id="sparekW"></span>`sparekW` | sparekW | number |  |  |  |
| <span id="substationType"></span>`substationType` | Substation Type | select |  |  |  |
| <span id="supplyCWS"></span>`supplyCWS` | CWS Supply | select |  |  |  |
| <span id="systemVolume"></span>`systemVolume` | Central Heating Volume | number | l |  |  |
| <span id="tariffHP"></span>`tariffHP` | Electrical Tariff | select |  |  |  |
| <span id="tF"></span>`tF` | Design flow temperature | number | °C |  |  |
| <span id="tFOff"></span>`tFOff` | Design flow temperature (secondary) | number | °C |  |  |
| <span id="tPeak"></span>`tPeak` | Peak network flow temperature | number | °C |  |  |
| <span id="tPriRtnCH"></span>`tPriRtnCH` | Central heating network return temperature | number | °C |  |  |
| <span id="tPriRtnDHW"></span>`tPriRtnDHW` | DHW network return temperature | number | °C |  |  |
| <span id="tPriRtnPeak"></span>`tPriRtnPeak` | tPriRtnPeak | number |  |  |  |
| <span id="tR"></span>`tR` | Expected average return temperature | number | °C |  |  |
| <span id="tRiseEST"></span>`tRiseEST` | tRiseEST | number |  |  |  |
| <span id="tVWART24"></span>`tVWART24` | tVWART24 | number |  |  |  |
| <span id="tXPeak"></span>`tXPeak` | External temperature at peak load | number | °C |  |  |
| <span id="typeEmitter"></span>`typeEmitter` | Central heating emitter | select |  |  |  |
| <span id="typeRTL"></span>`typeRTL` | Radiator return control | select |  |  |  |
| <span id="typeTRV"></span>`typeTRV` | Radiator flow control | select |  |  |  |
| <span id="vBuffer"></span>`vBuffer` | Buffer volume | number | l |  |  |
| <span id="vBuffer9"></span>`vBuffer9` | vBuffer9 | number |  |  |  |
| <span id="vDHWEST"></span>`vDHWEST` | vDHWEST | number |  |  |  |
| <span id="vP24"></span>`vP24` | vP24 | number |  |  |  |
| <span id="vPCH"></span>`vPCH` | vPCH | number |  |  |  |
| <span id="vPDHW"></span>`vPDHW` | vPDHW | number |  |  |  |
| <span id="vPHEST"></span>`vPHEST` | vPHEST | number |  |  |  |
| <span id="vPPEST"></span>`vPPEST` | vPPEST | number |  |  |  |
| <span id="WSHPkW"></span>`WSHPkW` | WSHPkW | number |  |  |  |
| <span id="WSHPkWPeak"></span>`WSHPkWPeak` | WSHPkWPeak | number |  |  |  |
| <span id="WSHPkWxN1"></span>`WSHPkWxN1` | WSHPkWxN1 | number |  |  |  |
| <span id="WSHPQty"></span>`WSHPQty` | WSHPQty | number |  |  |  |