The General tab covers several high level inputs into the baseline model. Typically these values will not to be changed, however if customization is required, here is a rundown of the inputs.

2030 Building Type

This input controls the benchmarking information provides via the 2030 Challenge DDX connection. The default will match the primary building type selected on the Project Page. If needed the 2030 Building Type can be selected here to refine the benchmarking.

Primary Energy Domestic Hot Water

This inputs controls the primary energy source for Domestic Hot Water (DHW) in a project. The default value is linked to the DHW Generation input on the Building System. The options are with gas or electric which will determine how the energy used for hot water will be costed. Note changes to this input will not impact whole building or breakdown EUI, only the costs.


Primary Energy Heating

The primary energy for heating is the source of heat for the project. This is directly linked with the System Type input on the Building System tab. Each system assigns either gas or electric to this field depending on the Heating System used. It is recommended to not change this field as doing so will create a mismatch between the system used and the calculation of costs.


Building Location Type

The building location type controls the wider context in the simulation. This informs details around the wind behavior and therefore infiltration for the building. The default value will be Urban, however this can be customized as needed to any of these three inputs:

  • Country - Sparsely populated areas with limited buildings around

  • Suburban - Mostly residential area with some buildings, but all low rise

  • Urban - Densely populated and built up areas. City centers

Electricity Utility Rate

This is the cost of electricity used for calculating the yearly energy cost of the project. The defaults are localized to each project location, including the currency. Because utility costs can vary from project to project, It is encouraged to update this value when specific costs are know.

Natural Gas Utility Rate

This is the cost of natural gas used for calculation the yearly energy cost of the project. The defaults are localized to each project location, including the currency. Like the electricity costs it is encouraged to customized these inputs when specific costs are available for a project.

FAQ

What are some typical conversions for utility costs?

  • $/US therm to $/kWh

    • divide your $/US therm value by 29.3001.

    • Example $0.74/therm divide by 29.3001, equals $0.02525/kWh

  • $/US therm to $/kBTU

    • divide your $/US therm value by 99.976.

    • Example $0.74/therm divide by 99.976, equals $0.0074/kBtu

  • $/kWh to $/kBTU

    • divide your $/kWh value by 3.41214.

    • Example $0.1341/kWh divide by 3.412, equals $0.039/kBtu.

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