Annual energy costs shall be determined using either actual tariffs of purchased energy or the state average energy prices published by the Energy Information Administration (EIA). COMNET also provides default time-of-use rates based on state averages. Rates from different sources cannot be mixed for the same project.
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Currency |
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Applicability |
All projects |
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Definition |
The currency used to compare the proposed design and the baseline building. Cost is the currency used for most purposes, although the Design to Earn ENERGY STAR and ASHRAE Building EQ programs use source energy. |
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Units |
List: local energy costs, default time-of-use energy costs, EPA source energy, or site energy. |
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Input Restrictions |
Energy modelers should use local rates when they are known and available, otherwise, |
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Baseline Rules |
Same as the proposed design |
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Electric Utility Tariff |
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Applicability |
When Currency (see above) is "local energy costs" |
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Definition |
The local utility rate for electricity delivered to the building. The utility rate data entered under this descriptor may include a variety of rate features, such as demand charges, time of day rates, service charges, and taxes. |
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Units |
Data structure |
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Input Restrictions |
None |
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Baseline Rules |
The baseline building shall use the same utility rate as the proposed design. |
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Gas Utility Tariff |
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Applicability |
When Currency (see above) is "local energy costs" |
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Definition |
The utility rates for natural gas delivered to the building. The utility rate data entered under this descriptor may include seasonal variations, service charges, and taxes. |
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Units |
Data structure |
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Input Restrictions |
None |
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Baseline Rules |
The baseline building shall use the same utility rate as the proposed design. |
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Other Utility Tariff |
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Applicability |
When Currency (see above) is "local energy costs" |
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Definition |
The utility rates for chilled water, steam or other energy sources delivered to the building. The utility rate data entered under this descriptor may include seasonal variations, service charges, taxes, and other factors. |
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Units |
Data structure |
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Input Restrictions |
None |
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Baseline Rules |
The baseline building shall use the same utility rate as the proposed design. |
Not applicable for Design to Earn Building EQ.
Not applicable for Design to Earn ENERGY STAR.