Hello All!

I'm working on a Whole Building Simulation according 90.1-2004 for a C&S
Project. We use heating energy from a district heating network. Heat is
generated by about 20 different plants which feed the network. Some plants
are heating only, but the majority are cogeneration plants.

We would like to apply for points in Step 2 (Required Treatment of District
Thermal Energy) but we cannot verify the annual efficiency of the plants.

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CHP Calculation Methodology for LEED-NC v2.2 EA Credit 1:

1. The minimum annual CHP system efficiency must be at least 60%. Efficiency
is expressed by the following equation:

Annual CHP Efficiency = (Annual Btu electrical output of the fuel-driven
electricity

generator + Annual Btu Thermal Product) / Annual Btu fuel input (Lower
Heating Value of input fuel)

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Is there a way to apply for points using a default annual efficiency? Sth.
like described in "Required Treatment of District Thermal Energy" on page 7
and 8?

Any other ideas?

Best regards

Johannes.