Return Air Type

ASHRAE 90.1-2019 PRM Reference Manual

For baseline building systems 1 and 2, the return air path shall be direct-to-unit. For baseline building systems 3 through 8 and 11 through 13 and when the proposed design is direct-to-unit, the baseline building shall be ducted return, otherwise the baseline building return air path shall be the same as proposed design.

Implementation

For each zone:

Once the systems have been created:

To simplify reporting at that point, use ducted_return_or_direct_to_unit and return_plenum as the additional property field.

Key Ruby Methods

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