Adding ducts to unconditioned attic

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zekk828
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Joined: Tue Jun 23, 2020 11:16 am -1100

Adding ducts to unconditioned attic

Post by zekk828 » Thu Jun 25, 2020 10:40 am -1100

Is it possible to add ducts to a location outside the conditioned space (e.g., attic) by somehow:
-Adding a small amount of air exchange (duct leakage) when space-conditioning is called for
-Accounting for duct (and insulation) surface temperature, which would be dependent on space-conditioning schedule

Essentially, I want to account for the heat/coolth and additional moisture added to the attic from these ducts.

I could create rectangular ducts in SketchUp if necessary, but this would still not address the schedule of space-conditioning or conditions within the ducts. Do I have to run the simulation and then use the outputs of the HVAC runtime to create this new schedule? Any simplified methods?

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