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System sizing with ERV

asked 2015-10-21 12:13:24 -0500

ngkhanh's avatar

updated 2017-05-17 12:53:21 -0500

Hello I wonder how OS (E+) size the system with ERV ? I made a 1 zone PTHP with ERV sized for ventilation . The PTHP capacity did not change after add ERV system. In pratice, we can use ERV to reduce PTHP size - we could do like this in OS E+ by autosizing, could not we ? Thanks

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answered 2015-10-21 12:44:53 -0500

Did you turn the OA on the PTHP off when you added the ERV? The PTHP size will not change if it and the ERV are both supplying the zone with OA. Below is an image of turning the OA off in OpenStudio, the inputs should be the same in E+.

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Yes i did it. The ERV was selected for Ventilation requirement in Airloop and get exactly outdoor rate.

ngkhanh's avatar ngkhanh  ( 2015-10-21 14:42:06 -0500 )edit

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Asked: 2015-10-21 12:13:24 -0500

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Last updated: Oct 21 '15