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Community and Q&A

Designing a Ventilation System with ERV

green654 | Posted in General Questions on

We are buying a house that used CertainTeed Membraine within the walls. The manufacturer told me it performs best with indoor humidity at 50% of less year round. We live in Chicago with hot humid summers. And because of the odors associated with a new home, we are planning on putting an ERV onto each HVAC unit (one for basement/first floor and one for the upstairs). Unfortunately, we will need to have the ERVs share the duct work with the HVAC. I know it’s not ideal but it is what it is. So my question is…. Would one whole house dehumidifier for basement/first floor be sufficient? Or do we need dehumidification on both units? I realize the ERV will be bringing in hot, humid air during the summer. So what’s the best plan to bring in fresh air and keep humidity down? Thanks!

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  1. Expert Member
    ARMANDO COBO | | #1

    I prefer to install dehumidifiers for each unit. They can be sized accordingly.

    1. green654 | | #2

      How do I determine how to size them

  2. Expert Member
    ARMANDO COBO | | #3

    IMO, I would make sure you have the entire HVAC system properly design, sized and installed, to properly remove most of the humidity year-round. Adding a whole house dehumidifier is perfect for shoulder season and summer humidity. With that in mind, if your HVAC co0ntractor can't figure it out, I would contact Santa Fe Dehumidifiers. They'll be glad to advise you.

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