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Community and Q&A

Bath exhaust with ERV in the South?

ColbyForester | Posted in General Questions on

I am currently building a house and would like to use a  ERV for bath fan exhaust for all of the bathrooms. My problem is I live in the South and the air gets pretty humid in the summer. Would using a ERV still be a viable option or should I go exhaust only for each bath? I assume if I exhaust the bathrooms then I would need a HRV to combat the outside humidity?

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  1. GBA Editor
    Martin Holladay | | #1

    Many ventilation experts recommend that using an HRV for exhausting air from bathrooms is better than using an ERV, and -- at least in theory -- they're right. That said, I'm not sure how much difference it makes in a long run.

    In general, I think that the purported advantages of an ERV compared to an HRV are usually overstated, and in most situations, either can work.

    For more information, see these two articles:

    "Does a Home with an HRV Also Need Bath Fans?"

    "HRV or ERV?"

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