The more I read about HRV and ERVs – the more I think that spending a bit extra up front and using BOTH is a better solution (costs aside). Here’s what I mean:
If we built a house with 3 bedrooms and 2.5 baths:
– A whole home ERV could be installed, with return ducts in the three bathrooms and kitchen and supply ducts in the bedrooms and living areas. This ERV would run 24×7.
– In the two bathrooms with showers, put in a smaller HRV with return ducting in the shower enclosure ceiling (I’m thinking something like a Fantech SH704) and supply ducting elsewhere in the same bathroom. This HRV would be installed on a timer or simple on-off switch like a typical bathroom fan.
This setup, the HRVs in the shower would exhaust more water vapor while someone is showering – exactly when the vapor is being created – while at the same time, then whole home ERV helps to keep moisture levels more moderated throughout the day.
Is this design (excluding the extra cost) a reasonable solution?
Also – lobbing this out – how do people handle vent hood ventilation? We often do a lot of cooking, so I would like to ensure the smells/smoke/etc doesn’t just recirculate within the home… but I read lots of stuff about NOT venting to the outside and it seems there isn’t a balanced kitchen ventilation system unless I’m missing something.
All this would be in the Portland, OR metro area.
Thanks in advance.
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