Ventilation for Ductless HVAC Systems in Mild Climates
I know that California in particular a lot of new “ADU’s” and small homes being built with ductless HVAC systems. I hear so much about heating these units with ‘Mini-Splits’ but no-one (energy consultants included) seems to mention ventilation. Lets assume a mild, coastal climate and a relatively open floor plan.
-Are HRV’s worth the cost in such a climate and such small spaces (especially considering most are designed for ducted systems) ?
-Anyone using “exhaust only” or “supply only” systems successfully?
-Has anyone come across a good return air filtration system for wildfire smoke that can be set up without a ducted system?
I have read https://www.greenbuildingadvisor.com/article/designing-a-good-ventilation-system
But I think that article is little biased towards relatively large homes in colder climates.
I have also researched the Lunos units but they seems expensive and more advantageous for larger homes with many individual rooms instead of open floorpan.
Thanks for the input,
Petaluma CA, climate zone 3C
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