Effect of stack vent, range hood vent, etc. on efficiency
We are building a new home in central IL. If you recall, we have an EPDM roof with 1:12 pitch and 10″ rigid foam above the roof deck. The vertical walls are insulted all the way to the roof leaving conditioned space in the attic. The exterior will have 2″ rigid foam and EIFS.
My question is about how stack vents and other vents affect the efficiency of a home. I realize stack vents are necessary, but I hate seeing 3 pipes run through my roof after spending a lot of $ on rigid foam above the roof. Are stack vents equipped with a damper or have some way of preventing outside air from entering our home?
Also, ductwork is being ran out the back of the house for our range hood. Same questions about maximizing efficiency for this vent.
I have read about tight homes creating situations of negative pressure. Should an HRV/ERV be installed to prevent this issue? If so, is the HRV/ERV ducted out through a wall in the conditioned attic space? We have not drywalled anything yet, but I don’t want to create a hole in our roof for a vent.
Thanks for all your help Martin and others!
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