I have completed some energy upgrades to my 1983 2 story slab on grade house in climate zone 6. My final blower door test revealed an ACH rate of 1.9 for 1900 sq feet. There is no ductwork (heating with minisplits) and no bathroom fans and it was recommended by my energy advisor to add an hrv/erv. I guess i am wondering if you in the community think its worth it to retrofit ductwork and install an HRV. The house isnt super tight and its a big expense/renovation to start installing the equipment.
I guess at a minimum I should install some bath fans, but would this be enough? Also, I dont want to install the bathroom in the ceiling on the upper floor as I would prefer not to punch a hole into my attic, can most fans be installed on a wall?
Thanks in advance for any thoughts/comments
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