Just read this article about balancing an exhaust only ventilation system with a "passive" fresh air intake.
I was thinking about using his setup with one change. I would use a Fantech FB6 inline filter box to filter the Outside air.
Use a Panasonic 13KVM
Ducting the fresh air supply register into the middle of the living room kitchen area (open floor plan) to get better distribution of the fresh air being introduced.
Anyone seeing a problem with this setup? It would cost a little less than $2 to operate this fresh air intake 24/7 per month with the cost of electricity at $0.12/KW. Not saying I would operate it 24/7 it can be tuned as needed for more or less fresh air.
It beats running the fresh air intake of a dehumidifer with a fan that uses 150W cost of operating per month 24/7 $13.93. Every dollar saved adds up :-)