Not a whole lot, although the air getting sucked out is not really changed with only outside air, but will also the conditioned air from inside the home. Emanates from air leaking to the attic from the enthusiasts, ceiling vents, lights, etc. Congrats to the neighbor for installing solar panels. https://rowanuxxwx.designertoblog.com/66179270/5-simple-techniques-for-solar-company-in-sriganganagar