Set some ground rules to manage your expectations. Both of you need to be clear with what you expect of with each other during this long distance relationship. Set some ground rules so that none of you will do things that will take the other party by surprise.
As air is pulled from the attic space by the turbine vent, ridge vent or even an electric powered fan, the same amount of air must be allowed to flow into the attic space where the roof passes over the exterior walls of the home.
*. Two fans can share common exhaust duct and a roof or wall cap. Most, if not all ceiling exhaust fans come with a backdraft damper on the outlet. Make sure the ones you install have these.Just have to make sure the ducts are big enough. 2-4ducts into a 6 for 50 cfm fans, 2-6 into an 8 for 100 cfm fans.. Two fans can share common exhaust duct and a roof or wall cap. Most, if not all ceiling exhaust fans come with a backdraft damper on the outlet. Make sure the ones you install have these.