YOu live in Michigan right? Cold winters and hot summers... I recently bought and HRV from pexsupply.com...It will work great in the winter time to draw the humid air out and bring fresh air...and at the same time heat the incoming air while exhausting the warm humid air.....
but...and it is a big one....in the summer time when it gets hot out......you will be drawing in humid air....most people dont run the air exchanger in the summer time or very little...the key is air movement by use of fans and unfortunately the darn dehumidifier.....but if you have a central air system like I do in my house......which I use in the summer time...that will also draw out the humidity in the house as well. another thing to consider is ...installing a bathroom exhaust fan...but be careful when doing this too...you dont want to create negative air pressure..
Hope this all makes sense and helps you out. Oh and one more thing.....I only hooked up my HRV air exchanger in my fishroom only and did not hook it into the central HVAC system of the house.