I did not end up putting a passive vent in. Our master bedroom is right beside the stove room more or less .....so keeping the doors open is all we do and it works well. We run both the main fan within the unit and the remote duct fan into the basement at the same time often... I would consider looking into a 3rd party remote duct fan if your planning on this application. The oem is noisier than it needs to be imo. Maybe if you posted some sort of floor plan of what your thinking I could give you some ideas of what to expect. Also what the insulation and sealing will be like in your new home. I will say that I think you will be happy with a fp30 as ours has heated our entire home comfortably (74ish) and solely. Our propane furnace does not run at all unless we make it run intentionally. With good insulation it will work great.Checking in, how is your design performing? Did you end up ducting air form a different room for circulation? I'm working on a similar plan (3200sqft Ranch w/ partial walkout basement), looking to maximize heat circulation in winter. What did you put into your design to evenly heat the house and distant rooms? Cheers!