Hello,   I am in the very early stages of designing and building a passive house, based on the closed panel prefabrication method as used by construction companies such as PYC. I've been thinking about how the house is to be furnished internally and the implications of attaching heavy furnishings to the internal faces of exterior super insulated walls, either for stability in the case of fitted wardrobes etc or the suspension of wall cabinets and even TVs. These walls, I understan