Understand the distinction
Homes can have different ventilation arrangements, and their requirements depend on the building and equipment. A general energy-saving suggestion should not encourage blocking an opening or overriding a system. Comfort and air exchange need appropriate technical context.
Put it in your home notes
Identify the user manual or professional report describing your home’s arrangement. Ask a qualified specialist about problems and planned alterations. Do not seal vents or change combustion-appliance ventilation on the basis of this journal; it supplies terminology and record-keeping ideas, not modification instructions.