Fresh ventilation can prevent common bathroom design mistakes that lower value by controlling moisture buildup and reducing mold risks. Inadequate exhaust fans allow humidity to linger, damaging finishes and triggering buyer concerns. Installing or maintaining a powerful, well-placed fan ensures air circulation, preserves paint and fixtures, and signals good home care. This simple upgrade reduces inspection objections, maintains bathroom freshness, and enhances the overall sense of cleanliness and quality, which directly correlates with stronger resale offers and fewer repair negotiations.