Blower Door Testing is a fast and accurate way to measure a building's airtightness. By identifying hidden air leaks, it helps improve energy efficiency, reduce heating and cooling costs, enhance indoor comfort, and support energy code compliance. Ideal for new construction, renovations, and energy audits, blower door testing provides the data needed to create healthier, more efficient, and high-performing buildings. QED Lab Inc. delivers professional testing with precise results you can trust.