Modern codes and green certification programs require whole-building air leakage testing. This article explores test standards, common setups, and tools for commercial air barrier testing.
Overview
Air barrier testing evaluates how much air moves through a building’s envelope under pressure. Typical procedures follow ASTM E779 for large buildings and may involve multi-point blower door setups. Testing must be planned during design and conducted by qualified technicians.
Test Equipment and Process
- Use calibrated blower door fans and pressure sensors
- Measure at 75 Pa and convert to CFM/sf or L/s·m²
- Temporarily seal HVAC intakes and mechanical penetrations
- Monitor results for local hot spots indicating envelope leaks
🔍 Quick Picks
- Commercial Blower Door System: Retrotec Blower Door System
- Pressure Gauge Kit: DG-1000 Pressure Sensor
- Air Sealing Tape: 3M All Weather Flashing Tape
Conclusion
Air leakage testing is now a standard requirement in many codes and rating systems. Proper planning, equipment calibration, and envelope design coordination are key to passing these tests.
Disclosure: As an Amazon Associate, EnvelopeIQ earns from qualifying purchases.
Challenges and Failure Points
Common reasons buildings fail air barrier tests include unsealed utility penetrations, poor sequencing at window openings, and inconsistent wall-to-roof transitions. Identifying leakage paths often requires infrared thermography or tracer smoke. Testing early allows time to fix issues before finishes cover critical details.
