Ductwork Leakage Testers

Ductwork leakage testers provide reliable, repeatable measurements that help quantify air loss through seams, joints, and fittings. For TAB teams, these instruments support air distribution performance verification, energy code documentation, and punch-list resolution before handoff. For service contractors, leakage testing can pinpoint sections that benefit most from sealing, helping prioritize work that supports comfort and energy savings.

How it works: A calibrated fan or flow element introduces air while the tester controls to a specified pressure class. The instrument records test pressure, flow, and time, then calculates leakage at the setpoint. Clear pass/fail criteria, based on project specifications or accepted methods referenced by SMACNA and ASHRAE, help close out work faster.

Key capabilities to look for:

• Automatic pressure control to reach and maintain test setpoints quickly
• Wide flow and pressure ranges to cover residential through large commercial systems
• NIST-traceable calibration with documentation for audit trails
• On-screen guidance for setup, test steps, and uncertainty notes
• App connectivity for labeling test sections, attaching photos, and generating PDFs
• Rugged housings, quick-connect hoses, and leak-resistant accessories for field use

Common applications:

• Commissioning new duct systems to project targets
• Verifying sections after sealing or repair
• Evaluating energy performance impacts of leakage
• Supporting IECC or project-specific documentation
• Testing exhaust, supply, and outside air runs

Best practices:

• Isolate sections carefully; plug registers and seal obvious openings before testing
• Stabilize pressure before recording results; follow dwell times consistently
• Document test conditions, section identification, and any deviations from the plan
• Communicate results with visuals to help stakeholders understand priority fixes

Selecting the right tester:

• Match flow and pressure capabilities to the largest sections you service
• Consider integrated automation to reduce manual adjustments and retests
• Prioritize data handling features that fit your reporting workflow
• Look for service and calibration support that aligns with your maintenance cycles

With the right leakage tester and workflow, TAB teams can validate performance, help reduce air loss, and provide clear records that support energy and comfort goals across a wide range of HVAC projects.