Duct Leakage Testing

Measured HVAC performance

Duct Leakage Testing Duct-Blaster Verification for Residential Projects

Tacoma Energy provides duct-leakage testing to measure air loss through HVAC distribution systems, document compliance, and help builders verify that installed ductwork meets applicable project and program requirements.

01

Measured Leakage

Calibrated testing measures air escaping through duct connections, seams, boots, plenums, and other parts of the distribution system.

02

Compliance Verification

Results can support energy-code requirements, ERI programs, certifications, builder standards, and final project documentation.

03

System Performance

Reduced duct leakage helps deliver conditioned air where it is intended and supports more predictable HVAC operation.

Test the system. Verify the installation. Duct-leakage testing converts distribution-system performance into a documented value for compliance, quality assurance, and project closeout.
Why duct leakage matters

The Potential Cost of Uncontrolled Air Loss

The figures below preserve the examples previously presented on this page while organizing them into a clearer, more useful format.

20–30% Potential conditioned-air loss Previously cited range for air lost through leaking duct systems.
975 kWh Example monthly household electricity use Retained from the original page’s illustrative calculation.
30% Previously cited average duct leakage Presented as an illustrative industry figure.

Illustrative Leakage-Volume Example

216,000 Cubic feet of conditioned air per day
78,840,000 Cubic feet of conditioned air per year
Put the volume in perspective

One day of illustrative leakage equals the indoor air volume of a typical 2,000-square-foot home more than 13 times.

216,000 Cubic feet of conditioned air per day
16,000 ft³ Indoor volume of a 2,000 sq. ft. home with 8-foot ceilings
13.5× Equivalent whole-home volumes per day Approximately 4,900 whole-home volumes per year

Visual comparison assumes a 2,000-square-foot conditioned home with uniform 8-foot ceilings. It compares total volume only and does not represent the measured air-change rate of a specific home.

These values represent the original page’s example calculation using 10% duct leakage. Actual leakage and energy impact vary by home, system, operating conditions, climate, and construction quality.

Testing Applications

Testing scope and timing are coordinated around the construction stage and applicable project requirements.

Rough-in duct testing Testing completed before drywall or final finishes when required by the project’s compliance path.
Final duct-leakage testing Verification of the completed HVAC distribution system for code, certification, or builder requirements.
Retesting and verification Follow-up testing after corrective work when required by the project scope.

Coordinated Testing Process

Tacoma Energy coordinates scheduling, field testing, measured results, and final documentation through one accountable workflow.

01
Project requirements confirmed Testing stage, leakage target, system count, and documentation needs are reviewed before the visit.
02
Duct system tested The system is prepared and tested using calibrated duct-blaster equipment and standardized procedures.
03
Results documented Measured leakage and applicable records are prepared for the builder and compliance team.
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