HVAC Ductwork, Air Handling & Mechanical Products calculator
Duct Leak-Test Pass Rate Calculator
Measure the share of duct sections passing their leakage test. Enter passed and tested counts plus the reporting target.
What this calculator does
- Measure the share of duct sections passing their leakage test.
Formula used
- Acceptance % = Accepted items × 100 ÷ Tested items
- Not accepted = Tested items − Accepted items
- Target shortfall = Target % − Acceptance %
Inputs explained
- Passed Duct Sections: Accepted items from the completed inspection record.
- Tested Duct Sections: All items assessed under the same acceptance procedure.
- Acceptance Target: Required acceptance percentage for this reporting period.
How to use the result
- Best suited to inspection trend reviews, acceptance target checks.
- This does not set a test pressure, leakage class or acceptance specification.
Current U.S. benchmarks
- Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
- U.S. housing starts run at 1,275k per year (Census, Aug 2026), down 1.2% from a year earlier, the demand driver for building products.
Common questions
- Can this calculate physical leakage? No. It measures accepted item counts; measured leakage requires its own physical test result.
- Should retests be counted again? Choose one documented population basis and use it consistently in both counts.
- Why must tested count be positive? An acceptance percentage is undefined when no items were tested.
- Can I use this as a quality guarantee? No. It summarizes the recorded population and does not predict every future item.
Last reviewed 2026-10-12.