Industrial Heat Pumps & Electrified Thermal Systems worked example

Leak Test Workload at 35% evacuation, stabilization, and retest allowance: a worked example

What does the result look like when evacuation, stabilization, and retest allowance reaches 35%? The full calculation is worked below with real intermediate numbers. Use it when a quality engineer or production planner needs to load helium, nitrogen, vacuum hold, or hydro test resources for heat pump circuits, coils, or packaged skids.

The inputs for this scenario

  • Circuits or assemblies to leak test: 60 assemblies (unchanged)
  • Leak tests completed per hour: 6 assemblies / hr (unchanged)
  • Evacuation, stabilization, and retest allowance: 35 % (raised for this scenario; the documented default is 30)

Working through the calculation

  • Applying the documented formula (Base leak test workload = circuits or assemblies to leak test รท leak tests completed per hour) to the inputs above produces each figure below.
  • At this operating point the engine returns 13.5 hr for required leak test workload, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base leak test workload.
  • At this operating point the engine returns 35 % for evacuation, stabilization, and retest allowance.
  • At this operating point the engine returns 6 pieces / min for leak tests completed per hour.

How this compares with the baseline

  • Against the tool's baseline example, where evacuation, stabilization, and retest allowance sits at 30% and the headline result is 13 hr, this scenario comes in 3.85% above the baseline at 13.5 hr.
  • A figure at this level is achievable when evacuation, stabilization, and retest allowance is genuinely sustained, not just peaked for a shift. The allowance is a single average percentage, so a batch with an unusual cluster of leakers or a deep-vacuum requirement can blow past the planned hours.

Results at a glance

  • Required leak test workload: 13.5 hr (headline result)
  • Base leak test workload: 10 hr
  • Evacuation, stabilization, and retest allowance: 35 %
  • Leak tests completed per hour: 6 pieces / min

Run it with your numbers

  • Every input above is editable in the live Leak Test Workload calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.