HVAC Ductwork, Air Handling & Mechanical Products worked example

Air Handler Coil Capacity at 99% assembly line uptime: a worked example

Push assembly line uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use this when production planning for air handling unit assembly and you need to know whether your coil brazing, leak testing, and coil-in-casing assembly stations can meet a delivery commitment. Adjust uptime and yield to reflect actual station performance rather than nameplate capacity.

The inputs for this scenario

  • Coil assemblies built per setup: 4 coils / setup (unchanged)
  • Available setups per shift: 60 setups (unchanged)
  • Assembly line uptime: 99 % (raised for this scenario; the documented default is 90)
  • First-pass coil assembly yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross coil capacity = coils per setup × available setups) to the inputs above produces each figure below.
  • At this operating point the engine returns 230 units for good output capacity, the number this scenario is built around.
  • At this operating point the engine returns 240 units for gross capacity.
  • At this operating point the engine returns 2.4 units for uptime loss.
  • At this operating point the engine returns 7.13 units for yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where assembly line uptime sits at 90% and the headline result is 210 units, this scenario comes in 10% above the baseline at 230 units.
  • It computes deliverable coil output by taking gross capacity (coils per setup times setups) and applying line uptime and first-pass yield percentages. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Good output capacity: 230 units (headline result)
  • Gross capacity: 240 units
  • Uptime loss: 2.4 units
  • Yield loss: 7.13 units

Run it with your numbers

  • Every input above is editable in the live Air Handler Coil Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.