Construction Products, Windows, Doors & Fenestration worked example

IGU Gas Fill Cost at 110% share of fills charged to this run: a worked example

What does the result look like when share of fills charged to this run reaches 110%? The full calculation is worked below with real intermediate numbers. costing gas-filled IGU options and energy packages

The inputs for this scenario

  • Insulating glass units gas-filled: 155 IGUs (unchanged)
  • Argon/krypton fill cost per IGU: 7.8 $ / IGU (unchanged)
  • Share of fills charged to this run: 110 % (raised for this scenario; the documented default is 100)
  • Fixed gas line setup and fill-rate verification adder: 240 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable IGU gas fill cost = gas-filled IGUs × gas fill cost per IGU × gas fill scope included) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,570 $ for total igu gas fill cost, the number this scenario is built around.
  • At this operating point the engine returns 10.13 $ / piece for gas fill cost per igu.
  • At this operating point the engine returns 1,330 $ for variable gas fill cost.
  • At this operating point the engine returns 240 $ for fixed gas setup and verification adder.

How this compares with the baseline

  • Against the tool's baseline example, where share of fills charged to this run sits at 100% and the headline result is 1,449 $, this scenario comes in 8.34% above the baseline at 1,570 $.
  • A figure at this level is achievable when share of fills charged to this run is genuinely sustained, not just peaked for a shift. It assumes a single average cost per IGU; krypton-filled and triple-pane units cost far more per fill than standard argon double-panes and should be modeled separately.

Results at a glance

  • total IGU gas fill cost: 1,570 $ (headline result)
  • gas fill cost per IGU: 10.13 $ / piece
  • variable gas fill cost: 1,330 $
  • fixed gas setup and verification adder: 240 $

Run it with your numbers

  • Every input above is editable in the live IGU Gas Fill Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.