Cleanroom & Contamination Control worked example

Cleanroom Energy Cost at 94% share of energy allocated to this room or program: a worked example

Push share of energy allocated to this room or program up to 94% and the picture changes. This example computes every intermediate figure at that operating point. a team needs to compare airflow setpoints, operating schedules, and energy-saving changes for a monthly cleanroom energy period

The inputs for this scenario

  • Cleanroom HVAC and fan energy use: 125,000 kWh (unchanged)
  • Electricity rate for cleanroom service: 0.14 $ / kWh (unchanged)
  • Share of energy allocated to this room or program: 94 % (raised for this scenario; the documented default is 82)
  • Fixed demand, metering, or service charge: 2,400 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable cleanroom energy cost = cleanroom HVAC and fan energy use × electricity cost for cleanroom service × energy assigned to this room, suite, or production program) to the inputs above produces each figure below.
  • At this operating point the engine returns 18,850 total cleanroom energy cost for total cleanroom energy cost, the number this scenario is built around.
  • At this operating point the engine returns 0.15 $ / piece for energy cost per kwh.
  • At this operating point the engine returns 16,450 $ for variable cleanroom energy cost.
  • At this operating point the engine returns 2,400 $ for fixed demand, metering, or utility service charge.

How this compares with the baseline

  • Against the tool's baseline example, where share of energy allocated to this room or program sits at 82% and the headline result is 16,750 total cleanroom energy cost, this scenario comes in 12.54% above the baseline at 18,850 total cleanroom energy cost.
  • It computes the total cleanroom electricity cost by multiplying metered HVAC and fan energy by the electricity rate and the allocation share, then adding fixed demand and service charges. 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

  • Total cleanroom energy cost: 18,850 total cleanroom energy cost (headline result)
  • Energy cost per kwh: 0.15 $ / piece
  • Variable cleanroom energy cost: 16,450 $
  • Fixed demand, metering, or utility service charge: 2,400 $

Run it with your numbers

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

Last reviewed 2026-05-12.