Cleanroom & Contamination Control worked example

Cleanroom Humidity Control Cost at 87% hours requiring active humidity control: a worked example

Push hours requiring active humidity control up to 87% and the picture changes. This example computes every intermediate figure at that operating point. a team needs to compare humidity setpoints, seasonal operating plans, and control-system maintenance needs for a controlled humidity period

The inputs for this scenario

  • Humidity-controlled cleanroom hours: 720 room-hr (unchanged)
  • Humidity control cost per hour: 42 $ / room-hr (unchanged)
  • Hours requiring active humidity control: 87 % (raised for this scenario; the documented default is 76)
  • Fixed sensor calibration, desiccant, steam, or service cost: 5,100 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable humidity-control operating cost = humidity-controlled cleanroom hours × humidity control cost per hour × hours requiring active humidity control) to the inputs above produces each figure below.
  • At this operating point the engine returns 31,409 total cleanroom humidity control cost for total cleanroom humidity control cost, the number this scenario is built around.
  • At this operating point the engine returns 43.62 $ / piece for humidity control cost per room-hour.
  • At this operating point the engine returns 26,309 $ for variable humidity-control operating cost.
  • At this operating point the engine returns 5,100 $ for fixed sensor calibration, desiccant, steam, or service cost.

How this compares with the baseline

  • Against the tool's baseline example, where hours requiring active humidity control sits at 76% and the headline result is 28,082 total cleanroom humidity control cost, this scenario comes in 11.85% above the baseline at 31,409 total cleanroom humidity control cost.
  • It computes total humidity control cost as room-hours x cost per hour x the share of hours under active control, plus fixed sensor calibration, desiccant, steam, and service cost. 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 humidity control cost: 31,409 total cleanroom humidity control cost (headline result)
  • Humidity control cost per room-hour: 43.62 $ / piece
  • Variable humidity-control operating cost: 26,309 $
  • Fixed sensor calibration, desiccant, steam, or service cost: 5,100 $

Run it with your numbers

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

Last reviewed 2026-05-12.