How to use this result
Obtain the cost-per-open-hour assumption from facility energy data or a qualified energy analysis, then test operational scenarios.
Entered cost rate
The tool intentionally asks for a measured or professionally estimated cost rate rather than pretending to calculate building physics.
Payback
Simple payback ignores financing, maintenance and changing energy prices.
Important: This calculator does not model heat transfer, infiltration, refrigeration load or equipment performance. Do not use its defaults as an engineering estimate.