Useful answers.
Understand the working.
Calculators and worksheets for the subjects you study and the problems you meet in practice. Work through an example, try your own values, then test the same ideas in exam practice.
Drying condition comparison
Compare affected, unaffected and outside air before explaining a structural-drying strategy. A cooler air sample with high relative humidity may still carry less water per mass of dry air.
Open tool →FREE TOOLDehumidifier GPP comparison
Compare simultaneous inlet and outlet humidity states around a dehumidifier. Explain grain depression independently of the rise in outlet temperature.
Open tool →FREE TOOLMeasured moisture removal calculator
Convert a measured humidity-ratio change and dry-air mass flow into water removal. Keep this short-term stream balance separate from advertised equipment capacity.
Open tool →FREE TOOLAirflow and ACH calculator
Relate a documented enclosure airflow to volume during a restoration exercise. Nominal air changes do not specify the number of air movers or establish containment performance.
Open tool →FREE TOOLDrying log builder
Build a repeatable job log that preserves material, meter mode and measurement location. Use comparable trends and environmental readings rather than treating every meter number as percent moisture.
Open tool →Tools that connect the calculation to the concept
Each tool shows its method, units and assumptions, together with two worked examples. Example values are for learning; replace them with your own measurements or documented inputs. The related study links take you to the matching certification topic on Restoration Cert Lab.
Worksheets run in your browser. We do not send entered measurements or report text to a calculation service. Where export is available, you choose when to save the file locally.
Check the boundary of the answer
A useful result starts with the right inputs and an appropriate method. These tools explain what is calculated and what the method leaves out. User-supplied criteria remain identified as supplied criteria; a calculation does not automatically approve equipment, certify an inspection or establish regulatory compliance.