Engineering Tools Hub
Free, browser-based calculators designed to help Water Treatment Professionals and Facility Managers comply with ASHRAE 188.
Audit Exposure Simulator
Calculate your facility's ASHRAE 188, CMS QSO-17-30, and Joint Commission EC.02.05.02 Audit Risk Index (0–100) with citation forecasts and 1-click checklist export.
Legionella Risk Matrix
Interactive visualization of pathogen amplification risk based on water temperature, free chlorine residual, and pH.
LSI Calculator
Langelier Saturation Index tool to determine if your water is corrosive or scale-forming.
Flush Time & Water Age
Calculate the exact minutes required to flush a dead leg or pipe run to achieve total volumetric turnover.
Disinfection CT Calculator
Verify if your hyperchlorination achieves the required Concentration x Time (CT) for specific log-reductions.
Cooling Tower Blowdown
Calculate Cycles of Concentration (CoC), estimated evaporation loss, and required blowdown rates.
Hyperchlorination Dosage
Calculate the exact physical weight or volume of chemical required to hit a target ppm concentration.
Hot Tub & Pool Drainage
Calculate volume turnover rates and ASHRAE required drainage frequency for spas and pools.
Dialysis Carbon & RO Performance
Verify 4-hour carbon shift breakthrough limits (<0.10 ppm) and evaluate RO membrane % rejection and recovery.
ST91 Endoscopy Rinse & Drying
Verify AAMI ST91 AER final rinse water microbial limits and 10-minute medical air purge channel drying.