COMING AUGUST 2026
TAB Toolbox
The Complete Field App for Test & Balance Professionals
Built by a TAB technician, TAB Toolbox brings every airflow, hydronic, psychrometric, and heat-transfer calculation you need directly to your phone or tablet — right on the job site, without the spreadsheets and paper worksheets.
Purpose-Built for HVAC Balancing Work
TAB Toolbox replaces clunky spreadsheets, printed forms, and multiple standalone calculators with a single, field-ready mobile app designed around real industry balancing procedures.
Ductwork Traversal & Airflow
Run velocity traverses, calculate CFM, and log duct dimensions on-site without pulling out a calculator or paper log sheet.
Psychrometric Analysis
Instantly calculate enthalpy, wet bulb, dew point, and sensible/latent split from field readings for coil and system diagnostics.
Hydronic System Balancing
Calculate GPM from pressure drop, pump curves, and fan/pump laws to balance chilled and hot water systems accurately.
Heat Transfer & Coil Performance
Verify coil capacity against design specs using field temperature and flow data to catch underperforming equipment early.
Fan & Pump Laws Calculator
Quickly calculate the effects of speed, diameter, and density changes on airflow, pressure, and horsepower using fan and pump affinity laws right in the field.
Instant Data Sharing
Once you've run your calculations, TAB Toolbox lets you copy your results directly to the clipboard and send them anywhere — no retyping, no re-entering numbers into another app. Just tap "Copy," then paste your readings straight into a text message or email to your PM, engineer, or client from the job site. It's a faster, more reliable way to communicate field data than reading numbers off a screen or scribbling them on paper, and it cuts down on the transcription errors common with manual reporting.
See TAB Toolbox in Action
A closer look at the tools and screens technicians use every day in the field.
Why TAB Technicians Choose TAB Toolbox
- No more juggling spreadsheets, PDFs, and physical calculators on a job site.
- Built by a working TAB technician who understands real field conditions.
- Speeds up testing of AHUs, FCUs, and chilled water systems.
- Reduces calculation errors that lead to callbacks or failed balance reports.
- Works on both iOS and Android for flexibility across your team's devices.
- Keeps standard formulas consistent across every technician on the job.
Bring Precision to Every Balancing Job
Download TAB Toolbox and take the guesswork out of field calculations.