I work as a TAB (Testing, Adjusting, and Balancing) Technician in the HVAC industry.
One of the biggest pain points in the field is doing repetitive math for duct traverses while standing on a ladder. The standard industry formulas (NEBB/AABC) aren't complicated, but doing them on a phone calculator leads to human error.
The Problem Existing apps are either expensive, require a login (impossible in dead zones), or are filled with ads.
The Solution I decided to build my own lightweight tool using React. It's a simple PWA (Progressive Web App) that handles:
Round Duct Traverses (Log-Tchebycheff method)
Rectangular Duct Grids
Zero data collection
The Stack
Frontend: React
Hosting: Netlify/Lovable
Logic: Custom JS for the fluid dynamics formulas.
You can try the live demo here: TestAndBalance.xyz
I'm currently working on a Python script to take these inputs and auto-generate the PDF reports we send to clients.
If you are in the trades and interested in how automation can help field work, check out my other projects at DyamiConnell.com.
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