Five AI tools, built to run our own shop.
L&L designs mechanical and plumbing systems — and builds the software that handles the work no one should be doing by hand. One of them grew into a product.
RedlineQA
Reviews HVAC and plumbing plan sets one sheet at a time, then runs a second cross-sheet pass to catch tag mismatches, schedule conflicts, and the discrepancies a single read always misses — before anything goes out for stamp.
Shop Material Tracking
Add or pull inventory by voice, text, or photo. The AI reads whatever you hand it and updates the database itself — no forms to fill, no spreadsheet to babysit.
Invoice Processing
Gemini reads every incoming invoice PDF, extracts the full detail, and writes it into one central Google Sheet — a stack of PDFs turned into structured data, automatically.
Timesheet App
A web-based app that keeps field and shop hours in one place — logged from anywhere, ready the moment payroll runs.
Receipt Capture
Pick the active job, snap the receipt, and Gemini pulls the vendor, amount, and details — captured against the job and ready for the books.
Built by people who do the work.
Engineering design, plumbing in the field, and the back office in between — not a software shop. Which is the point. The hard part was never the model. It was knowing which problems were worth solving, and that came from doing the work.
Run a small business in the trades or engineering? If you’re wondering where AI actually fits, that’s the conversation worth having.
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