A privacy-first, zero-dependency suite of offline-capable trade calculators for electrical, HVAC, plumbing, and construction professionals, delivering deterministic field math through a lightning-fast, ad-free static web interface.
construction pwa offline-first vanilla-javascript static-site carpentry calculators hvac trades electrical-engineering plumbing reference-material engineering-tools zero-dependencies privacy-focused no-tracking math-tools construction-tech field-math fire-ground-engineering
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Updated
May 8, 2026 - JavaScript