Free Tools & Knowledge for HVAC Technicians

HVAC Admin - Free Tools & Knowledge for Technicians

Calculators, Parts Database, Certification Prep & More. Built for field work and fast decisions.

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Free Tools

HVAC tools you can use today

Try workflows and calculators without logging in.

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Workflow

Invoice Generator

Create professional invoices with line items, taxes, and customer-ready totals.

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Workflow

Parts Database

Search compatible parts by brand, model, and replacement cross-references.

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Workflow

Job Calendar

Plan service visits, track jobs, and keep your week organized.

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Calculator

BTU Calculator

Estimate cooling capacity for any room with fast field inputs.

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Calculator

Charge Calculator

Superheat and subcooling calculations for precise system charging.

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Calculator

Duct Calculator

Determine duct size based on CFM and friction rate.

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Knowledge Hub

Technical knowledge organized by task

Short, practical answers for field decisions.

Refrigerants

Specs, replacements, pressure charts, and safety notes.

Capacitors

Sizing, testing, replacement guidance, and common failures.

Troubleshooting

Symptom-to-fix guides for fast diagnostic workflows.

HVAC Tools

Tool selection, usage tips, and field checklists.

HVAC Filters

HVAC filter types, MERV ratings, and replacement cycles.

Certifications

Global certification prep

Start with EPA 608 and track upcoming global programs.

Available now

EPA 608 (USA)

Study guides, practice tests, and exam breakdowns.

Coming soon

F-Gas (EU)

EU refrigerant handling requirements and certification basics.

Coming soon

ARCtick (Australia)

Australian refrigerant handling license overview.

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Parts searched

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