LARK Labs TSSA G3 Exam Prep Resource Guide
HVAC Mobile Tools and Training | www.larklabs.org | lark_labs@outlook.com
Welcome
Welcome to your one-stop resource for preparing for the TSSA G3 Gas Technician Exam. This guide combines field-tested study tools, digital code access, and practical study tips—all organized to help you pass the G3 with confidence. All resources are selected for their quality, accessibility, and relevance to CSA B149.1 and B149.2 codes.
Table of Contents
- About the TSSA G3 Exam
- Essential Free LARK Labs Tools
- Premium LARK Labs Content
- External Free Resources
- Study Tips
- Contact & Support
1. About the TSSA G3 Exam
- Covers CSA B149.1 and B149.2 gas codes
- 24 core units: safety, tools, gas properties, codes, drawings, appliances, controls, customer relations, and more
- Designed for entry-level gas technicians in Ontario
- Code Compass (Gas Code Search Tool): Code Compass (FREE Ontario Regulations, CSA B149.1-25 and B149.2-25 Sections 1-4. Premium subscription unlocks full code search and AI explanations)
Search CSA B149.1 and B149.2 codes instantly. Print/copy code content for your notes.
- HVAC Pro Tools App: HVAC Pro Tools App (Free)
All-in-one calculators: heat/cooling load, superheat/subcooling, duct sizing, unit conversion, psychrometric analysis, P-T charts. Works offline for field and study use.
- CSA Gas Technician 3 Learning Modules: G3 Learning Modules (Free)
All 24 G3 units with handouts, quizzes, and code references.
- TSSA G3 Practice Exam: Free Practice Exam
Sample questions, instant feedback, explanations.
3. Premium LARK Labs Content (Optional)
4. External Free Resources
5. Study Tips
- Use Code Compass to look up code questions quickly
- Practice calculations with the HVAC Pro Tools App
- Take the free practice exam multiple times
- Study in short, focused sessions (30–45 min)
- Make summary notes for each unit
For help, feedback, or more resources:
Email: lark_labs@outlook.com
Website: www.larklabs.org