Complete Certification Study Guide
The Canadian Gas Technician Textbook is a comprehensive learning resource designed for students pursuing G2 and G3 certification through the Technical Standards and Safety Authority (TSSA) in Ontario, Canada.
This textbook covers all essential topics required for gas technician certification, including gas properties, piping systems, appliances, venting, electrical fundamentals, troubleshooting, and safety procedures.
Important: This textbook is intended to be used as a supplementary learning resource in addition to the official CSA Standard Units, CSA B149.1 (Natural Gas and Propane Installation Code), and CSA B149.2 (Propane Storage and Handling Code). Always refer to current CSA codes and standards for regulatory compliance.
Whether you're a student, apprentice, or experienced technician looking to upgrade your certification, this textbook provides the knowledge foundation you need to succeed.
Click any chapter below to download individual PDFs. All chapters are complete and ready for study!
All 20 chapters covering G3 and G2 certification requirements
Aligned with CSA B149.1-25 and B149.2-25 regulations
Complex concepts explained in plain, understandable language
Real-world applications and field-tested procedures
Structured to prepare you for TSSA G2 and G3 exams
Specifically written for Canadian gas technicians and regulations
Overview of natural gas and propane, industry structure, regulations, TSSA licensing, and career pathways for gas technicians
Essential math, units of measurement, conversions, basic physics, pressure, temperature, and calculations for gas systems
Natural gas and propane properties, combustion chemistry, BTU content, specific gravity, gas laws, and safety characteristics
CSA B149.1 (Natural Gas) and B149.2 (Propane), code navigation, installation requirements, and TSSA Act overview
Pipe materials (steel, copper, CSST), fittings, joining methods, support requirements, and proper installation techniques
Sizing calculations, pressure drop, load calculations, pipe capacity tables, and system design per CSA B149.1
Meter types, regulator operation (1st and 2nd stage), sizing, installation, testing, and overpressure protection
CSA B149.1 test requirements, testing procedures, acceptable pressure drop, purging methods, and documentation
Appliance categories, venting categories (I-IV), CSA certification, ratings, installation fundamentals, and clearances
Atmospheric and power burners, orifice sizing, ignition systems, flame sensing, and combustion analysis
Manual and automatic valves, safety shut-off systems, limit controls, pressure switches, and sequence of operations
Natural draft principles, venting materials (Type B, BW, PVC), system design, direct vent, and troubleshooting
Forced air furnaces, hydronic boilers, radiant heating, heat pumps, installation requirements, and commissioning
Electrical theory (Ohm's Law), safety, multimeter use, control circuits, thermostats, and reading wiring diagrams
Control logic (on-off, staged, modulating), heating sequences, zone controls, and advanced building controls
Storage tank and tankless heaters, components, installation requirements, sizing, T&P relief valves, and troubleshooting
Cooking appliances, dryers, fireplaces, pool heaters, unit heaters, construction heaters, and infrared heaters
Propane system design, DOT/TC tank specifications, regulators, appliance conversion, and storage per CSA B149.2
Systematic troubleshooting approach, diagnostic tools, common problems, gas supply issues, and control failures
Preventive maintenance programs, furnace/water heater/boiler service, combustion testing, and maintenance contracts