Gas Trade Unit 21: Space Heaters & Fireplaces

TSSA G2 Certification - Practice Questions & Chapter Reviews

📋 Certification Level: TSSA G2 (Gas Technician 2 - Intermediate)
⚠️ Prerequisites: G3 Certification + 2 Years (4,000 hours) Experience

Master Gas Trade Unit 21 with free CSA B149.1-25 compliant practice questions for the TSSA G2 certification exam. This unit covers space heaters, gas fireplaces, and installation requirements for space heating appliances.

📖 What This Unit Covers

Gas Trade Unit 21 focuses on space heaters and fireplace systems:

  • Chapter 1: Space Heaters - Vented and unvented space heater types and installation
  • Chapter 2: Fireplaces - Gas fireplace systems and installation requirements

🎯 TSSA G2 Exam Relevance

CSA Code Reference: CSA B149.1-25 Section 9 (Space Heating Appliances)

Exam Coverage: Space heater and fireplace topics appear in approximately 10-14% of G2 exam questions.

💡 Study Tips for Unit 21

  • Understand different space heater types and their installation requirements
  • Master gas fireplace venting and clearance requirements
  • Learn unvented appliance restrictions and oxygen depletion sensor requirements
  • Study appliance-specific installation clearances and combustible protection
  • Review gas log set requirements and conversion restrictions

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Unit 22: Venting Systems

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📖 Study CSA B149.1-25 Code

Deep dive into CSA B149.1-25 requirements for G2 level installations.

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📚 Additional G2 Study Resources

⚠️ Educational Resource Disclaimer: This practice test is an independent educational resource designed to help students prepare for the TSSA G2 certification exam. These materials are based on CSA B149.1-25 requirements but are not official TSSA materials. G2 certification requires G3 prerequisite plus 2 years (4,000 hours) documented experience. Always refer to the official CSA B149.1-25 code and current TSSA guidelines for authoritative information. LARK Labs is not affiliated with TSSA or CSA Group.