Gas Trade Unit 23: Indoor Air Quality (Forced Air Add-Ons)

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 23 with free CSA B149.1-25 compliant practice questions for the TSSA G2 certification exam. This unit covers indoor air quality equipment including air filters, humidifiers, and cooling coils integrated with forced air systems.

📖 What This Unit Covers

Gas Trade Unit 23 focuses on indoor air quality and forced air add-on equipment:

  • Chapter 1: Air Filters and Cleaners - Filter types and installation
  • Chapter 2: Humidifiers - Humidifier types and installation requirements
  • Chapter 3: Cooling Coils - Air conditioning integration with gas heating

🎯 TSSA G2 Exam Relevance

CSA Code Reference: CSA B149.1-25 Section 7 (Ventilation and Air Quality)

Exam Coverage: Indoor air quality topics appear in approximately 8-12% of G2 exam questions.

💡 Study Tips for Unit 23

  • Understand different air filter types and MERV ratings
  • Master humidifier installation and water supply requirements
  • Learn cooling coil integration with forced-air systems
  • Study airflow impacts of IAQ equipment additions
  • Review humidifier maintenance and water quality considerations

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📖 Related Gas Trade Training Units

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Unit 22: Venting Systems

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Unit 24: Heat Loss/Heat Gain & Air Handling Units

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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.