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NATE Gas Heating Air Exam

QUESTIONS & ANSWERS Dec 16, 2025 ★★★★★ (5.0/5)
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Document Text

NATE Gas Heating (Air) Exam ( Update 2026 / 2027) Questions & Answers

Question:

What are the two types of Direct burner ignition

Answer:

Hot surface and spark

Question:

What are the primary characteristics that determine flame stability

Answer:

Gas flow velocity and Burning speed

  • / 2

Question:

Category I Furnace

Answer:

is a negative pressure venting non-condensing furnace, flue gas temp is atleast 140F and above

Question:

Category II furnace

Answer:

is a negative pressure venting condensing corrosion resistant furnace, flue gas temp is under 140F

Question:

Category III furnace

Answer:

Air tight, positive flue pressure , sealed combustion, temp over 140°f , inducer motor

  • / 2

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Category: QUESTIONS & ANSWERS
Added: Dec 16, 2025
Description:

NATE Gas Heating (Air) Exam (Latest Update) 100% Verified Questions & Answers | Grade A Question: What are the two types of Direct burner ignition Answer: Hot surface and spark Question: What are t...

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