What type of air is supplied through the draft hood and helps to maintain a more constant draft pressure and to lower the temperature of chimney gases?
A) primary air
B) secondary air
C) exhaust air
D) dilution air
Correct Answer:
Verified
Q7: Which of the following are usually made
Q8: Which of the following is developed by
Q9: Which combustion control closes as soon as
Q10: When an appliance is _ vented, fresh
Q11: Which of the following is produced by
Q13: Which category of appliances are positive vent
Q14: Which of the following occurs when all
Q15: When does secondary air combine with gas?
A)before
Q16: Which category of appliances are nonpositive vent
Q17: Which category of appliances are nonpositive vent
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