What is the purpose of fans in an HVAC system?
A. Draw outside air into the system.
B. Distribute air of the HVAC system.
C. Heat and cool air circulated in buildings.
D. Move smoke and heat if introduced into the system.
Correct answer is D. Move smoke and heat if introduced into the system. [HVAC fans and blowers are used to move air through heating, ventilating, and air conditioning (HVAC) systems. They are an integral part of the air handling systems that bring or draw fresh air into buildings.]
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