Air conditioning systems in homes and small commercial buildings are often connected to the heat system and use the same vents and ducts. Why might this be the case?
Answer
A
Most buildings run air conditioning and heat at the same time.
B
It is often more economical for these systems to share the same ductwork.
C
Hot air rises to the upper part of the ducts while cold air sinks to the bottom part.
D
Both cold air and hot air exhibit the same behavior due to the stack effect.