Which of the following is NOT a hydronic heating system?
a. Loop system
b. One pipe system
c. Two pipe direct return system
d. Two pipe reverse return system
e. A wet-return system
Answer: E
Which of the following is NOT a hydronic heating system?
a. Loop system
b. One pipe system
c. Two pipe direct return system
d. Two pipe reverse return system
e. A wet-return system
Answer: E