I got this question below and can’t find anything on the answer D
A designer is planning on using a hydronic distribution system to heat a bldg and needs to decide which type of system will be best for efficiency and comfort control. To this end the designer plans on supplying equal flow and fluid temp to each radiator to yield an efficient return. Which type is most likely to achieve best results?
A one pipe syste
B two pipe direct return system
C two pipe reverse return system
D series perimeter loop system
Answer is d but I can’t find any info on b, c,d only on a
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