Question

​Which is true of a submerged heat exchanger?
a. ​It is used to extract heat from lakes and exchanges water directly with the lake.
b. ​It is used to extract heat from lakes and does not exchange water directly with the lake.
c. ​It is used to extract heat from the ground as part of a pressurized system.
d. ​It is used to extract heat from the ground as part of an unpressurized system.

Answer

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