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Académie
HVAC
NATE Hydronics Gas Service Specialty
Radiant Floor Heating
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Radiant Floor Heating
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In a primary/secondary piping arrangement for a multi-zone radiant floor system, how does the primary loop circulator operate relative to zone calls?
A
It runs continuously through the boiler regardless of which secondary zones are calling
B
It cycles on and off with each zone call to conserve energy
C
It only runs when at least two zones are calling simultaneously
D
It modulates speed based on the number of active zone calls
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