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Fan Coil lowest hot water entering temperature

Fan Coil lowest hot water entering temperature

Fan Coil lowest hot water entering temperature

(OP)
What is the lowest hot water entering temperature which is reasonable for a fan-coil and why?

RE: Fan Coil lowest hot water entering temperature

Ohh, ohh, I'll play.

The lowest reasonable entering water temperature is the surrounding air temperature.  Because if it's colder it stops being a heater.

RE: Fan Coil lowest hot water entering temperature

On LEED buildings I tend to provide 140 EWT, but I did a two pipe system for a dormitory as low as 110 EWT.  As long as your coil can meet the load of the space, then from an energy standpoint, the lowest you can go the better.   

knowledge is power

RE: Fan Coil lowest hot water entering temperature

140 EWT is a good number.  It allows the boiler to work as efficiently as possible (if it's condensing) you can put a larger delta T on the coil, and that in turn can decrease the size required for the circulating pump.

Lower water temperature can be done, but why?  Max out the boiler efficiency.

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