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Sterling design line series baseboard ?

pipe4zen Member Posts: 108
I have a project that specs Sterlings' designline baseboard in all rooms. This heavy gauge

enclosure and slim profile has specs of 350 btuh @ 180 supply temperatures @ 1gpm. The baseboard has 1/2" elements with fins.

I want to run 1/2" pex to the baseboards, but my longest run is 40 feet. I should be ok, but not sure if 40 feet to long for the 1/2" elements. My option would be to break up the lengths or upsize the tubing. Any input much appreciated.
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