Forums > Green Building Technologies > Radiant Heating

Velocity of fluid in radiant tubing

Last Post 07 Nov 2009 09:27 PM by jonr. 2 Replies.

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Glen W

New Member

Posts:11

05 Nov 2009 12:35 AM
Is their an ideal flow rate or should I just measure EWT and LWT . of 250’ half inch pex loops?

NRT.Rob

Advanced Member

Posts:823

05 Nov 2009 08:33 AM
what are you trying to do? typically, a temperature drop across the loop of 10 to 30 degrees is used, with 20 being an arbitrary residential max. however, supply temperature restrictions/requirements, balancing between zones might change the flow rates you are looking to achieve.

-=Northeast Radiant Technology=- NRTradiant.com

jonr

Advanced Member

Posts:561

07 Nov 2009 09:27 PM
Thermally, more flow is better and I wouldn't cause any flow restriction that wasn't required for balancing.

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