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Low Delta T

hrlevy
hrlevy Member Posts: 19
in THE MAIN WALL
I have just installed 2 old Fedders hot water unit heaters in my garage. I seem to get only a WDT of 5 degree. Could this be caused by the high of GPH flow.

If I lower the water flow will this raise the WDT??

Comments

  • kcopp
    kcopp Member Posts: 4,472
    need more...

    info... Unit btu ? Pipe size?  Length of run? Circulator size?
  • hrlevy
    hrlevy Member Posts: 19
    edited December 2012
    addl info

    Reznor 56K & older Fedders similar sized , 20' 3/4 pex to each unit, one Taco 00R 3speed set to low, water temp in 160F
  • Paul48
    Paul48 Member Posts: 4,469
    Universal Hydronic Formula

    http://www.youtube.com/watch?v=cDTuG3j04VM
  • Gordy
    Gordy Member Posts: 9,546
    edited December 2012
    Low delta t

    Could mean high flow.



    Could mean small supply return pipe size.



    Could mean poor heat transfer in the emitter itself



    Could mean warm room low delta between heated space, and emitter.



    Coiled mean poor heat transfer between emitter, and conditioned space (dirty fins coil ).
This discussion has been closed.

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