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Circulator Sizing

rox
rox Member Posts: 23
in THE MAIN WALL
Ok, from everything Ive read here it seems that a typical zone made up of 3/4" baseboard with roughly 65' of actual baseboard in the loop (so about 40 MBH at 180 degrees) would need 4-5 GPM rate of flow. Taco 007's which seem to be the one size fits all circulator 17 GPM at 3 1/2 ft of head. Seems like its too much flow. Am I missing something?

Comments

  • rox
    rox Member Posts: 23


    Never mind! I went to the Taco site, printed out their spec sheet and used the online circulator sizer. It all makes sense now. In fact, an 007 is too small for my second floor, I should have an 0010.
  • steve b_2
    steve b_2 Member Posts: 1
    .

    I'm not an expert, just an interested homeowner.I hope that I've got this right -if I don't I'm sure somebody will set me straight.

    You may be missing something, it's hard to tell from the information you provide.

    When you say that your second floor requires a much larger circulator than an 007 I hope that you are correctly figuring the effective head that the circulator must overcome. The effective head used in sizing a circulator is the resistance of the circuit to the flow of water, which in turn is a function of the number and kinds of fittings in the circuit and the length of the piping. The height of the second floor doesn't enter into the calculation. The water pressure required to provide water to the top floor isn't provided by the circulator but by the system pressure -typically 15-20 psi or so?
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