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Heat loss of 3/4\" copper pipe.

realolman
realolman Member Posts: 513
in THE MAIN WALL
you would be better off to install a boiler made for the purpose, with all the safety goodies, and some sort of an "a-coil" with a bunch of loops or branches in aluminum fins in the main duct.

Comments

  • Bill Longstreet
    Bill Longstreet Member Posts: 2
    heat loss 0n 3/4\" copper pipe

    I have an 1850sqft slab ranch built in 1958. i have an in door would bruner that makes hot water. i would like to hook this up to my domestic hot water add a buffer/storage tank. I have 8" ducts around the parimiter of my house and i want to run 3/4" copper in the ducts with a pump and thermostat. I would have two zones and they would start in the center of the house go to the end and than around. i have several vents in each room that i could use to control the heat that would rise. do you think I would get enough heat from the copper pipe? Should i go to a larger pige? The would burner provides heat for the garage and one end of the house now.I dont care if the pumps run all the time. I can provide a drawing if that would help.
    Thank you,
    Bill
  • Rich L.
    Rich L. Member Posts: 414
    heat loss

    The heat loss of 3/4" copper pipe with 70 degree surrounding air will be approximately 35 btu/ft with 160 degree water, 45 btu/ft with 180 degree water and 55 btu/ft with 200 degree water.

    Enough heat from the pipe? Good question. You need to do a heat loss on the house to tell how much heat you need. Also, is that duct insulated? If not that heat is going to go into the ground as well. Keep in mind heat doesn't rise, hot air rises. Heat travels to cool, regardless of the direction it needs to travel to get there.

    Larger pipe gives up more btu's/ft.

    I like the idea of adding a hydronic coil to your current air handler, but I give you credit for thinking "outside the box"!

    Good luck, Rich L.
  • Bill Longstreet
    Bill Longstreet Member Posts: 2


    Thank you for your help.I will look for a heat exchanger for my furnace. Is there a simple way to calculate the amount of base board that i would need to heat my house? if i can install base board i woul replace the furnace with a boiler that i could tie in to my wood burner.
    Thank You,
    Bill
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