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  1. Replies
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    Perhaps he is in a region where freezing is not a...

    Perhaps he is in a region where freezing is not a concern.
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    Not sure what it is for, but I have seen it used...

    Not sure what it is for, but I have seen it used in radiant heat systems. http://www.youtube.com/watch?v=vPfaKGKqq9s
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    combination hot water and radiant heat?

    I have seen 2 types of Hydronic radiant heat systems.
    "closed looped" and "shared water".

    1. "closed looped" Water circulates from boiler to thepex coils and back under little or no pressure. ...
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    Do hydronic systems need to be flushed?

    Do closed loop hydronic radiant heat systems need to have there water replaced every five years or so?
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    491

    Assume space temperature is identical above and...

    Assume space temperature is identical above and below. 65*.
    And lets say the floor assembly is R4 including carpet pad etc.
    And assume the ceiling is R1 including drywall.
    Assume the cavity...
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    Lets say the pex is suspended in the center of ...

    Lets say the pex is suspended in the center of the floor/ceiling joists. Above it is plywood carpet and 1/2" padding . Below it is 1/2" drywall.

    1. Would you expect the heat to mostly go...
  7. Replies
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    Radiant Heat Between Flores

    When hydronic radiant heat (Pex) is installed between the first and second floor in wood construction , , ,

    What % of the heat goes to the lower floor?

    Would you expect it to be 50/50 or (80...
  8. A. I was considering special plywood which has...

    A. I was considering special plywood which has grooves in it which would be placed on top of the un-insulated cement slab. Then Pex would fit into the grooves. And carpet would be installed on...
  9. Are radiant floors actually “Global warmers”?

    I’m considering hydronic heat over an un-insulated slab.

    My concern is that too much heat will transfer through the cement and into the earth causing significant energy loss and higher energy...
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    From what you said, It doesn't sound like he had...

    From what you said, It doesn't sound like he had valance cooling radiators.
  11. Replies
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    This is the only one I have found. Do others make...

    This is the only one I have found. Do others make it?
  12. ahh

    ahh
  13. Replies
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    Cooling Radiator in Crown Molding

    Cooling Radiator in Crown Molding

    Have you ever seen a cooling radiator like this?
    http://www.oikos.com/esb/53/hydroniccool.html

    Is it any good?
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    Hydronic Cooling w/ Ice Energy Storage.

    The system freezes a block of ice then runs water through the ice and circulates the cold water to radiators.

    http://www.bio-radiant.com/PolarBearFR.html

    Aside from condensation, are there...
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    Good brand of hot water “fan-coil”?

    Considering using hot water and fan-coils in the wall or in the ceiling. I want to know if there is a preferred brand that anyone has used?
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    bio-radiant.com ... out of business?

    The phone #'s at bio-radiant.com are disconnected.


    Are other companies selling similar hot water systems that have fans and fit into the wall?
  17. I will never install a centeral FAU again …. if

    I will never install a centeral FAU again….if this is as good as it looks

    http://www.bio-radiant.com/HydroAir.html says I can use a water heater to “Zone Heat a house.

    The system moves hot...
  18. combination water heater and space heater

    I was at a job, and I and noticed a port on the side of a water heater. It was labeled for use with a space heater.

    It had a traditional cylindrical tank and is vented with PVC.

    I was...
  19. Thread: 4 Zone FAU

    by heater99
    Replies
    38
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    2,180

    Oh, I agree. One certainly should not be...

    Oh, I agree.
    One certainly should not be downsizing any ducts. In fact, my view is quite the opposite. I am saying that ideally ducts should be increased. However, if increasing the supply duct...
  20. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,180

    Are you sure? Why would it stay at 40%? It...

    Are you sure?

    Why would it stay at 40%? It appears to me that it would start at 40% then ramp up to 65%.

    My understanding is that aside from zone 1, Rheem’s modulating heater would...
  21. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,180

    If this Zone system is installed, a new nat. gas...

    If this Zone system is installed, a new nat. gas FAU will be installed as well. It is clear to me that to create smaller zones it will be advantageous to match the system with a heater that is able...
  22. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,180

    Can the system also work with heaters that have 3...

    Can the system also work with heaters that have 3 stages? I mean is the board capable of controlling 3 stages biased on percentage of duct (zones) that are calling? Or would the HPP panel simply...
  23. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,180

    What generates the 2 psi? is their a small...

    What generates the 2 psi? is their a small compressor in the control board? Dose it work like a small aquarium air pump? thanks.

    Also dose the system work well with a 2 stage gas heater?

    I...
  24. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,180

    I got a recommendation for the brand "Duct First"...

    I got a recommendation for the brand "Duct First" he said it used telephone wire connectors. I couldn't find it but I did find "Zone First". http://www.zonefirst.com/
    This stuff looks pretty...
  25. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,180

    Yes, that system looks great! Do you think...

    Yes, that system looks great!

    Do you think vacuum controlled damper systems are better than electric systems? It seems that a diaphragm and plastic tubing would wear out long before a decent...
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