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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.
  2. Replies
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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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    1,261

    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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    515

    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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    515

    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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    510

    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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    510

    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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    510

    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
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    2,235

    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
    2,235

    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
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    2,235

    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
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    2,235

    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
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    2,235

    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
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    2,235

    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
    2,235

    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...
  26. Thread: 4 Zone FAU

    by heater99
    Replies
    38
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    2,235

    Ouch!! It's worse, I am mostly the designer. I...

    Ouch!! It's worse, I am mostly the designer. I design the layout first, get my customer happy with it, then think about how to best handle the mechanical.
  27. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,235

    Are you aware of a 4 or more zone, forced air...

    Are you aware of a 4 or more zone, forced air furnace, which operates on "natural gas"?
  28. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,235

    I am a designer and general contractor. I have...

    I am a designer and general contractor. I have done major remodels to 11 homes and minor repairs to many more since 1999. I work closely with a small group of investors who appreciate my attention...
  29. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,235

    I was thinking with all the variable speed...

    I was thinking with all the variable speed compressors and variable speed blowers I thought I could find a 25%/50%/75%/100% 4 zone system but I suppose it is difficult to design a 4 stage burner for...
  30. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,235

    Ok, the house has: A 600sq’ 2nd floor east...

    Ok, the house has:
    A 600sq’ 2nd floor east facing addition, big private office with insulation.
    A 600sq’ 2nd floor west facing 3 bed rooms aria non insulated.
    A 600sq’ aria downstairs on a cement...
  31. Thread: 4 Zone FAU

    by heater99
    Replies
    38
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    2,235

    perhaps, but The project would require less duct...

    perhaps, but The project would require less duct modifications if it were just a matter of adding 4 duct valves. and 1 new FAU.
  32. Thread: 4 Zone FAU

    by heater99
    Replies
    38
    Views
    2,235

    4 Zone FAU

    Customer wants to use 4 separate thermostats in 4 separate 600 sq’ zones of a house.

    The house has 1 central FAU with ducts serving the entire house.

    I am preparing 3 proposals.

    1. Adding...
  33. Leaky Flare nuts on mini-split refrigerant line.

    I was wandering why mini splits use flare connections. I find them to be less reliable than soldered connections. Has anyone ever soldered the entire flare connection and nut assembly together?
  34. Replies
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    The best mini split heat pump

    I am considering these 2 units.

    (A). LG LA125HV Art Cool 12,000/15,500 BTU 18.7 SEER Heat and Cool Mini Split Air Conditioner w/ Advanced Inverter Technology.

    (B). MSZFD12NA / MUZFD12NA -...
  35. Replies
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    justify the cost of higher Seer?

    I have herd that mid range seer is the way to go. But I have higher than average electric rates, milder than average climate. And the user dose not pay the electric bill.

    Considering 18 or 22...
  36. The return air side is large enough, air feeds...

    The return air side is large enough, air feeds straight up through the ceiling to the heater.




    My contractor has already determined that his setup is “good enough” I doubt he is interested in...
  37. Is this acceptable, or should another supply duct be added?

    120k Btu gas FAU blowing hot air into supply ducts totaling 157sq.in.

    120k x 80% = 96k Btu output.

    IRC and UMC call for 2 sq.in./kBtu output.

    96k Btu x 2sq.in. = 192sq.in. required.

    192...
  38. Reclaiming heat loss from a laundry machine.

    I was wandering if any codes would prevent a builder from ducting dryer exhaust 20’ through a living room before exiting?

    Sorry if posting this is prohibited. I think I posted it before, but...
  39. Replies
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    4,684

    Did I do the math correct?

    Heat pump with electricity at 30 cents per kw-hr C.O.P. = 2.6? at 40F:

    (1,000,000 / 3414 btu per kw-hr) x $0.30 / 2.6 C.O.P.
    (292.92) x $0.30 / 2.6 C.O.P.
    $87.88 / 2.6 C.O.P.
    $33.29

    1...
  40. Replies
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    528

    Vent-less washer+dryer all in one.

    I’m looking at LG’s. Model : WM3677HW , They say it has “Ventless Condensing Drying” , it runs on 115V.
    Q1. How dose a vent less dryer work?
    Q2. How dose it cool the condenser coil if it has...
  41. Replies
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    4,684

    Do you think this unit would have a COP of 3 or...

    Do you think this unit would have a COP of 3 or better?
  42. Replies
    18
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    4,684

    Considering a Friedrich Twin Temp heat pump...

    Considering a Friedrich Twin Temp heat pump YS13L33
    http://www.friedrich.com/products/ModelOverview.php?model=YS13L33

    It is 11 EER.
    A COP rating is not available according to Friedrich’s tec....
  43. Replies
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    4,684

    The room will be climate controlled year round. ...

    The room will be climate controlled year round.


    The unit would not have backup strips
    The project is in Southern California near Disny Land.
  44. Replies
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    Would you assume that that 10,000,000 BTU,s would...

    Would you assume that that 10,000,000 BTU,s would cover a winter season?

    Annual cost for gas ………….....= $197.80
    Annual cost for Heat pump…..= $292.90
    Difference…………….................= $105.00...
  45. Replies
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    If Gas = $19.78 and Heat pump = $29.29 did you...

    If Gas = $19.78 and Heat pump = $29.29 did you mean to say Gas is about 30% cheaper. Or am I missing something?

    PS. Also I was wandering if you included the cost of the electric used by the...
  46. Replies
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    Estimating Cost to run heat pump vs. nat.

    About how much would it cost to run a 10 seer hotel style heat pump instead of an 80% AFU natural gas F.A.U. with an electric blower?

    California Electricity….. ~ $0.30 x Kwh
    California...
  47. Replies
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    843

    Home Purchase, Contract Question.

    (12.) If Kim fails to make a payment, Bob is to send a notice of the failure to Kim. If Kim does not make up the missed payment within 30 days of receiving a notice of the missed payment and has...
  48. Re-negotiating loan terms. (credit counselor)

    A credit counselor says he can freeze my credit for 90 days. Then he can negotiate with my bank and have them erase my second loan to avoid having me default on both loans. He says he can negotiate...
  49. Are you sure? I have always herd that a...

    Are you sure? I have always herd that a forclosuer stays on your record for x years and then it falls off, Like it never happened and your score is based on everything that is still on your credit....
  50. Lawyer....

    So I should pay a lawyer to negotiate and represent me. That would never have cured to me.
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