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  1. Replies
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    Good point! The older fans make a kind of white...

    Good point! The older fans make a kind of white noise, not so different from wind through the trees.

    So the scroll compressor noise similar to a gas powered leaf blower a block away is normal? ...
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    Scroll Compressor Noise

    The propaganda about scroll compressors says they are inherently quieter than piston compressors. However, as I walk around my neighborhood, there is a noticeable and annoying hum/buzz from all the...
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    Will do. My goal was to decide whether to call...

    Will do. My goal was to decide whether to call an HVAC tech or duct sealing company. I will start with the HVAC tech. Thanks for helping me be a more knowledgeable customer.
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    That could be. I did not drill holes into the...

    That could be. I did not drill holes into the duct junction box, but this is a mild day, attic is 78, and I measured the box's exterior. The top is 75, the bottom is 68 for a difference of 7...
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    I did notice that this white 1/2 inch PVC pipe on...

    I did notice that this white 1/2 inch PVC pipe on the side of the coil plenum is blowing air. I assume this is an emergency water drain, but is it normal to blow air unrestricted?

    275741
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    Correct

    Correct
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    My mistake. I meant 3 ton unit. Good you caught...

    My mistake. I meant 3 ton unit. Good you caught that.
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    a

    a
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    The ducts closer to the camera in each picture...

    The ducts closer to the camera in each picture are closer to the coil and they are the colder ones.
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    a

    a
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    The ducts closest to the camera are closest to...

    The ducts closest to the camera are closest to the coil and these are colder than the ducts further from the coil/camera.
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    It's raining today so the attic is cool. Did the...

    It's raining today so the attic is cool. Did the army crawl behind the plenum and found no leaks.
    I checked the far left duct entirely and I only found a leak where the register attaches to the...
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    This is a gas furnace/AC mounted horizontally in...

    This is a gas furnace/AC mounted horizontally in the attic. The whole unit is one long box from intake to plenum.
    The air flow is one turn from the return then from the blower fan straight across...
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    Did so. Ran a multi-meter temp probe as far as...

    Did so. Ran a multi-meter temp probe as far as it would reach and still the same results. Used an IR meter on the face of the grill and got higher readings of course, but the same delta. Only the...
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    10 degree difference at registers

    Just checked on this hot day and found some registers at 56F and others at 66F. There are 4 ducts, all the same size, coming from the plenum. All the registers on the 2 ducts closest to the coil...
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    First, go to your local library, and get a book...

    First, go to your local library, and get a book on Weatherization.
    It will tell you what Energy Rater La did in more detail and with color pictures. With minimal costs, you may get major results. ...
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    Texas is coal powered - go figure. cities that...

    Texas is coal powered - go figure.

    cities that did not opt for deregulation are paying about 10cents/kwh.

    deregulation sounds good, but you need more than one provider for competition to...
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    Texas Electric Rates

    People are paying 17 cents/kWh in Texas????


    I myself would find it hard to believe there paying that much per KWh, up here in wisconsin I think my rate is only .10 or .11 per KWh and NG is just...
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    is this crankcase heater common even on older...

    is this crankcase heater common even on older units? None of my neighbors have heard of turning off the power to the outside unit in winter. How much power do they draw? Thanks for the tip.
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    Cats eat mice. Rats eat cats. A good snake eat...

    Cats eat mice. Rats eat cats. A good snake eat them all.
  21. Carnak, Wouldn't the opposite apply as well? ...

    Carnak,
    Wouldn't the opposite apply as well?

    ..... We hit a hot snap of two weeks in the plus 100's and no problem with temperature as long as he never set it back.

    ....Setting back during the...
  22. forget setback

    I have gone through the same thing in Houston. Once the temps get close to design loads, around 95 for us, setback is non-efficient. You spend more energy getting the heat and humidity out of your...
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    I received this reply from Dan Lea of CIMA about...

    I received this reply from Dan Lea of CIMA about the referenced study:

    Dr. Godish was hired by fiber glass companies to write a hit piece paper on cellulose insulation to support their bogus...
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    I found the article using my library on-line...

    I found the article using my library on-line magazine feature. I can send it to you if you like, Kenny.

    The study was of 4 buildings which had occupant complaints- 2 health related, 2 structural...
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    Why?

    Please explain further.
  26. Replies
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    great link Carnak! I like that method. Leaks...

    great link Carnak!
    I like that method. Leaks should be easy to find before doing structural damage. Is it cheaper to build than spray on the underside?
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    Carnak, I'm not familiar with that method. Do...

    Carnak,
    I'm not familiar with that method. Do you have a link where I could read more?
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    Assuming there is a vapor barrier on the existing...

    Assuming there is a vapor barrier on the existing insulation, and it is on the interior side, the rigid would create another vapor barrier on the exterior side. This is never a good practice. If...
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    How close to the plenum is your leak? I had...

    How close to the plenum is your leak?

    I had a similar problem when my plenum supports sagged over time. The evaporator coil was creating more water than could drain quickly, and some blew into...
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    No, but there is a concern about toxic gases...

    No, but there is a concern about toxic gases released when some foam burns.

    It may or may not apply to the OP, but it's free to ask.
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    I would be concerned that the rigid board...

    I would be concerned that the rigid board insulation would create a vapor barrier trapping moisture between the ceiling and the existing insulation.

    What is your local code about fire protection? ...
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    Paul, Did you pay more for the radiant barrier...

    Paul,
    Did you pay more for the radiant barrier in your new house? RB attached to roof decking at the factory should be minimal or no more than plain plywood decking.
    My payback was 0 yrs (no...
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    Definitely method 2 in the FSEC document...

    Definitely method 2 in the FSEC document (attached under the rafters)

    Then if you want more reduction in your cooling bill, you can add blown in cellulose. The radiant barrier will act as a...
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    I do love the concept, if not the price, of a...

    I do love the concept, if not the price, of a sealed attic. Cool, clean, bug and bat resistant, easy to see plumbing, wiring, etc.

    But how would you find a small roof leak prior to it becoming...
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    What you said is 100% correct BigJon! I quoted...

    What you said is 100% correct BigJon! I quoted what you said and responded to RS's question about what would happen if he left the foam around the flue.
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    Unless this flue is rated to have insulation...

    Unless this flue is rated to have insulation touching it, you have a fire danger. Check your code, but you typically need a 6 inch offset around a hot flue. A metal collar/flange provides an offset...
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    I'm back with the June results = 210 kwh less...

    I'm back with the June results = 210 kwh less than May. Not quite 10 per day, but June is a hotter month.

    The point of this exercise is that homeowners should try various settings, even when they...
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    After all that's been said, I'm still thinking...

    After all that's been said, I'm still thinking this is going to be a major part of the solution.
  39. Replies
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    Nope, Ryan. Just was in the same boat as RomSpy...

    Nope, Ryan. Just was in the same boat as RomSpy 2 yrs ago. My kwh expense is 2.5 times his, and I'm twice as frugal. (Still can't believe he has only 8 cents/kwh.) Read a book or two and became...
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    1) you may be asking too much of your system to...

    1) you may be asking too much of your system to drop 10 - 12 degrees all at once. at the upper limit of the design load, keeping a house cool is less costly than cooling it. try setting the tstat...
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    8 cents/kwh and $175. Over 2100 kwh! Good golly...

    8 cents/kwh and $175. Over 2100 kwh! Good golly Miss Molly! I used half of that last month comfortably in a 1750 sq ft 35 yr old house with same age AC in hot humid Houston. Unless your climate...
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    Hello again RS, Jax1 here. Been there, done...

    Hello again RS,
    Jax1 here.

    Been there, done that 2 yrs ago. I've some good experience in reducing electric bills for my friends and neighbors. Our rate jumps 5 cents per kwh a yr, currently...
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    Jack, I got 10 kwh/day less with a smaller SPAN...

    Jack,
    I got 10 kwh/day less with a smaller SPAN (shorter cycles). But it's not really important. That was just an example of how a simple change can make a big difference. Smaller is better for...
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    During the day it's programmed at a comfortable...

    During the day it's programmed at a comfortable setting for us that varies probably due to humidity. Early and late season it's mid 70's, mid-season it's upper 70's. It's programmed to drop 1 degree...
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    RS, please post back what you find that works...

    RS,
    please post back what you find that works best for you. our electric rates are rocketing (Houston you know, Rocket, yuk, yuk). never would have thought of that SPAN thing if I hadn't got the...
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    must package units be on roofs? flat roofs are...

    must package units be on roofs? flat roofs are not popular in very rainy climates. common construction is slab on ground/ sloped roof. can these units sit on the ground or otherwise be compatible...
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    Package Unit vs Split System

    OK, what are the advantages of each for residential use.

    Split systems are what are most always used. It requires longer and more skilled installation. Plus the attic seems to be the worst...
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    Read the meter

    Very true! This matches exactly what I experienced in Humid Houston.

    The 'setup while out' worked until the temps went to the mid 90's. At those temps and normal stat settings, I have a 30min...
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    OK I'll bite. How? Hopefully not by looking at...

    OK I'll bite. How? Hopefully not by looking at it because I can only see the side edges of mine. And if it is dirty, how would you clean it if you can't see it? I've been thinking of cutting a...
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    All Goodman bashers, come see me. My much older...

    All Goodman bashers, come see me. My much older low end contractor's unit is
    operating well in Houston. Clean what? Lubricate what? Never has been serviced except once 2 yrs ago (added a bit of...
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