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Type: Posts; User: larrytbm

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  1. Replies
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    346

    Thanks, it has been several years since our temp...

    Thanks, it has been several years since our temp has been this low and the system is only 18 months old. But you are right, 1st stage has handled all our cooling or heating needs except when...
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    346

    Heat pump thermostat issue

    My 2 stage system is an Amana with the ComfortNet thermostat. I thought all units shut the heat pump off and switched to aux (heat strip) heating at low outside temps, like at or near 32 degrees. ...
  3. Replies
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    531

    Energy efficient house

    Wildfire last year destroyed our house and we rebuilt in 7 months doing much of the work. The new 'house' is steel framing, exterior and roof. 1300 SF living space, 700 SF garage, 800 SF RV garage...
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    565

    Upflow system platform

    Our home was totally destroyed by fire in Sept. and I am building a new house using lots of volunteer help. The slab and exterior shell are already complete. This week interior framing begins. ...
  5. Replies
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    524

    Thanks so much, one less thing to have to worry...

    Thanks so much, one less thing to have to worry about right now. Once I can get the sub contractor started on the building, I still have to re-run water, sewer and electric lines and get someone to...
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    524

    Main air duct size

    We lost our house in a wildfire Sept. 4th. The site is cleaned up and I'm planning the rebuild. Metal building, house 30x44, garage 30x24 and RV garage 18x46. Not sure if we have the funds to...
  7. Replies
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    628

    New system performance

    I posted last yr about replacing my old 3-1/2 ton heat pump system. My calculations showed I only needed about 20 kbtu cooling with a design temp of 98 degrees. I decided on an Amana 3 ton 16 SEER...
  8. Replies
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    3,809

    Dealer finally called me back and emailed the...

    Dealer finally called me back and emailed the Cert. Heat pump 25HCB636A30, Handler FV4CN(B,F)005. He still claims the tin plating addresses higher corrosion issues with R-410 that other brands...
  9. Replies
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    3,809

    No response, I'll look for another dealer...

    No response, I'll look for another dealer tomorrow. The rep. claimed the tin plating improved reliability with the switch to R-410 and therefore other brands would not be as good. This dealer also...
  10. Replies
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    3,809

    Thanks for the clear feedback, the dealer was...

    Thanks for the clear feedback, the dealer was supposed to get me the part #'s late yesterday, hopefully today I'll hear something. Regarding the tin plated (ArmorCoat) coils, is that an exterior...
  11. Replies
    11
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    3,809

    Sorry, I forgot to put that in. The heat pump is...

    Sorry, I forgot to put that in. The heat pump is definately the Comfort series. I'm not sure about the air handler. It may be the Performance series. I want the variable speed and Carrier's...
  12. Replies
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    3,809

    Amana: ASZC160361A, AEPF313716A + TXV ...

    Amana: ASZC160361A, AEPF313716A + TXV

    Carrier: Still waiting for the details, these guys are really busy with the state rebate program starting on April 5th.

    Ruud: UPRL-036JEZ, RHPL-HM3621JA
  13. Replies
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    3,809

    Amana vs. Carrier vs. Rudd??

    I'm going to take advantage of the big rebates and tax credit to replace a 12 yr old system. Looking at 3 ton, 16 or 16.5 SEER, 2 stage heat pump with VS air handler. All three quotes are for this...
  14. Replies
    36
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    3,779

    Stopping or reducing the amount of energy would...

    Stopping or reducing the amount of energy would be a big help. Slowing down the transfer speed helps very little, the heat will still impact the living envelope. If one is lucky, maybe after sunset...
  15. Replies
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    3,779

    I think radiant barrier is a waste of money, here...

    I think radiant barrier is a waste of money, here is why. First my experiment simulating RB wall paint. I used old fashion aluminum paint on a loose piece of wall substrate and backside IR...
  16. Replies
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    555

    Call your local utility company, some will do an...

    Call your local utility company, some will do an energy audit for free and there may be funds available to help with making energy improvements. They can also help you find a company accredited to...
  17. Replies
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    2,465

    Great comments from udarrell, bjones and...

    Great comments from udarrell, bjones and jerryd_2008. Why not have a 'stickey' at the top of the residential section that gave all the details of a good installer, what are the steps, what happens...
  18. Replies
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    2,073

    I can only share my experience. I shut my whole...

    I can only share my experience. I shut my whole house unit off at 10pm with an outside temp of about 95F and just run a small A/C in the master bedroom with the door closed. During the night,...
  19. Replies
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    2,525

    That chart is pretty accurate, at least in my...

    That chart is pretty accurate, at least in my case. It shows between 1250 hrs and 1500 hrs of system operation. My data shows May thru Sept. a total of 3544 hrs with 2383 hrs above 75F. I...
  20. And the money will come from where?? Your pocket...

    And the money will come from where?? Your pocket thru higher taxes, either income taxes, sales taxes or some small hidden fees on your utility bills, etc. No such thing as a free lunch is still...
  21. Replies
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    2,525

    If you don't mind a few hrs work, you can make...

    If you don't mind a few hrs work, you can make any data set you want from the nearest weather site. I did this yesterday for Central Texas, pulled hourly data from May, 2008 thru Sept., 2008. Then...
  22. Replies
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    968

    Thanks

    Thanks for all the replies, I just wish I knew more. If I do get a dual stage heat pump and my existing W-R doesn't give me some owner flexiability, I may need to look at other tstats, because this...
  23. Replies
    16
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    968

    No luck

    Already tried that, no more info than the setup manual. It does show both fast cycle and slow cycle options, fast is 1.2 F and slow is 1.7 F. But I assume that just means how much the temp must...
  24. Replies
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    968

    More detail

    As I indicated, my tstat is a multistage unit. But what data is used to determine the switch over? Purely run time or rate of temperature drop or something else? The tstat manual has...
  25. Replies
    16
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    968

    Two stage HP switching?

    What determines when a two stage heat pump switches from 1st stage to 2nd stage? Somewhere I heard that after 10 min. it will switch to 2nd stage if the system hasn't satisfied the set point, but...
  26. Replies
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    506

    Try < no links to direct purchase allowed in...

    Try < no links to direct purchase allowed in post> There are many other mh supply sites as well that also have furnace and A/C sections in addition to all the other items.
  27. Thanks

    Thanks, now I know what to dig into deeper. This is at least one of the issues that simple load models just fail to cover.



    Actually, I already have a test panel made up but we are finally...
  28. Replies
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    1,185

    Pstu, That is good info. If I understand your...

    Pstu,
    That is good info. If I understand your point, there will be no difference in operating costs or performance during 1st stage operation or the amount of time the system will operate in 1st...
  29. Replies
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    1,185

    Question about Trane

    Since Trane uses dual compressors with the smaller one 50% of the large compressor, I'm assuming that they both don't run at the same time, correct? So, the large compressor would be 30,000 BTUs and...
  30. Are you saying that Manual J allows different...

    Are you saying that Manual J allows different deltaTs for different building components? And different compass orientations? Even when the design summer temp for central Texas is defined as 98 F? ...
  31. Does Manual J consider radiant heat gain?

    Another model I came across had window shading factors and of course low-E glass window options. But what about considering radiant heat on the exterior walls? Last week with an IR gun I measured...
  32. Replies
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    1,185

    Thanks, so if only Trane has a 2.5 Ton 2 stage...

    Thanks, so if only Trane has a 2.5 Ton 2 stage unit, that makes it more important to understand my other options better. Would a 3 Ton 2 stage unit run on low much of the time? Like at night and...
  33. Replies
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    1,185

    Back to original ?

    OK, what brands make a 2.5T dual stage 18+ SEER heat pump + VS? I'd like to really focus on those dealers.

    Then, if availability, price or other issues make that choice questionable, which would...
  34. Replies
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    1,185

    The one report lists sensible at 15,248 BTUs and...

    The one report lists sensible at 15,248 BTUs and 1.3X for moisture removal for total of 19.822 BTUs. The attic on a MH is only about 24 inches high, sloping to maybe 15 inches in the center of the...
  35. Replies
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    1,185

    Size for new system

    Iím planning on replacing my 11 yr. old heat pump split system and having problems deciding on the right system size. First, the house is a 1400 SF double wide, but unlike most mobile homes, I...
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