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  1. Graphics Page showing Heatpump cycle with defrost

    http://www.youtube.com/watch?v=GpXj-m3Osks
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    Just to add on this. The least costly thing to...

    Just to add on this.
    The least costly thing to try might be changing an area or zone to adjustible diffusers and adjusting them to a more horizontal throw. Adjusting the center parts of the...
  3. Good grief, you have no idea what I was talking...

    Good grief, you have no idea what I was talking about in #16

    Here it is again.


    "Actually every blower has a design curve, giving various CFMs at different SPs and RPMs.
    Hard to find any...
  4. Now I'm sure you have no clue ! WFIW I agreed...

    Now I'm sure you have no clue !

    WFIW I agreed with him in my first post.
    The second post was general information.

    Maybe you need to slow down and get a grip.
  5. Not sure if you understood either of my two post...

    Not sure if you understood either of my two post on this thread.
  6. Thread: Furnace Runtime

    by Rewind
    Replies
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    3,292

    Got to be cautious when looking at runtimes at...

    Got to be cautious when looking at runtimes at different OATs. The wind speed and direction along with the structure condition makes a lot of variables.
  7. The old blower wheels would simply unload if the...

    The old blower wheels would simply unload if the ESP static went much above 0.50", newer blowers are engineered to handle a higher ESP without unloading.

    -------------------------

    Actually...
  8. Originally Posted by udarrell First, Oil...

    Originally Posted by udarrell
    First, Oil furnace usually have a very large heat-exchanger very near the top of the furnace; if the evaporator coil is not installed at least 6 inches above the top...
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    Here is some information you can use for a...

    Here is some information you can use for a reference.

    It also gives some good information on how cycling affects efficiency.

    These are actual readings on my HP.
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    OK here is a way to prolong the Heat pump life...

    OK here is a way to prolong the Heat pump life (G)
    Have a control system like this.

    The attached jpg is a picture I took of one of the graphics pages I have for my home. I took it last November...
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    The jest of the above is to adjust your...

    The jest of the above is to adjust your thermostat for the widest differential your comfort will tolerate to obtain the best efficiency and equipment service length.
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    The sweet spot would be the least cycles possible...

    The sweet spot would be the least cycles possible that produces a degree of comfort.

    A typical cycle is something like this.

    Thermostat calls..... compressor comes on. ------------------------...
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    Here are a couple jpgs of the top and bottom...

    Here are a couple jpgs of the top and bottom spreadsheet you can look at and see if you want it. My email address is in my profile.
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    Offer goes for anyone else also.

    Offer goes for anyone else also.
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    I made a spreadsheet a few years ago that might...

    I made a spreadsheet a few years ago that might help you compare heating cost. I see I can not attach that type file here so email me if you want it. (Price is right only a thank you will do)
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    I said I was leaving but I had to respond to this...

    I said I was leaving but I had to respond to this post.

    Very well put, you are absolutely correct.
  17. Replies
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    One more post on the subject and I'll go. If...

    One more post on the subject and I'll go.

    If any doubts exists about the example do this:
    Measure it for yourself. It is easier to do if you have a straight throw register. Use a very, very...
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    10,500

    I failed to explain an important part of my...

    I failed to explain an important part of my previous quote.
    Example: A typical supply register with a 20 foot throw as specified with a 25 fpm terminal velocity. At the 20 foot location the air is...
  19. I refer you to Quote #6 in this thread. Rewind

    I refer you to Quote #6 in this thread.
    Rewind
  20. Trying above

    Trying above
  21. I gave a couple of examples in my previous posts....

    I gave a couple of examples in my previous posts. The one about my home works very well, although I have to do it manually by observing the forecast before hand. The commercial examples would be...
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    "The location of the return is not important if...

    "The location of the return is not important if the supply air is distributed correctly."

    Have not visited this thread since I last posted. It has been interesting reading all the posts.
    ...
  23. Agreed ! I have noticed in the last few years...

    Agreed !

    I have noticed in the last few years the temperature forecasting has gotten pretty accurate.
  24. I can see using the forecast in a couple ways for...

    I can see using the forecast in a couple ways for commercial buildings. If the forecast is for a good percentage of sun for the day, buildings with lots of glass, the systems on the affected sides...
  25. Gee Rad1 you are a hard worker, coming in after...

    Gee Rad1 you are a hard worker, coming in after dark like that..............
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