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  1. Replies
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    920

    I find that most of the equipment is in the range...

    I find that most of the equipment is in the range of 100% over sized. This is not a rule to just cut the appliance size in half. I am amazed that a heat pump will be sized let's say for 3 ton. This...
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    12
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    920

    He followed manual J for the programming it is...

    He followed manual J for the programming it is accurate. Any heat loss will actually oversize equipment slightly, maybe 15 - 20%. I usually suggest homeowners get the heat loss done so all the...
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    920

    Must be a big secret!

    With all the talk about confusion on which equipment to buy being it 12 SEER or 20 SEER. This brand or that brand. 80+% or 90+%. With all this talk why we do not talk more about proper sizing. The...
  4. 1/2" pipe will carry between 15000 and 17,000...

    1/2" pipe will carry between 15000 and 17,000 btu's. They may be OK depending on the size of the radiator.
    I would get used to installing water boilers before I try converting an old steam system....
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    2,213

    I would think the unit is large enough. At 106...

    I would think the unit is large enough. At 106 you can only expect a 20 - 25f drop from outdoor temps. There may still be duct leaks but as far as sizing it is OK. The electric bill seems high. My...
  6. Is it one pipe or two pipe steam? This may be...

    Is it one pipe or two pipe steam? This may be best left to experience as it can be a real headache. If two pipe steam are the returns from the radiators large enough or must they be resized? Is it a...
  7. Having 35 years in this industry I usually find...

    Having 35 years in this industry I usually find the manufacturers to be fair in their warranties. The warranties are for manufacturers defects. The reason in my opinion that they get a bad rap is due...
  8. I also would keep the radiator system. Install a...

    I also would keep the radiator system. Install a high efficiency boiler with outdoor reset. Then add a duct system for a/c. I am a firm believer that separate systems are best but getting better as...
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    2,459

    Rheem has been a very good product for me for the...

    Rheem has been a very good product for me for the last 20 years. I have installed a few hundred with excellent results. Just make sure whom ever does the job it is sized properly with a heat gain and...
  10. Richvacr, you post leads to what I have been...

    Richvacr, you post leads to what I have been saying for years. there is a product for every application and it is not always the most or least efficiency. It is the locale and the job. Back to your...
  11. It does not matter to the current administration...

    It does not matter to the current administration if you can afford it or not. They will just pass another stimulus bill. Has the first one helped you yet?
  12. Replies
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    1,612

    you have more problems than the unit not cooling....

    you have more problems than the unit not cooling. When it does get fixed it will never be comfortable. 3.5 ton for a house <1900 sq ft. In a brand new home a 3.5 ton should be about 4000 sq ft if not...
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    1,925

    For FAQ on heat loss and importance of them...

    For FAQ on heat loss and importance of them follow this link. There should never be a central heating or cooling unit installed without a manual J heat loss.
    I had a guy mention to me one time he...
  14. How many btu's will a heat pump put out without back-up?

    Is there a formula to determine the amount of btu's a heat pump puts out at at a given outdoor temperature providing air flo charge etc is correct?
    I have a Rheem unit model # RHSL-HM2417JA Air...
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    Here is a chart that may help....

    Here is a chart that may help.
    http://www.comfort-calc.net/Air_Conditioning/General_Troubleshooting_Chart.html
  16. I think all these rate hikes is a government ploy...

    I think all these rate hikes is a government ploy to push residential customers to solar and windmill use for power and heat. :D
  17. That is too big of a jump. There are other sizes...

    That is too big of a jump. There are other sizes available like 70,80,90,105,120,150,210,225,285,399. Some have a 5-1 turn down and others are 3-1 turn down. Some are cast aluminum and some are...
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    750

    What they both said but the important thing is...

    What they both said but the important thing is make sure the pad is not touching the home or you will get a vibration noise inside the home. Most are 12" or more.
  19. A lot of guesses go on when we talk mod/cons. You...

    A lot of guesses go on when we talk mod/cons. You don't know what temperature you will be operating at until there is a heat loss and radiation calculation done. Nobody knows when your system will...
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    867

    A properly sized unit should be only able to drop...

    A properly sized unit should be only able to drop the temp 20f and a/c will max out about 90 - 95 f. In those king of temperature it should run a lot and almost non-stop. As cooler3 stated you must...
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    If that 50 x 25 is a single story the 2 ton...

    If that 50 x 25 is a single story the 2 ton should have been more than plenty. How did it heat? It sounds more like a duct or charge issue. Have a heat gain done and verify the size. beyond that it...
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    I would start with a duct static test. What...

    I would start with a duct static test. What specifically is your problem. You are very vague. Is it not cooling well, part of house a different temp or what.
  23. Replies
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    Hmmmmmmmmmm! Buying one or two dehumidifiers,...

    Hmmmmmmmmmm! Buying one or two dehumidifiers, paying to run them plus paying for an over sized a/c unit, paying for a dump duct. Add to that the extra heat you have to remove from the humidifier(s),...
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    Manual J should separate it well between the...

    Manual J should separate it well between the first floor and second floor as the second floor has a heat gain for the ceiling and the first floor does not. The first floor has a floor loss which is...
  25. Here is a place to start for getting info....

    Here is a place to start for getting info.
    http://www.comfort-calc.net/Water_FAQ.html
    Start with sizing and follow the installation manual. That's what I always suggest. Boiler AFUE efficiency is...
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