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  1. Replies
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    Thanks a bunch!

    Thanks a bunch!
  2. Replies
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    Wow, I did not know that the HPSF took into...

    Wow, I did not know that the HPSF took into account humidity. I am impressed.
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    Heat pumps and efficient wrt humidity

    I was thinking about my heat pumps today and the outdoor humidity. I live on the Gulf of Mexico coast and it is humid, very humid. If I want to determine if heating will be more efficient with a...
  4. My answer stands. There is no way to magically...

    My answer stands. There is no way to magically split the heating system in two and connect it to two gas meters.

    If you decide to go ahead with this, you should consider re-doing the hot water...
  5. It is not going to be inexpensive. You need a...

    It is not going to be inexpensive. You need a second boiler. It might also mean that the existing boiler will be oversized when you separate it from part of its load.

    How do you make hot water...
  6. For small shops, it might be difficult to keep...

    For small shops, it might be difficult to keep well-trained and experienced techs on the payroll. IIRC, typically everyone is making deliveries in the winter and routine service in the summer. Do...
  7. From a rural NY customer point of view, the techs...

    From a rural NY customer point of view, the techs I have dealt with were excellent.
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    Thanks, that clears a things up a lot.

    Thanks, that clears a things up a lot.
  9. Replies
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    That is part of the problem. If there were no...

    That is part of the problem. If there were no solar heat for the pool, a heat pump coupled to the HVAC system would be more cost-effective. Stacking the systems makes for lower financial gain for...
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    Let me make sure I have this right. Now your...

    Let me make sure I have this right. Now your AHUs are outside the envelope of the house. After the changes, that space will be more tightly coupled to the inside than the outside. This is in the...
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    Keep in mind that the OP can use his solar...

    Keep in mind that the OP can use his solar heating system to dump excess heat from the pool water. He can only do that, however, at night.
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    TB is right, and your fear is justified. A very...

    TB is right, and your fear is justified. A very well-designed air conditioning system will reduce the need for dehumidification substantially. When it is too humid and you are cool or at the right...
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    Minisplit placement

    The wife says over and over, "I hate the air blowing on me". I gotta get the wall unit placement right in the bedrooms. First thought is that it seems like the wall right over the heads of the beds...
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    How does one "keep the coils dry"? They reside...

    How does one "keep the coils dry"? They reside in a dark box with minimal air flow after the AC cycles. That is why I found it desirable to build an after-blow system for my car's system. It...
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    The killing you refer to is the most common form...

    The killing you refer to is the most common form of sterilization. That would be in an autoclave with steam. In order to reach temperatures higher than boiling, pressure is needed. The 121 C that...
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    They probably didn't have ducted supply and...

    They probably didn't have ducted supply and return registers or radiators either. Where do you draw the line?
  17. Replies
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    Hey, there is nothing old-fashioned about...

    Hey, there is nothing old-fashioned about hydronic, per se. There are new ways of implementing hydronic systems, but they are still being installed today. There are still radiators. You see a lot...
  18. A universal "button it up" solution for all days...

    A universal "button it up" solution for all days on all AC systems is simply not possible. In a humid region that is probably true. In dry areas the temps drop more at night and they are, well,...
  19. I don't think an answer is possible with current...

    I don't think an answer is possible with current information. There is not a typical Northeast climate. The costal plain is humid, but as you move inland, it gets less so. If you live on Long...
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    I can't argue with that.

    I can't argue with that.
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    " I live in a humid environment and make-up air...

    " I live in a humid environment and make-up air near the range would cut AC costs significantly."

    "Would" is the key word. I don't have this yet. We bought the house in November and it needs a...
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    The make-up air should be very close to the...

    The make-up air should be very close to the cooking appliance, range, cook-top or oven. That will cause heating and increased humidity locally, but avoid pulling in outside air from leaks all over...
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    Please, don't over-generalize. I know that most...

    Please, don't over-generalize. I know that most people only use the kitchen to open the pizza box. Others and I run range hoods for hours sometimes. Especially with gas cooking appliances, it cuts...
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    I have never liked the upright cast iron that...

    I have never liked the upright cast iron that much. My grandparents’ house had nice cast-iron baseboard.
  25. Replies
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    What is a "state hvac department"? Open crawl...

    What is a "state hvac department"?

    Open crawl spaces in raised homes made some sense before air conditioning. Construction techniques are still catching up to air conditioning. In a humid...
  26. Replies
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    I am not saying it is the answer, but consider...

    I am not saying it is the answer, but consider mini-split heat pumps in your mix of options.

    No way I would tear out a beautiful hydronic heat system and replace it with nasty ducts for heat.
  27. Replies
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    Most people can't or won't do the calculations...

    Most people can't or won't do the calculations and their minds boggle if faced with numbers.

    In my case, I have most of the year that I can use dehumidification and cooling so a HPWH will work...
  28. Replies
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    LOL, because capitalists are not required to tell...

    LOL, because capitalists are not required to tell the whole truth. They are only required to not tell lies.
  29. Replies
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    Stories are amusing, but only some grade-school...

    Stories are amusing, but only some grade-school arithmetic will reveal how well alternative water heaters will work for you. Unfortunately, there are some inputs that are difficult. Few people know...
  30. Do those things have an expiration date? It...

    Do those things have an expiration date? It seems like they must have one given their use.
  31. Replies
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    The only thing I can offer are some pictures of...

    The only thing I can offer are some pictures of the controls (motor starting) for a 3 phase, water-chiller AC unit that was installed in my house in the 50s. I still have the 3-phase as anything...
  32. Hey Mr Chesapeake, have you been stealin' stuff...

    Hey Mr Chesapeake, have you been stealin' stuff from my e-lectrical boxes?
  33. Replies
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    Around here Gambusia affinis, 'mosquito fish"...

    Around here Gambusia affinis, 'mosquito fish" would be the best thing, but I am not sure they are cold-tolerant. I am sure that info is out there.
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    You will be a lot more efficient if you turn the...

    You will be a lot more efficient if you turn the main system off while you are working in the office. The ducted system will be changing the air in that room at some level. That will only work if...
  35. Thread: swamp coolers`

    by sneezer
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    Well, I think that they just slough off the...

    Well, I think that they just slough off the flexible pad. I rented there and I used to go up and drain, bleach and drain my system every weekend. The landlord changed pads every year, IIRC. He took...
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    My prediction for investigation results: 1)...

    My prediction for investigation results:
    1) Bypassed safety devices
    2) poorly (negligently) maintained safety devices
    3) emergency plans that were not written for the location and situation but...
  37. Thread: swamp coolers`

    by sneezer
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    1,111

    When I was in Tucson, about 18 years ago, I don't...

    When I was in Tucson, about 18 years ago, I don't remember any "bleed" built into residential swamp coolers. Note that they did not work well if the humidity gets above about 30%, IIRC.
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    LOL, I thought I was going to see one of those...

    LOL, I thought I was going to see one of those vests with cold inserts from Dupont or others.
  39. Replies
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    Not as much as you might think. Electric power...

    Not as much as you might think. Electric power rates here are low and it is a huge investment.
  40. Replies
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    LA, goes for any solar system, heat, hot water,...

    LA, goes for any solar system, heat, hot water, photovoltaic. No limit.
  41. Replies
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    I can't argue. If I were going in that...

    I can't argue. If I were going in that direction, I would be looking at add-ons. I will be going solar since in my state I will get a 50% rebate added to the Federal money. If it were not for...
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    This tank/tankless argument is rendered moot by...

    This tank/tankless argument is rendered moot by more recent developments. Especially in environments where dehumidification and cooling are desirable, forget resistance or gas-fired tanks of all...
  43. There is no heat pump, air conditioner that is...

    There is no heat pump, air conditioner that is going to keep a cool PA basement dry. You will need a dehumidifier unless you want to heat and run the AC at the same time.
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    Thanks, I guess that is all at 100% efficiency...

    Thanks, I guess that is all at 100% efficiency and I correct for that difference separately?
  45. Replies
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    Thanks, It looks like this is possible. Deciding...

    Thanks, It looks like this is possible. Deciding if it is advisable is the next challenge since it might require some assumptions.

    Will someone direct me to a web site that will either make the...
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    Thanks, just to clarify, the boiler does not have...

    Thanks, just to clarify, the boiler does not have much water in it. It is probably what you would call an "on-demand" unit if it were just a water heater. It has "coils", IIRC, one each for hot...
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    oil-gas conversion

    Short form:

    Is it possible and advisable to install a natural gas burner in a boiler that is currently equipped with an oil burner?

    Long form:

    I used to read a lot here and post occasionally...
  48. You are getting to conflicting sets of advice on...

    You are getting to conflicting sets of advice on what to do with your ceiling and roof. Here is a link for new construction in different climates. Similar approaches can be taken in renovation and...
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    The disadvantages of jump ducts vs. using the...

    The disadvantages of jump ducts vs. using the stud cavity are that you are putting more holes into the unconditioned space and the ducts and air will pick up some heat in that space. Yes, you can...
  50. There are plenty of homes in NY that are heated...

    There are plenty of homes in NY that are heated with oil.

    Anyone know what the national figure is for % homes heated with fuel oil?
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