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  1. Replies
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    Sure, but it will have some water in it all the...

    Sure, but it will have some water in it all the time.

    I don't want to grow mold - do pan tablets in general kill mold?
    Is the slime that forms in the AC pan, mold, bacteria or what? I don't...
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    Pan tablets for AC that kill mold?

    Is there a particular kind of pan tablet for a window AC that is better for killing mold? I have mold allergies.
    thanks
    Laura
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    window AC/heat pump for mobile home

    I may be moving in a hurry soon into a mobile home that doesn't have AC, so I need to buy a window AC quickly, and I'm looking for recommendations.
    The floor area is something like 850 sq ft. ...
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    Maybe I could wrap a heating cable around it, the...

    Maybe I could wrap a heating cable around it, the kind they sell for water pipes so they won't freeze.
    I don't know if that would have enough power, the one I saw online uses only 36 watts.
    ...
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    heating for airline respirator hose

    When I'm indoors I use an airline respirator that pumps air through a hose from the outside to a facemask I wear. The hose is 50' long, but in the NY State winter the length won't be enough to warm...
  6. Thread: air compressor

    by plarian
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    Sure, I get it maintained by the people who...

    Sure, I get it maintained by the people who installed it. But cleanings in between their visits are also needed. A surprising amount of fuzz gets through the filters (which yes, I do clean).
    My...
  7. Thread: air compressor

    by plarian
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    air compressor

    I have a fujitsu minisplit AC. The fan in the indoor unit gets all gunked up. Stuff gets through the filters and into the fan. Probably of canine origin :)

    So I'm thinking of buying an air...
  8. Thread: heat pump

    by plarian
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    A heat pump water heater can exhaust cool air to...

    A heat pump water heater can exhaust cool air to an indoors space. I guess it's using a much less powerful heat pump.

    Laura
  9. Thread: heat pump

    by plarian
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    Huh. Would it make sense, I wonder, to have a...

    Huh.
    Would it make sense, I wonder, to have a heat pump pulling heat from my garage? My garage is in the lower floor of my house. It's warmer than the outside because of heat leaking through the...
  10. Thread: heat pump

    by plarian
    Replies
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    heat pump

    I got a Fujitsu minisplit heat pump last summer. I meant it for AC.
    But I was startled to find the thing is going to pay for itself quickly in savings on my heating bills!!!
    I live in NY state. ...
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    Does anybody have COP data for different...

    Does anybody have COP data for different temperatures for some minisplit that's a similar size to mine? Mine is about 1.25 ton.

    Probably all these minisplit heat pumps have very similar COP. ...
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    I asked Fujitsu, somebody there called Mike, for...

    I asked Fujitsu, somebody there called Mike, for the COP of my 15RLQ heat pump. He said max 1.54. But it's "rated heating" was 3.07. He said the "rated heating" is a COP in ideal conditions in the...
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    Metal venting, "spark ignition". 24 years old. ...

    Metal venting, "spark ignition". 24 years old. Says "efficiency 82.9% A.F.U.E." When it was new.

    Laura
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    I don't know. But it's old so it's probably not...

    I don't know. But it's old so it's probably not very efficient.

    For the heat pump, the manual gives the "temperature range" for heating mode as 5 to 75F.

    So you're telling me the heat pump...
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    I live in New York state. It gets down to 0F...

    I live in New York state. It gets down to 0F often and sometimes colder in the winter.
    The electricity is 13.5 cents/kwh here, and natural gas is $1.66/therm.
    I have a Fujitsu 15RLQ minisplit....
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    heat pump vs forced air gas

    I had a Fujitsu minisplit heat pump installed. I also have forced-air gas heat.
    Below some temperature, from what I understand, it'll cost more to have the heat pump helping to heat the house,...
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    Minisplit installed and thanks!

    Hi, I posted a lot of questions here about AC, and I've gotten my minisplit installed. I'm happy with it. And thanks to all the people who responded to my questions!
    I have 660 sq ft of upper...
  18. whole house dehumidifier w inverter compressor

    Is there a whole house dehumidifier with an inverter compressor? It would run at a low level a lot of the time, thus helping with noise issues?

    It seems like inverter compressors are the future...
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    forced air gas heater

    I have a forced air gas heater, and I've wondered if, when the fan is on, some of the air gets ventilated out to the outdoors. Would this never happen? The only ventilation in it is probably...
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    I talked to Fujitsu and they said they have a...

    I talked to Fujitsu and they said they have a minimum length for refrigerant lines to avoid refrigerant flow noise, and the bedroom is far enough from the outdoor unit so that I wouldn't be hearing...
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    There are lots of ways of doing it. This is just...

    There are lots of ways of doing it. This is just what he came up with.

    I suppose you don't have to locate the outside unit right next to the house, even.



    Sure. So it's feasible to...
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    How loud of a whoosh? Kind of hard to describe,...

    How loud of a whoosh? Kind of hard to describe, probably. Whooshes are relatively un-irritating, but introducing any kind of noise into the sleeping area isn't good. I'd probably run it in dry...
  23. Replies
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    I don't have it installed yet. I had a...

    I don't have it installed yet. I had a contractor over to look at how to install a mini-split and that was his suggestion, have the lines run the length of the house since I wanted the outdoor unit...
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    refrigerant noise?

    does refrigerant ever make noise going through the lines, like gurgles etc.? It looks like the refrigerant lines for my mini split might run through the bedroom suspended ceiling.
    Laura
  25. Thread: LG mini splits

    by plarian
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    LG mini splits

    I was talking with a local contractor and he said he liked LG mini splits. Since these weren't mentioned to me as good brands when I asked here, do you think they're similar in quality to...
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    People are more likely to see it if it's its own...

    People are more likely to see it if it's its own thread. I can reword it to make it more a standalone post if you like.
    Laura
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    Seems about right. This person didn't like...

    Seems about right. This person didn't like Fujitsu as much, but maybe it's just a dislike of lighter plastic, he said the condensate tray for instance was lighter plastic. Light plastic doesn't...
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    a

    a
  29. Replies
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    Fujitsu vs Mitsubishi and other mini-splits

    I talked with a local contractor who told me that Fujitsu mini-splits are "somewhat cheaper" than Mitsubishi, he said "lighter plastic", "fewer bells and whistles". Vague.
    Is this true? Are...
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    dry mode in mini-splits

    I've been looking into the four brands I was told are good mini-splits - Sanyo,Mitsubishi, Fujitsu and daikin.
    One of the questions I have about dry mode is if, say, I have the house at 75 F in...
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    Thanks, that is useful info. Because the...

    Thanks, that is useful info. Because the contractors will assure me that I should have a largish system to avoid the possibility of not being cool enough. And that with an inverter compressor I...
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    I do. I want it to keep on running slowly...

    I do. I want it to keep on running slowly overnight, to dehumidify, even if it gets cold. Not to stop when it gets below a certain temp.

    Is there a particular brand that's preferable for this?...
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    I wonder if any of the mini-splits are...

    I wonder if any of the mini-splits are particularly better at dehumidifying overnight? It would be much quieter than my portable dehumidifiers, so it's preferable to have the AC doing it.

    So...
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    So this means that it operates well down to an...

    So this means that it operates well down to an actual temperature of 67 F, that being the "dry bulb" temperature.

    The setting range they give goes down to 61 F.

    Thanks,
    Laura
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    WB and DB in operating range for minisplit

    What does, say, 67 F DB and 57 F WB mean for the operating range of a minisplit?

    See for example, pg 11 of http://www.mrslim.com/UploadedFiles/Resource/MSY-A24NA_Op_Manu_SG79Y962H03_12-29-08.pdf...
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    What is that in the picture? The mini-split...

    What is that in the picture? The mini-split manuals have directions about cleaning the filter, did the people not clean their filter?
    Why is a mini-split worse than central air? I did a search...
  37. Replies
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    mold in mini-splits

    Are there any things I should be considering with a choice of mini-split, in terms of avoiding mold growth?
    When I looked, mostly I found references to mold in air ducts or in the insulation in an...
  38. Mini-splits that keep themselves dry inside

    I read that the evaporator inside a mini-split can get wet and maybe grow mold, which is an allergy problem. And some mini-splits run a special cycle to dry the evaporator.
    which ones? I'm...
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    Does it matter to have an installer that's...

    Does it matter to have an installer that's trained with that specific mini-split?
    Mini-splits are pretty easy to install so maybe it doesn't matter?
    Does anybody know by the way, which brands...
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    Mini-split ac's to look into

    I pretty much decided what I want for my house is a mini-split AC. It's small, the upper floor is about 650 sq ft., and I would have the mini-split on the upper floor.
    What are good brands to...
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    Manual J and roof ventilation

    It seems that a Manual J can at best only be a very rough estimate, because it's so hard to take good account of roof ventilation.
    I got my roof ventilated a few years ago and it cooled down my...
  42. Replies
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    It seems like the AC might dehumidify a lot, if I...

    It seems like the AC might dehumidify a lot, if I can get it to do what I described: keep the house say 78F and <50% RH during the day when cooling is needed; and at night run AC slowly to keep on...
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    Do you mean something like that idea of having...

    Do you mean something like that idea of having heat strips on the outdoor unit so it doesn't ice up?
    Would it have to be warmed up somehow to dehumidify overnight?
    Laura
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    Yes, I had seen things online about multizone...

    Yes, I had seen things online about multizone minisplits.
    Could such a thing have the wall mount units on two different floors?
    When you say it's ductless, does that mean it's transporting cold...
  45. Replies
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    Can the central AC use its own blower? Yes the...

    Can the central AC use its own blower? Yes the blower on the furnace is just one speed.
    Laura
  46. Replies
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    That's actually a whole-house dehumidifier. I...

    That's actually a whole-house dehumidifier. I was wondering about controlling a central AC unit to dehumidify overnight - even though it might keep on cooling the house down. Maybe with a heating...
  47. Replies
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    That's actually a whole-house dehumidifier. I...

    That's actually a whole-house dehumidifier. I was wondering about controlling a central AC unit to dehumidify overnight - even though it might keep on cooling the house down. Maybe with a heating...
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    Where did my original post go to? It's...

    Where did my original post go to?
    It's definitely a question. I'm trying to find out what kind of control will do what I describe, dehumidifying overnight and in the fall/spring, whether it will...
  49. Thread: DC central air

    by plarian
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    I've been doing that. The one I talked to seems...

    I've been doing that. The one I talked to seems pretty well versed in many ways but didn't know things about different controls. It's a small town.
    Laura
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    what she said, what do you think?

    I had a local person over to look at my situation, what do you think of what she said?
    said that with newer central AC's I shouldn't need to undersize to dehumidify well, she said they are doing the...
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