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  1. Replies
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    I got it cleaned, everything went fine. The...

    I got it cleaned, everything went fine.
    The hvac guy told me he was surprised that I wanted a window AC cleaned. He said mostly, people just use them till they quit.
    But I'm glad I got it...
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    So the only reason an HVAC person would want to...

    So the only reason an HVAC person would want to run the AC as part of cleaning it, is to check if it needs further servicing?
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    Don't they do some kind of testing when they...

    Don't they do some kind of testing when they clean it? Why can't it be tested at that temp? Turn heat up, turn AC on?
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    clean AC in cold weather?

    I made an appt. to get my window AC cleaned. At the time the weather forecast said 63 F.
    Now, the forecast has gone down to about 40-45 F.
    Is it OK to run the AC a little for cleaning...
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    "Have it cleaned and let it run till it dies. "...

    "Have it cleaned and let it run till it dies. "
    They told me they can't clean it until the weather warms up. I was wondering why, because I want to get it done soon.
    It sounds like they want...
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    Perhaps the issue is that the window AC isn't...

    Perhaps the issue is that the window AC isn't supposed to run when the air outside is too cold. I read things saying, don't start it up after the winter, until it gets over 60 F.
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    It works, I ran it for a couple hours the other...

    It works, I ran it for a couple hours the other day.
    But I was told it should be running for a day or so before cleaning it.
    Is this true?
  8. Replies
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    Run window AC before cleaning it?

    I need to get my window AC cleaned (12K BTU).
    I was told that in order to clean it professionally, it should have been cooling shortly before. They don't want to clean an AC before it's been...
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    970

    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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    970

    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...
  14. Thread: air compressor

    by plarian
    Replies
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    615

    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...
  15. Thread: air compressor

    by plarian
    Replies
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    615

    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...
  16. Thread: heat pump

    by plarian
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    1,164

    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
  17. Thread: heat pump

    by plarian
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    1,164

    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...
  18. Thread: heat pump

    by plarian
    Replies
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    1,164

    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. ...
  20. Replies
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    11,598

    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...
  23. Replies
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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....
  24. Replies
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    11,598

    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...
  26. 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...
  28. Replies
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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...
  29. Replies
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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...
  30. Replies
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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...
  31. 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
  33. 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...
  34. Replies
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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
  35. Replies
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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...
  36. Replies
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    a

    a
  37. 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
  43. Replies
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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...
  44. Replies
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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...
  45. 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...
  46. 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...
  47. Replies
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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...
  48. Replies
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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...
  50. 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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