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Old 06-17-2020, 12:55 PM   #16
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Re: My "climate control workstation" for my bedroom.


These are old apartments built in 1971 with bricks outside and drywall inside. I don't understand myself where all this interior airborne moisture is coming from. It's as if the walls absorb outside moisture like a sponge to wick it indoors. Placing my hand inside the cold air vent of my a/c I can feel dampness like a condensed cold drinking glass. The cooling vent of my a/c is soaking wet. The portable a/c might not be as efficient at humidity reduction as a central a/c unit or a window or wall unit.
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Old 06-17-2020, 03:04 PM   #17
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Re: My "climate control workstation" for my bedroom.


Does your portable have selectable fan speeds. If so, try a slower speed.
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Old 06-17-2020, 04:52 PM   #18
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Re: My "climate control workstation" for my bedroom.


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Originally Posted by PortableACChap View Post
These are old apartments built in 1971 with bricks outside and drywall inside. I don't understand myself where all this interior airborne moisture is coming from. It's as if the walls absorb outside moisture like a sponge to wick it indoors.
I think you understand exactly what is happening.
I doubt there is any substantial insulation in those walls, certainly not up to current standards and probably no vapor barrier.
I know you appreciate the obvious low rent but in order to get an indoor climate you can live with you may have to consider moving.
There is a limit of what can be done with older building.
Are you anywhere near water? Is there a basement to that building?
I have personally seen buildings built over land that used to be wetland and the excessive moisture had ruined the roofs in a short amount of time.
How about your neighbors? What are their issues, similar I expect.
Excessive humidity can cause mold. Have you experienced any illnesses that could be attributed to that? The landlord MUST keep that building up to acceptable standards. I would survey the rest of the tenants and see what is going on.
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Old 06-17-2020, 11:36 PM   #19
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I have a single hose LG that looks like yours that I bought to use occasionally in my garage. When my central AC failed once, I used it in my bedroom. It lowered the temperature, but was ineffective in removing humidity. We have pretty nasty humidity in central South Carolina too. I wonder how much of it is the recirculating condensate scheme they use. I seem to remember that it has a slinger on one of the fans that recirculates the condensate on to the condenser coils. I know I can hear it sloshing around in there. Mine has a drain plug that can be removed.

I wonder if you could sit the unit on a platform, remove the plug, and let the condensate drain through a hose into a sealed bucket? Maybe you could even rig up some kind of ejector pump to empty the bucket through a hose that feeds out of the window? I would avoid open buckets of condensate, if you're trying to control the humidity.
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Old 06-18-2020, 03:04 AM   #20
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Re: My "climate control workstation" for my bedroom.


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I have a single hose LG that looks like yours that I bought to use occasionally in my garage. When my central AC failed once, I used it in my bedroom. It lowered the temperature, but was ineffective in removing humidity. We have pretty nasty humidity in central South Carolina too. I wonder how much of it is the recirculating condensate scheme they use. I seem to remember that it has a slinger on one of the fans that recirculates the condensate on to the condenser coils. I know I can hear it sloshing around in there. Mine has a drain plug that can be removed.

I wonder if you could sit the unit on a platform, remove the plug, and let the condensate drain through a hose into a sealed bucket? Maybe you could even rig up some kind of ejector pump to empty the bucket through a hose that feeds out of the window? I would avoid open buckets of condensate, if you're trying to control the humidity.
My portable a/c, like most, is supposed to take the condensed water it collects and expel it automatically through the exhaust hose in the form of steam, vapor or mist. I don't know about mine but some a/c even use this condensed water to help cool the condenser coils as well. My a/c does have a drain plug in back. The book says to empty it if it should ever become full. The a/c panel should indicate that the collection tank is full. My dual-hose a/c is sitting up 8" off the floor on cement blocks anyway so the hoses can reach the window kit. It makes it easier to drain the unit by hand in case that is ever needed. I don't know how humidity from the outside gets inside the home with all the doors and windows shut and the a/c continuing to recirculate the same air within the room's atmosphere. A dual hose unit does not draw in air from the outside as a single-hose design does. In the early summer of 2019 following heavy SW Oklahoma thunderstorms, it got as high as 90% with the single-hose unit running then. The dual-hose does control humidity considerably better than the single-hose unit I have ever did. Depending on the humidity level outside, my dual-hose unit can keep humidity down in the 50's during the day unassisted by a separate dehumidifier. Humidity usually rises locally here at night. It's 80 outside right now at 3 in the morning and the humidity is 53% outside. The humidity gauge in my bedroom right now is fluctuating between 61-68% at 68 degrees F room temp. The humidity was as low as 55% in my bedroom at 1 this morning. I got up after sleeping 9 hours since about 4 in the afternoon, and went the kitchen and cooked a pancake breakfast and washed dishes. I came back into my room 2 hours later and now the humidity is up in the 60's. I had the living room wall a/c running for about an hour while working in the kitchen.

There are no basements in my apartment building that I know of. There is no body of water nearby.
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Old 06-18-2020, 03:38 AM   #21
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Re: My "climate control workstation" for my bedroom.


I just checked the collection tank on my a/c right now. Only a couple drops came out when the plug was pulled.
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Old 06-18-2020, 04:12 PM   #22
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Re: My "climate control workstation" for my bedroom.


The dual-hose a/c I have is a 14,000 BTU unit.

https://www.homedepot.com/p/Honeywel...CDWW/312721584

Cools and dehumidifier up to 700 sq. ft. according to Home Depot ad. My bedroom is a slim 145 sq. ft.

I want to ensure I had more than enough cooling power on tap. It's imperative I get my room 68-70 degrees on the hottest days if possible.

Honeywell's smallest dual-hose portable is a 12,000 BTU unit advertised by Home Depot to cool and dehumidify rooms up to 450-550 sq. ft.

https://www.homedepot.com/p/Honeywel...EDWW/313154088
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Old 06-18-2020, 04:43 PM   #23
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Re: My "climate control workstation" for my bedroom.


One thing to remember about air conditioning. A smaller unit will always run for longer periods of time and remove more humidity while doing that.
A bigger unit will cool faster but may not run long enough to remove humidity.
The largest unit is usually not the best solution.
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Old 06-18-2020, 05:27 PM   #24
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Re: My "climate control workstation" for my bedroom.


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It's imperative I get my room 68-70 degrees on the hottest days if possible.

Why.?
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Old 06-19-2020, 04:32 AM   #25
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Re: My "climate control workstation" for my bedroom.


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Why.?
Well, because that's what I am personally comfortable with. I'm a polar bear!

70 DEGREES FAHRENHEIT is my GOLD STANDARD for COOLING PERFORMANCE.



Smaller air conditioners are available from Honeywell but only as single-hose models. My larger dual-hose a/c still controls humidity better than my smaller single-hose one as the single-hose one is drawing outside air into the home.
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Old 06-19-2020, 04:33 AM   #26
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Re: My "climate control workstation" for my bedroom.


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Well, because that's what I am personally comfortable with. I'm a polar bear!

70 DEGREES FAHRENHEIT is my GOLD STANDARD for COOLING PERFORMANCE.



Smaller air conditioners are available from Honeywell but only as single-hose models. My larger dual-hose a/c still controls humidity better than my smaller single-hose one as the single-hose one is drawing outside air into the home.



Have you ever been in a home that is 74F and 45%RH.
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Old 06-19-2020, 04:40 AM   #27
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Re: My "climate control workstation" for my bedroom.


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Have you ever been in a home that is 74F and 45%RH.
I don't remember. Using my air conditioner and my dehumidifier combined I can replicate that condition but my goal is to balance my in-home comfort with my electric bill. My dual-hose a/c controls humidity the best when it's set at 67 degrees on its own panel and my nightstand temp gauge indicates from 68-70 degrees F and my separate stand fan is placed right in front of the a/c. If I feel too cold in bed I have to turn my fan down or redirect where it is pointing to reduced felt wind chill. If I still feel too clammy while lying in bed trying to get to sleep I can turn on my dehumidifier for 1/2 hour or an hour since it has an auto-timer. High humidity makes my skin itch and burn. It's like not showering for a month.
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Old 06-19-2020, 04:47 AM   #28
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Re: My "climate control workstation" for my bedroom.


68F at 55%RH feels the same as 74F at 45%RH. Which feels the same as 72F at 48%RH.


So basically, setting your A/C to 72 or 74 and the dehumidifier to 45 %RH will still make you feel cool, and probably cost less in electric.


Your A/C is too over sized, and not able to remove enough moisture.


The cooler the room is, the less moisture an A/C can remove per hour of run time.
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Old 06-19-2020, 05:05 AM   #29
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Re: My "climate control workstation" for my bedroom.


Here is my power consumption diary:

June 18, 2020 @ 4:45 AM = 23741 KWH
-gone for one hour today for about 1 hour, 11;30 AM - 12:30 PM, a/c shut off for that period, high of 96 degrees F
with 14,000 BTU/11.4 Amp dual-hose a/c in use for day and dehumidifier used for 1/2 hour

24-hour period: 35 KWH consumed from June 17-June 18



June 19, 2020 @ 4:45 AM = 23770 KWH
-gone from home today for about 4 hours, 9:30 AM - 1:30 PM, a/c shut off for that period, high of 98 degrees F
with 10,000 BTU/9.2 Amp single-hose a/c in use for day

24-hour period: 29 KWH consumed from June 28-June 19


Tomorrow I will be home all day long and see how much power is being consumed with the single-hose a/c to get a better KWH comparison with dual-hose operation.

I may have to pay a little more on my energy bill to get room humidity just tolerable.
My bedroom is now 77% humidity and 70 degrees temp with the single-hose unit running and an outside humidity of 74% and outside temp of 77 degrees F.

My dual-hose can usually keep bedroom humidity from 58-65% under those outside conditions. I might have to turn on the dehumidifier for up to an hour to make me feel nice and dry in bed as I go to sleep. At about 55% humidity I feel quite comfortable in bed: when it's 60% and above I feel a bit gross and at 70% and above very nasty.
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Old 06-19-2020, 05:31 AM   #30
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Re: My "climate control workstation" for my bedroom.


It cost more to over cool a room, then to maintain 72 to 74F.



When you leave your room/home. Instead of turning off the A/C, try setting it 4 or 6 higher, so that the room doesn't build up too much humidity.


Your electric bill is showing some of the consequence of an over sized A/C.


The lower you set the temp, the less efficient the A/C is. Along with the dehumidifier also losing efficiency. So setting the A/C to 74 and the dehumidifier to 50 or 45%RH, should come out cheaper, and more comfortable. So combined, the A/C and dehumidifier won't run as long as the A/C only does now at the low temp you are setting the A/C to.
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