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Posted by Graven Water on June 26, 2008, 3:14 pm
Noon-Air writes:
I wrote:
show/hide quoted text
>> I don't believe a central AC could keep the humidity below 50% in the
>> spring and fall, without me having to run the AC and heater, or
>> maybe the AC and dehumidifier, at the same time.
> It will if the system is correctly sized and properly installed.
That's what I don't understand! What if it's too cold to run the AC,
yet warm enough so the heater isn't drying the air much? Say it's
60F, and the humidity without any AC is 70%. I would want to heat at
that temperature, not cooling! If you run the AC, won't it have
to be cooling things down to 55F?
I looked at an HVAC forum and there were a lot of people who said
their AC wasn't dehumidifying very much. I suppose you'd tell me
that they don't have systems that are optimized for dehumidifying.
But I still don't understand, simply, what about when it's cold
enough you'd want to use the *heat*, AND it's damp?
Laura
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Posted by Noon-Air on June 26, 2008, 4:14 pm
show/hide quoted text
> Noon-Air writes:
> I wrote:
>>> I don't believe a central AC could keep the humidity below 50% in the
>>> spring and fall, without me having to run the AC and heater, or
>>> maybe the AC and dehumidifier, at the same time.
>> It will if the system is correctly sized and properly installed.
> That's what I don't understand! What if it's too cold to run the AC,
> yet warm enough so the heater isn't drying the air much? Say it's
> 60F, and the humidity without any AC is 70%. I would want to heat at
> that temperature, not cooling! If you run the AC, won't it have
> to be cooling things down to 55F?
If you use a heat pump with the appropriate controls, you won't have a
problem. As to the hows and wherefores, may I recommend that you take a
couple of physics courses.... thermodynamics comes to mind, then attend the
local ASHRAE training, and any of the equipment manufacturers training that
you can get.
show/hide quoted text
> I looked at an HVAC forum and there were a lot of people who said
> their AC wasn't dehumidifying very much. I suppose you'd tell me
> that they don't have systems that are optimized for dehumidifying.
> But I still don't understand, simply, what about when it's cold
> enough you'd want to use the *heat*, AND it's damp?
Thats why I am talking about using a high efficiency heat pump with back up
strips and the correct controls. It will use the A/C to remove the humidity,
and the strips to keep it from blowing snowballs. I would highly recommend a
2 stage system such as the Rheem RPRL- JEZ Prestige series heat pump with
RHPL series air handler and Honeywell TH8321U1006 control with built in
humidistat.
Now please call your fav local *competent*, licensed, insured,
professionally trained, HVAC technician. You local tech can design a system
specifically for your home, that will do what you want it to.
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Posted by KJPRO on June 26, 2008, 5:27 pm
show/hide quoted text
> Now please call your fav local *competent*, licensed, insured,
> professionally trained, HVAC technician. You local tech can design a
> system specifically for your home, that will do what you want it to.
With the questions she's asking, I wouldn't count on it...
What if, she paints the windows black so the sunlight doesn't shine in?
Or what if, she has dirt hauled in to cover half the walls?
Or what if...
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Posted by Noon-Air on June 26, 2008, 8:53 pm
show/hide quoted text
>> Now please call your fav local *competent*, licensed, insured,
>> professionally trained, HVAC technician. You local tech can design a
>> system specifically for your home, that will do what you want it to.
> With the questions she's asking, I wouldn't count on it...
> What if, she paints the windows black so the sunlight doesn't shine in?
> Or what if, she has dirt hauled in to cover half the walls?
> Or what if...
or what if she had some thing other than a liberal arts degree??
show/hide quoted text
or was a <GASP> republican??
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Posted by Stan Brown on June 28, 2008, 8:42 am
> As to the hows and wherefores, may I recommend that you take a
> couple of physics courses.... thermodynamics comes to mind,
Now you're just being silly.
I *took* a thermodynamics course in college, as it happens and I can
tell you that no home heating/cooling devices were mentioned, much
less analyzed in enough detail to answer the PP's questions. Heck,
*humidity* wasn't mentioned. I suspect most thermodynamics courses
would be the same.
If you want to help, provide information, not red herrings.
--
Stan Brown, Oak Road Systems, Tompkins County, New York, USA
http://OakRoadSystems.com
Shikata ga nai...
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>> spring and fall, without me having to run the AC and heater, or
>> maybe the AC and dehumidifier, at the same time.
> It will if the system is correctly sized and properly installed.