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Posted by dantheman on August 17, 2009, 11:31 pm
> On Aug 17, 9:18 pm, "Stormin Mormon"
> > Yes, it will reduce the air flow.
> Hey--good to hear from you again.. been a while :)
> I know the airflow will be reduced; my question should have read
> "would the amount of airflow restriction make a significant
> difference?" =A0Or.. will it still work just not 100% effecient? =A0More
> like 95%? =A0It's such a tiny space and i only really need it to be
> cooler and drier during the summer which, up here in Toronto, is quite
> short. =A0But brutally Hot and Humid (and beer affecting) for those two
> weeks.
> Okay i don't feel like taking it all apart and drilling those two
> holes an inch bigger etc. Ya Ya i'm getting lazy.
> So.. big difference or negligible?
> Thanks, Dan
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> Drill the holes and do it right, or else don't do it.
> You maybe need to go even larger than 4" depending on the total pipe
> lengths, back pressure, etc.
> Forget your brilliant idea of intake on one side of the building and exha=
ust
> on the other. =A0That definitely will not work right. =A0Ever hear of a t=
hing
> called "wind" or static pressure differential?
> It might work OK, but probably not. =A0Like condensate water all over
> everything? =A0Like ice where there shouldn't be any? =A0Like burned out =
motors
> from overheating?
> Jeeze. Homoaners really suck. =A0Always too cheap to do any job correctly=
the
> first time, but always eager to call at 2 in the morning to get it fixed.
> Because of homoaners, no wonder the labor rate gets doubled most of the t=
ime
> just to deal with the basterds.
The Cellar is located under the front landing and is 10ft x 5ft with
an extra 4ft x 4ft (with sloped ceiling) under the front steps.
Two 3" ABS pipes through the masonary walls, one at each long end of
the 10ft x 5ft part. One ABS pipe extends down near the floor. This
design came from an article written by some "expert" in home renos and
was supposed to provide airflow for the little cellar and bring cool
air in (from the pipe that goes near the floor). I even installed the
more expensive wire-shelving so that air could "flow" through the
shelves.
There is no "wind". In fact, so little air flowed that i installed a
bathroom fan vented out one ABS pipe (the one with the opening near
the ceiling) to encourage airflow (I had some mould growing before i
did this last year and since it has not returned. However, the little
space is at least 75%-85% humidity during this hot spell and 21 deg C.
It's 66 sq ft. Low ceiling. Fully insulated on the basement side
with a proper heavy, insulated exterior door with all the
weatherstripping. I just want to cool and dehumidify the tiny space
during the summer. The wine likes it better that way.
Does any company make a tiny little PAC with 3" exhaust? I can't find
one--just a 7500BTU unit with 4" venting. I already tried a regular
dehumidifier but that creates a lot of heat.
It's just a closet.
Thanks, Dan
|
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Posted by Zyp on August 19, 2009, 1:30 pm
dantheman wrote:
>> On Aug 17, 9:18 pm, "Stormin Mormon"
>>> Yes, it will reduce the air flow.
>> Hey--good to hear from you again.. been a while :)
>> I know the airflow will be reduced; my question should have read
>> "would the amount of airflow restriction make a significant
>> difference?" Or.. will it still work just not 100% effecient? More
>> like 95%? It's such a tiny space and i only really need it to be
>> cooler and drier during the summer which, up here in Toronto, is
>> quite short. But brutally Hot and Humid (and beer affecting) for
>> those two
>> weeks.
>> Okay i don't feel like taking it all apart and drilling those two
>> holes an inch bigger etc. Ya Ya i'm getting lazy.
>> So.. big difference or negligible?
>> Thanks, Dan
>> ==========
>> Drill the holes and do it right, or else don't do it.
>> You maybe need to go even larger than 4" depending on the total pipe
>> lengths, back pressure, etc.
>> Forget your brilliant idea of intake on one side of the building and
>> exhaust on the other. That definitely will not work right. Ever hear
>> of a thing called "wind" or static pressure differential?
>> It might work OK, but probably not. Like condensate water all over
>> everything? Like ice where there shouldn't be any? Like burned out
>> motors from overheating?
>> Jeeze. Homoaners really suck. Always too cheap to do any job
>> correctly the first time, but always eager to call at 2 in the
>> morning to get it fixed. Because of homoaners, no wonder the labor
>> rate gets doubled most of the time just to deal with the basterds.
> The Cellar is located under the front landing and is 10ft x 5ft with
> an extra 4ft x 4ft (with sloped ceiling) under the front steps.
> Two 3" ABS pipes through the masonary walls, one at each long end of
> the 10ft x 5ft part. One ABS pipe extends down near the floor. This
> design came from an article written by some "expert" in home renos and
> was supposed to provide airflow for the little cellar and bring cool
> air in (from the pipe that goes near the floor). I even installed the
> more expensive wire-shelving so that air could "flow" through the
> shelves.
> There is no "wind". In fact, so little air flowed that i installed a
> bathroom fan vented out one ABS pipe (the one with the opening near
> the ceiling) to encourage airflow (I had some mould growing before i
> did this last year and since it has not returned. However, the little
> space is at least 75%-85% humidity during this hot spell and 21 deg C.
> It's 66 sq ft. Low ceiling. Fully insulated on the basement side
> with a proper heavy, insulated exterior door with all the
> weatherstripping. I just want to cool and dehumidify the tiny space
> during the summer. The wine likes it better that way.
> Does any company make a tiny little PAC with 3" exhaust? I can't find
> one--just a 7500BTU unit with 4" venting. I already tried a regular
> dehumidifier but that creates a lot of heat.
> It's just a closet.
> Thanks, Dan
Ok Dan, I'll give it a try;
Let's say your space is 10ft x 5ft x 7ft = 350 cu. ft. And lets say you
need to ventilate your space completely 9 times an hour, so that's 3,150
cubic feet each hour, which requires 52.5 cubic feet per minute to
ventilate - . Let's look at most blowers and what they can move, generally
speaking, at 1/10" static you would need about 7" dia, at 1/2" static about
3" - 4" which is where you're at. So, if your blower can produce 1/2"
static pressure, you can move 50 cfm approximately. [That's assuming per
100' of resistance in duct. Which you have much less.... ]
If you want to dehumidify an area, you need to remove not only the humidity,
but the heat generated through the heat of compression as well. So good
luck - if I were you, I'd call a local, competent, licensed, insured, and
trained professional.
--
Zyp
|
|
Posted by dantheman on August 19, 2009, 3:01 pm
> dantheman wrote:
..
> >> On Aug 17, 9:18 pm, "Stormin Mormon"
> >>> Yes, it will reduce the air flow.
> >> Hey--good to hear from you again.. been a while :)
> >> I know the airflow will be reduced; my question should have read
> >> "would the amount of airflow restriction make a significant
> >> difference?" Or.. will it still work just not 100% effecient? More
> >> like 95%? It's such a tiny space and i only really need it to be
> >> cooler and drier during the summer which, up here in Toronto, is
> >> quite short. But brutally Hot and Humid (and beer affecting) for
> >> those two
> >> weeks.
> >> Okay i don't feel like taking it all apart and drilling those two
> >> holes an inch bigger etc. Ya Ya i'm getting lazy.
> >> So.. big difference or negligible?
> >> Thanks, Dan
> >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> >> Drill the holes and do it right, or else don't do it.
> >> You maybe need to go even larger than 4" depending on the total pipe
> >> lengths, back pressure, etc.
> >> Forget your brilliant idea of intake on one side of the building and
> >> exhaust on the other. That definitely will not work right. Ever hear
> >> of a thing called "wind" or static pressure differential?
> >> It might work OK, but probably not. Like condensate water all over
> >> everything? Like ice where there shouldn't be any? Like burned out
> >> motors from overheating?
> >> Jeeze. Homoaners really suck. Always too cheap to do any job
> >> correctly the first time, but always eager to call at 2 in the
> >> morning to get it fixed. Because of homoaners, no wonder the labor
> >> rate gets doubled most of the time just to deal with the basterds.
> > The Cellar is located under the front landing and is 10ft x 5ft with
> > an extra 4ft x 4ft (with sloped ceiling) under the front steps.
> > Two 3" ABS pipes through the masonary walls, one at each long end of
> > the 10ft x 5ft part. =A0One ABS pipe extends down near the floor. =A0Th=
is
> > design came from an article written by some "expert" in home renos and
> > was supposed to provide airflow for the little cellar and bring cool
> > air in (from the pipe that goes near the floor). =A0I even installed th=
e
> > more expensive wire-shelving so that air could "flow" through the
> > shelves.
> > There is no "wind". =A0In fact, so little air flowed that i installed a
> > bathroom fan vented out one ABS pipe (the one with the opening near
> > the ceiling) to encourage airflow (I had some mould growing before i
> > did this last year and since it has not returned. =A0However, the littl=
e
> > space is at least 75%-85% humidity during this hot spell and 21 deg C.
> > It's 66 sq ft. =A0Low ceiling. =A0Fully insulated on the basement side
> > with a proper heavy, insulated exterior door with all the
> > weatherstripping. =A0I just want to cool and dehumidify the tiny space
> > during the summer. =A0The wine likes it better that way.
> > Does any company make a tiny little PAC with 3" exhaust? =A0I can't fin=
d
> > one--just a 7500BTU unit with 4" venting. =A0I already tried a regular
> > dehumidifier but that creates a lot of heat.
> > It's just a closet.
> > Thanks, Dan
> Ok Dan, I'll give it a try;
> Let's say your space is 10ft x 5ft x 7ft =3D 350 cu. ft. =A0And lets say =
you
> need to ventilate your space completely 9 times an hour, so that's 3,150
> cubic feet each hour, which requires 52.5 cubic feet per minute to
> ventilate - . =A0Let's look at most blowers and what they can move, gener=
ally
> speaking, at =A01/10" static you would need about 7" dia, at 1/2" static =
about
> 3" - 4" which is where you're at. =A0So, if your blower can produce 1/2"
> static pressure, you can move 50 cfm approximately. =A0[That's assuming p=
er
> 100' of resistance in duct. =A0Which you have much less.... ]
> If you want to dehumidify an area, you need to remove not only the humidi=
ty,
> but the heat generated through the heat of compression as well. =A0So goo=
d
> luck - if I were you, I'd call a local, competent, licensed, insured, and
> trained professional.
> --
> Zyp
Thank you for the information. I found a DeLonghi Mini-Split Portable
A/C unit that has this small umbilical between the outside and inside
unit (1" x 2.5"). However, it looks like overkill--11,000BTU rating--
something that is made to cool a large living room, not a 350 cu. ft.
cellar space.
It's only 4yrs old, i saw it working fine, and he only wants $200 for
it.
But will it work? Or will it cool too fast to dehumidify?
Again, always appreciate the information provided by the competent,
licensed, insured, and trained professional hvac enthusiasts here on
this newsgroup :)
Dan
|
|
Posted by dantheman on August 19, 2009, 4:31 pm
> > dantheman wrote:
m...
> > >> On Aug 17, 9:18 pm, "Stormin Mormon"
> > >>> Yes, it will reduce the air flow.
> > >> Hey--good to hear from you again.. been a while :)
> > >> I know the airflow will be reduced; my question should have read
> > >> "would the amount of airflow restriction make a significant
> > >> difference?" Or.. will it still work just not 100% effecient? More
> > >> like 95%? It's such a tiny space and i only really need it to be
> > >> cooler and drier during the summer which, up here in Toronto, is
> > >> quite short. But brutally Hot and Humid (and beer affecting) for
> > >> those two
> > >> weeks.
> > >> Okay i don't feel like taking it all apart and drilling those two
> > >> holes an inch bigger etc. Ya Ya i'm getting lazy.
> > >> So.. big difference or negligible?
> > >> Thanks, Dan
> > >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > >> Drill the holes and do it right, or else don't do it.
> > >> You maybe need to go even larger than 4" depending on the total pipe
> > >> lengths, back pressure, etc.
> > >> Forget your brilliant idea of intake on one side of the building and
> > >> exhaust on the other. That definitely will not work right. Ever hear
> > >> of a thing called "wind" or static pressure differential?
> > >> It might work OK, but probably not. Like condensate water all over
> > >> everything? Like ice where there shouldn't be any? Like burned out
> > >> motors from overheating?
> > >> Jeeze. Homoaners really suck. Always too cheap to do any job
> > >> correctly the first time, but always eager to call at 2 in the
> > >> morning to get it fixed. Because of homoaners, no wonder the labor
> > >> rate gets doubled most of the time just to deal with the basterds.
> > > The Cellar is located under the front landing and is 10ft x 5ft with
> > > an extra 4ft x 4ft (with sloped ceiling) under the front steps.
> > > Two 3" ABS pipes through the masonary walls, one at each long end of
> > > the 10ft x 5ft part. =A0One ABS pipe extends down near the floor. =A0=
This
> > > design came from an article written by some "expert" in home renos an=
d
> > > was supposed to provide airflow for the little cellar and bring cool
> > > air in (from the pipe that goes near the floor). =A0I even installed =
the
> > > more expensive wire-shelving so that air could "flow" through the
> > > shelves.
> > > There is no "wind". =A0In fact, so little air flowed that i installed=
a
> > > bathroom fan vented out one ABS pipe (the one with the opening near
> > > the ceiling) to encourage airflow (I had some mould growing before i
> > > did this last year and since it has not returned. =A0However, the lit=
tle
> > > space is at least 75%-85% humidity during this hot spell and 21 deg C=
.
> > > It's 66 sq ft. =A0Low ceiling. =A0Fully insulated on the basement sid=
e
> > > with a proper heavy, insulated exterior door with all the
> > > weatherstripping. =A0I just want to cool and dehumidify the tiny spac=
e
> > > during the summer. =A0The wine likes it better that way.
> > > Does any company make a tiny little PAC with 3" exhaust? =A0I can't f=
ind
> > > one--just a 7500BTU unit with 4" venting. =A0I already tried a regula=
r
> > > dehumidifier but that creates a lot of heat.
> > > It's just a closet.
> > > Thanks, Dan
> > Ok Dan, I'll give it a try;
> > Let's say your space is 10ft x 5ft x 7ft =3D 350 cu. ft. =A0And lets sa=
y you
> > need to ventilate your space completely 9 times an hour, so that's 3,15=
0
> > cubic feet each hour, which requires 52.5 cubic feet per minute to
> > ventilate - . =A0Let's look at most blowers and what they can move, gen=
erally
> > speaking, at =A01/10" static you would need about 7" dia, at 1/2" stati=
c about
> > 3" - 4" which is where you're at. =A0So, if your blower can produce 1/2=
"
> > static pressure, you can move 50 cfm approximately. =A0[That's assuming=
per
> > 100' of resistance in duct. =A0Which you have much less.... ]
> > If you want to dehumidify an area, you need to remove not only the humi=
dity,
> > but the heat generated through the heat of compression as well. =A0So g=
ood
> > luck - if I were you, I'd call a local, competent, licensed, insured, a=
nd
> > trained professional.
> > --
> > Zyp
> Thank you for the information. =A0I found a DeLonghi Mini-Split Portable
> A/C unit that has this small umbilical between the outside and inside
> unit (1" x 2.5"). =A0However, it looks like overkill--11,000BTU rating--
> something that is made to cool a large living room, not a 350 cu. ft.
> cellar space.
> It's only 4yrs old, i saw it working fine, and he only wants $200 for
> it.
> But will it work? =A0Or will it cool too fast to dehumidify?
> Again, always appreciate the information provided by the competent,
> licensed, insured, and trained professional hvac enthusiasts here on
> this newsgroup :)
> Dan
I assume that the mini-split unit is balanced and that the 50 cfm
exhaust bath fan is enough to circulate? Obviously, i don't know what
Static Pressure is.
|
|
Posted by Stormin Mormon on August 18, 2009, 7:36 am
My guess is negligible. With the reduced air flow, the
condensor will run hotter, and the amperage draw of the unit
will go up. But, it sound worth the extra effort, for the
comfort.
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
On Aug 17, 9:18 pm, "Stormin Mormon"
> Yes, it will reduce the air flow.
Hey--good to hear from you again.. been a while :)
I know the airflow will be reduced; my question should have
read
"would the amount of airflow restriction make a significant
difference?" Or.. will it still work just not 100%
effecient? More
like 95%? It's such a tiny space and i only really need it
to be
cooler and drier during the summer which, up here in
Toronto, is quite
short. But brutally Hot and Humid (and beer affecting) for
those two
weeks.
Okay i don't feel like taking it all apart and drilling
those two
holes an inch bigger etc. Ya Ya i'm getting lazy.
So.. big difference or negligible?
Thanks, Dan
|
Page 2 of 2 << first < 1 2
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