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Posted by meirman on July 28, 2005, 7:24 pm
Does anyone know anything about the possibility of just using the fan
to recirculate the air, and hoping it will cool during the time it is
in the basement? I have output vents for the HVAC in the ceiling of
the basement, and the floor of the first and second floor.
But I think the only input is in the basement, by the stairs. ??
Would it have been of any value if the input was for example, in the
laundry room instead of by the stairs?
Meirman
--
If emailing, please let me know whether
or not you are posting the same letter.
Change domain to erols.com, if necessary.
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Posted by CL (dnoyeB) Gilbert on July 29, 2005, 12:06 am
meirman wrote:
>
> Does anyone know anything about the possibility of just using the fan
> to recirculate the air, and hoping it will cool during the time it is
> in the basement? I have output vents for the HVAC in the ceiling of
> the basement, and the floor of the first and second floor.
>
> But I think the only input is in the basement, by the stairs. ??
>
> Would it have been of any value if the input was for example, in the
> laundry room instead of by the stairs?
>
> Meirman
> --
> If emailing, please let me know whether
> or not you are posting the same letter.
> Change domain to erols.com, if necessary.
i run my fan 24/7 and it does cool off. I have no intake vents in the
basement, but the ducting seems to cool the air since the basement is
cool. It makes my house much more evenly cooled. But it does raise the
humidity a bit. Oh, and I have A/C too.
--
Respectfully,
CL Gilberthttp://www.rigidsoftware.com/Chess/chess.html
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Posted by Joseph Meehan on July 29, 2005, 12:24 am
meirman wrote:
> Does anyone know anything about the possibility of just using the fan
> to recirculate the air, and hoping it will cool during the time it is
> in the basement? I have output vents for the HVAC in the ceiling of
> the basement, and the floor of the first and second floor.
>
> But I think the only input is in the basement, by the stairs. ??
>
> Would it have been of any value if the input was for example, in the
> laundry room instead of by the stairs?
>
> Meirman
It will cool a little, but remember once the cool air is out of the
basement, it will be replaced with warmer air and then it will no longer
cool. You also should consider that the air is also likely to be humid and
it may not be all that comfortable. But it is cheap to try, your particular
conditions will determine how well it may work.
--
Joseph Meehan
Dia duit
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Posted by Black Adder on July 28, 2005, 8:03 pm
under no circumstances should return air ever I repeat ever be ducted
from a laundry room or area. If you need to replace your furnace in the
near future I can assure you that this will happen. The chemicals
contained in the cleaning agents in your laundry room will make a
lovely little acid when combined with the furnace gases. Will eat a
nice hole right through the heat exchanger in no time. If you wish to
use basement air the best solution is to take the blower door off the
furnace and run a full time fan. Be sure to put the door back on come
heating season or you will be drawing combustion gases in through the
system. Best recomendation is to install some form of A/C system
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Posted by on July 29, 2005, 5:01 am
>meirman wrote:
>> Does anyone know anything about the possibility of just using the fan
>> to recirculate the air, and hoping it will cool during the time it is
>> in the basement?
It will cool. The deep ground temp is about the same as the average
yearly air temp, 54.3 F where I live near Phila...
> It will cool a little, but remember once the cool air is out of the
>basement, it will be replaced with warmer air and then it will no longer
>cool.
But warmer air can extract more coolth from the soil, and soils have
thermal conductance: min 5.4 Btu-in/h-ft^2-F for sands, 11.4 for silts,
7.8 for clays, and 6.6 for loams, according to the ASHRAE Handbook of
Fundamentals. So a 2400 ft^2 basement floor with a U1.5 film conductance
near Phila might provide (70-54.3)2400x1.5 = 56.5K Btu/h of immediate
cooling to 70 F air, (like 11 window ACs), and less (but not zero) as
the ground warms up.
Soil's heat capacity is about 30 Btu/ft^3-F, so after the basement has
provided 30x2400(70-54.3) = 1.1 million Btu of coolth, warming the first
foot of clay soil, it can still cool at (70-54.3)2400/R2.2 = 20K Btu/h.
>You also should consider that the air is also likely to be humid and
>it may not be all that comfortable...
Run the AC at the same time.
Nick
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