The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

On Jan 22, 10:31*pm, mcp6453 wrote:
The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized.. How
do I solve the problem? Better seal the scuddle hole?

Is the dust only in the summer or is it year-round. Where do you
live, Arizona will be different from Maine

On Fri, 22 Jan 2010 23:31:19 -0500, mcp6453 wrote:
The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?
just be glad you only have to dust half the house.

On Jan 22, 10:31*pm, mcp6453 wrote:
The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized.. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run, it might be making the AC work harder pulling in
hot air and dust.

On Fri, 22 Jan 2010 23:31:19 -0500, mcp6453 wrote:

How
do I solve the problem? Better seal the scuddle hole?

Yes! Only open the sealed "scuddle" hole every 18 months or so on
average. Climb down and seal the leaks again after you get out.

On Jan 23, 12:04*am, ransley wrote:
On Jan 22, 10:31*pm, mcp6453 wrote:

The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run,

If the attic fan has the proper amount of intake openings, ie soffit
vents, gable vents, etc, then it's fine. The house is supposed to be
sealed up and seperate from the attic. And having a small motor, I
don't think an attic fan costs a lot to run either compared to overall
typical household usage.




it might be making the AC work harder pulling in
hot air and dust.

On Jan 23, 8:26*am, wrote:
On Jan 23, 12:04*am, ransley wrote:

On Jan 22, 10:31*pm, mcp6453 wrote:

The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run,

If the attic fan has the proper amount of intake openings, ie soffit
vents, gable vents, etc, then it's fine. * The house is supposed to be
sealed up and seperate from the attic. * And having a small motor, I
don't think an attic fan costs a lot to run either compared to overall
typical household usage.

it might be making the AC work harder pulling in



hot air and dust.- Hide quoted text -

- Show quoted text -

Right, probably a few issues he hasnt researched for proper fresh air
only venting. It probably pulls 300 watts or more from the ones I see,
300 watts for me is about 17$ a month 12 hrs a day, ive gotten a big
house all lit up inside and out down to 45$ a month so percentage wise
its alot. But I know in cooling season its a different ballgame, I
could spend 500+ a month cooling and im in shade, some houses in sun
are like ovens and I guess need attic fans.

Dust THeory is Aerosol Theory, FLuidised Beds, Packed COlumns and
such, usually found in chemical and mechanical engineering
literature. Also look for the Lennard-Jones potential in physical
chemistry - it has particle-shape factors which adjust physical
properties for ordinary flow and thermodynamic equations.

- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
http://www.panix.com/~vjp2/vasos.htm http://www.facebook.com/vasjpan2
---{Nothing herein constitutes advice. Everything fully disclaimed.}---
[Homeland Security means private firearms not lazy obstructive guards]
[Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos]

On Jan 23, 11:01*am, ransley wrote:
On Jan 23, 8:26*am, wrote:





On Jan 23, 12:04*am, ransley wrote:

On Jan 22, 10:31*pm, mcp6453 wrote:

The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run,

If the attic fan has the proper amount of intake openings, ie soffit
vents, gable vents, etc, then it's fine. * The house is supposed to be
sealed up and seperate from the attic. * And having a small motor, I
don't think an attic fan costs a lot to run either compared to overall
typical household usage.

it might be making the AC work harder pulling in

hot air and dust.- Hide quoted text -

- Show quoted text -

Right, probably a few issues he hasnt researched for proper fresh air
only venting. It probably pulls 300 watts or more from the ones I see,
300 watts for me is about 17$ a month 12 hrs a day, ive gotten a big
house all lit up inside and out down to 45$ a month so percentage wise
its alot.

That assumes it runs 12 hours every day, which is probably a stretch
even for Phoenix. Most places it's only going to run on very hot
days while the sun is high in the sky, which is more like 7 hours or
so. That's what mine does here in NJ. If it's July and hot, it will
come on around noon and go off by 7pm or so. That would put it in
the range of $10 a month, assuming electricity costs 17c a KWH and
that it runs every day. If it only runs 3/4 of the time, which is
what mine does, then it's down to $7.50 or so a month.



But I know in cooling season its a different ballgame, I
could spend 500+ a month cooling and im in shade, some houses in sun
are like ovens and I guess need attic fans.- Hide quoted text -

- Show quoted text -

Wow, $500 a month to cool a house in the shade with a non-cooling
electric bill of $45 sounds very high. What seer unit do you have?

mcp6453 wrote:
The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?
Hi,
If there is NP, then fan is running too fast or there is no suffcient
air intake from down stairs. I don't need attic fan, I have good attic
vent naturally.

wrote:
On Jan 23, 11:01 am, wrote:
On Jan 23, 8:26 am, wrote:





On Jan 23, 12:04 am, wrote:

On Jan 22, 10:31 pm, wrote:

The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run,

If the attic fan has the proper amount of intake openings, ie soffit
vents, gable vents, etc, then it's fine. The house is supposed to be
sealed up and seperate from the attic. And having a small motor, I
don't think an attic fan costs a lot to run either compared to overall
typical household usage.

it might be making the AC work harder pulling in

hot air and dust.- Hide quoted text -

- Show quoted text -

Right, probably a few issues he hasnt researched for proper fresh air
only venting. It probably pulls 300 watts or more from the ones I see,
300 watts for me is about 17$ a month 12 hrs a day, ive gotten a big
house all lit up inside and out down to 45$ a month so percentage wise
its alot.

That assumes it runs 12 hours every day, which is probably a stretch
even for Phoenix. Most places it's only going to run on very hot
days while the sun is high in the sky, which is more like 7 hours or
so. That's what mine does here in NJ. If it's July and hot, it will
come on around noon and go off by 7pm or so. That would put it in
the range of $10 a month, assuming electricity costs 17c a KWH and
that it runs every day. If it only runs 3/4 of the time, which is
what mine does, then it's down to $7.50 or so a month.



But I know in cooling season its a different ballgame, I
could spend 500+ a month cooling and im in shade, some houses in sun
are like ovens and I guess need attic fans.- Hide quoted text -

- Show quoted text -

Wow, $500 a month to cool a house in the shade with a non-cooling
electric bill of $45 sounds very high. What seer unit do you have?
Hi,
My utility bill includes water, power and never saw a bill of 500.00 in
any season. That is shocking to me. highest I got was ~350.00

On Jan 23, 2:47*pm, Tony Hwang wrote:
wrote:
On Jan 23, 11:01 am, *wrote:
On Jan 23, 8:26 am, wrote:

On Jan 23, 12:04 am, *wrote:

On Jan 22, 10:31 pm, *wrote:

The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run,

If the attic fan has the proper amount of intake openings, ie soffit
vents, gable vents, etc, then it's fine. * The house is supposed to be
sealed up and seperate from the attic. * And having a small motor, I
don't think an attic fan costs a lot to run either compared to overall
typical household usage.

it might be making the AC work harder pulling in

hot air and dust.- Hide quoted text -

- Show quoted text -

Right, probably a few issues he hasnt researched for proper fresh air
only venting. It probably pulls 300 watts or more from the ones I see,
300 watts for me is about 17$ a month 12 hrs a day, ive gotten a big
house all lit up inside and out down to 45$ a month so percentage wise
its alot.

That assumes it runs 12 hours every day, which is probably a stretch
even for Phoenix. * Most places it's only going to run on very hot
days while the sun is high in the sky, which is more like 7 hours or
so. * That's what mine does here in NJ. *If it's July and hot, it will
come on around noon and go off by 7pm or so. * That would put it in
the range of $10 a month, assuming electricity costs 17c a KWH and
that it runs every day. * If it only runs 3/4 of the time, which is
what mine does, then it's down to $7.50 or so a month.

But I know in cooling season its a different ballgame, I
could spend 500+ a month cooling and im in shade, some houses in sun
are like ovens and I guess need attic fans.- Hide quoted text -

- Show quoted text -

Wow, $500 a month to cool a house in the shade with a non-cooling
electric bill of $45 sounds very high. * What seer unit do you have?

Hi,
My utility bill includes water, power and never saw a bill of 500.00 in
any season. That is shocking to me. highest I got was ~350.00- Hide quoted text -

- Show quoted text -

The purpose of an attic fan being to remove hot air from attic', eh?

Not draw previously heated or cooled air from within the house
envelope and chuck it outside!

BTW here, with no cheap or night-time rates domestic electrcity here
averages just over 10 cents per k.watt/hr.

This seems to me to be rather reasonable; our electricity being 95%
plus (soon to be 100%) hydro generated. The dams and generators being
many hundreds of miles distant; for our total population of only half
a million people!

Completely separate and within the next few years there will be a
major new hydro project at the Lower Churchill in Labrador, Canada.
Electricity from the existing Churchill Falls installation wholesaling
now into the USA for something alleged to be around 2 cents per k.watt/
hr.
So it does appear that future hydro electric power costs could be
maintained at reasonable levels?

On Jan 23, 10:59*am, wrote:
On Jan 23, 11:01*am, ransley wrote:





On Jan 23, 8:26*am, wrote:

On Jan 23, 12:04*am, ransley wrote:

On Jan 22, 10:31*pm, mcp6453 wrote:

The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run,

If the attic fan has the proper amount of intake openings, ie soffit
vents, gable vents, etc, then it's fine. * The house is supposed to be
sealed up and seperate from the attic. * And having a small motor, I
don't think an attic fan costs a lot to run either compared to overall
typical household usage.

it might be making the AC work harder pulling in

hot air and dust.- Hide quoted text -

- Show quoted text -

Right, probably a few issues he hasnt researched for proper fresh air
only venting. It probably pulls 300 watts or more from the ones I see,
300 watts for me is about 17$ a month 12 hrs a day, ive gotten a big
house all lit up inside and out down to 45$ a month so percentage wise
its alot.

That assumes it runs 12 hours every day, which is probably a stretch
even for Phoenix. * Most places it's only going to run on very hot
days while the sun is high in the sky, which is more like 7 hours or
so. * That's what mine does here in NJ. *If it's July and hot, it will
come on around noon and go off by 7pm or so. * That would put it in
the range of $10 a month, assuming electricity costs 17c a KWH and
that it runs every day. * If it only runs 3/4 of the time, which is
what mine does, then it's down to $7.50 or so a month.

But I know in cooling season its a different ballgame, I
could spend 500+ a month cooling and im in shade, some houses in sun
are like ovens and I guess need attic fans.- Hide quoted text -

- Show quoted text -

Wow, $500 a month to cool a house in the shade with a non-cooling
electric bill of $45 sounds very high. * What seer unit do you have?- Hide quoted text -

- Show quoted text -

13 seer condensor , but its Space Pack and the Space Pack unit is
maybe 11 seer, it has a dark slate roof, and the house style is
Normandy so it was a enginered style great for parts of Europe that
benefited from solar gain in cooler climate, yes new glass would help
alot but its all custom, so no time soon.

On Jan 23, 11:47*am, Tony Hwang wrote:
wrote:
On Jan 23, 11:01 am, *wrote:
On Jan 23, 8:26 am, wrote:

On Jan 23, 12:04 am, *wrote:

On Jan 22, 10:31 pm, *wrote:

The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Do you really need a fan, id guess more venting or a smaller fan. Is
house closed up with AC on, the fan pulls alot of electricity, it
costs alot to run,

If the attic fan has the proper amount of intake openings, ie soffit
vents, gable vents, etc, then it's fine. * The house is supposed to be
sealed up and seperate from the attic. * And having a small motor, I
don't think an attic fan costs a lot to run either compared to overall
typical household usage.

it might be making the AC work harder pulling in

hot air and dust.- Hide quoted text -

- Show quoted text -

Right, probably a few issues he hasnt researched for proper fresh air
only venting. It probably pulls 300 watts or more from the ones I see,
300 watts for me is about 17$ a month 12 hrs a day, ive gotten a big
house all lit up inside and out down to 45$ a month so percentage wise
its alot.

That assumes it runs 12 hours every day, which is probably a stretch
even for Phoenix. * Most places it's only going to run on very hot
days while the sun is high in the sky, which is more like 7 hours or
so. * That's what mine does here in NJ. *If it's July and hot, it will
come on around noon and go off by 7pm or so. * That would put it in
the range of $10 a month, assuming electricity costs 17c a KWH and
that it runs every day. * If it only runs 3/4 of the time, which is
what mine does, then it's down to $7.50 or so a month.

But I know in cooling season its a different ballgame, I
could spend 500+ a month cooling and im in shade, some houses in sun
are like ovens and I guess need attic fans.- Hide quoted text -

- Show quoted text -

Wow, $500 a month to cool a house in the shade with a non-cooling
electric bill of $45 sounds very high. * What seer unit do you have?

Hi,
My utility bill includes water, power and never saw a bill of 500.00 in
any season. That is shocking to me. highest I got was ~350.00- Hide quoted text -

- Show quoted text -

500, then I said time for cfls everywhere and a new Energy Star
frige, and the heat wave broke.

On 1/22/2010 11:47 PM, hr(bob) wrote:
On Jan 22, 10:31 pm, mcp6453 wrote:
The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

Is the dust only in the summer or is it year-round. Where do you
live, Arizona will be different from Maine

Middle North Carolina

mcp6453 wrote:
The upstairs at my home is always has infinitely more dust than the rest of the
house. Another post in this group gave me a thought. The attic fan is on a
thermostat, and it runs quite a lot in the summer. Could that fan be creating a
negative pressure situation in the upstairs area such that dust is being drawn
into the room?

For hypothetical purposes, assume that the room IS negatively pressurized. How
do I solve the problem? Better seal the scuddle hole?

You are referring to an attic ventilation fan to keep the temperature
of the attic lower and not for ventilating the house?

TDD

On 1/27/2010 6:17 AM, The Daring Dufas wrote:

You are referring to an attic ventilation fan to keep the temperature
of the attic lower and not for ventilating the house?

It came with the house. I'm told that not ventilating the attic will reduce the
life of the shingles. When my house was built, it did not have a roof vent.
Since I put on a new roof, it does have one. Maybe I don't need the fan any more.

On Jan 27, 10:23*am, mcp6453 wrote:
On 1/27/2010 6:17 AM, The Daring Dufas wrote:

You are referring to an attic ventilation fan to keep the temperature
of the attic lower and not for ventilating the house?

It came with the house. I'm told that not ventilating the attic will reduce the
life of the shingles. When my house was built, it did not have a roof vent.

terry wrote:
On Jan 27, 10:23 am, mcp6453 wrote:
On 1/27/2010 6:17 AM, The Daring Dufas wrote:

You are referring to an attic ventilation fan to keep the temperature
of the attic lower and not for ventilating the house?
It came with the house. I'm told that not ventilating the attic will reduce the
life of the shingles. When my house was built, it did not have a roof vent.
Since I put on a new roof, it does have one. Maybe I don't need the fan any more.

Requirement here for attic venting is 0.3% i.e. 3 sq. feet per 100 sq
feet of ceiling space and arranged to provide cross venting. Fans can
help that cisrculation. Attic vent fans should NOT draw air from the
house itself.

My thought was that the attic fan could be drawing dust in from the
outside and depositing it in the attic where it finds any little opening
to infiltrate the upstairs room. Fine dust can stay suspended in air
for long periods and this dusty air could be getting past the opening
into the upstairs room where the scuttle hole is. The act of opening the
front door to the house could pull dust in from the attic.

TDD