OT: Flameproof Air Vent

[Jim Thompson]

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[John Larkin]

On Mon, 18 Jul 2005 19:47:05 -0700, Jim Thompson
<thegreatone@example.com> wrote:

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson

How about a trap door held up by threads; they burn and... slam!

Or a smoke detector, uP, backup battery, and louver-closing servo
system. One custom mixed-signal ASIC should do the whole thing.

John

 

[Joerg]

Hello Jim,

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I believe that's against code so there may not be any product on the
market. When we got a new metal roof the roofer installed a large vent
on top of the garage. That made a big difference. Should be even easier
with a composition roof. Tile may be a problem.

Regards, Joerg

http://www.analogconsultants.com

 

[Aubrey McIntosh, Ph.D.]

Jim Thompson wrote:

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson

Attributed to Sir Humphrey Davey.

http://www.minerslamps.net/homepage/safetylamphistory.htm

 

[Tom Del Rosso]

"Jim Thompson" <thegreatone@example.com> wrote in message
news:k2qod1dksdb4rhiq674d8duaiqsdh918fn@4ax.com...

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

You have more right to post OT than anyone, but don't you think you would
get more useful and reliable answers in alt.building.construction?


--

Reply in group, but if emailing add
2 more zeros and remove the obvious.

 

[Richard H.]

Jim Thompson wrote:

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

Presuming you have a gas water heater in the garage... local code has
changed in the last ~10 years - they now require 2 wall-mounted vents
(~6"x6", one near the cieling, other near the floor) to exhaust fumes
from stored chems / auto gas tanks. It has the added effect of venting
the heat, with screen to keep the critters out.

Or... a hatch with gravity-close held open by a cable + fusible link in
the combustible space. Typical approach for commercial roll-down fire
doors.

Richard

 

[JeffM]

I vaguely recall a vent design
that used some kind of metal filter that would pass air,
but quench a flame front
Jim Thompson

Nowadays you can't sell a water heater that doesn't have one of these.
It's a very fine metallic mesh.
Rich Trethewey showed a cutaway unit on Ask This Old House.

Got an "in" at a factory?

 

[Ptaylor]

Tom Del Rosso wrote:

"Jim Thompson" <thegreatone@example.com> wrote in message
news:k2qod1dksdb4rhiq674d8duaiqsdh918fn@4ax.com...

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.


You have more right to post OT than anyone, but don't you think you would
get more useful and reliable answers in alt.building.construction?

Also perhaps : alt.solar.photovoltaic ; alt.energy.homepower ,etc
Those guys know a fair bit about vents,etc.

 

[Jim Thompson]

On Mon, 18 Jul 2005 23:02:02 -0500, "Aubrey McIntosh, Ph.D."
<newsposter@spam.vima.austin.tx.us> wrote:

Jim Thompson wrote:
Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson

Attributed to Sir Humphrey Davey.

http://www.minerslamps.net/homepage/safetylamphistory.htm

Indeed it was something along those lines that I've seen applied to a
vent.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Jim Thompson]

On Tue, 19 Jul 2005 02:57:18 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:

Hello Jim,

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I believe that's against code so there may not be any product on the
market. When we got a new metal roof the roofer installed a large vent
on top of the garage. That made a big difference. Should be even easier
with a composition roof. Tile may be a problem.

Regards, Joerg

http://www.analogconsultants.com

Tile roof :-(

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Jim Thompson]

On Mon, 18 Jul 2005 22:10:36 -0700, "Richard H." <rh86@no.spam> wrote:

Jim Thompson wrote:
Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

Presuming you have a gas water heater in the garage... local code has
changed in the last ~10 years - they now require 2 wall-mounted vents
(~6"x6", one near the cieling, other near the floor) to exhaust fumes
from stored chems / auto gas tanks. It has the added effect of venting
the heat, with screen to keep the critters out.

Or... a hatch with gravity-close held open by a cable + fusible link in
the combustible space. Typical approach for commercial roll-down fire
doors.

Richard

What's gas ?

All-electric house.

But the roll-down fire-door may do the trick.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Jim Thompson]

On Tue, 19 Jul 2005 00:54:19 -0400, "Tom Del Rosso"
<ng01@att.net.invalid> wrote:

"Jim Thompson" <thegreatone@example.com> wrote in message
news:k2qod1dksdb4rhiq674d8duaiqsdh918fn@4ax.com...
Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

You have more right to post OT than anyone, but don't you think you would
get more useful and reliable answers in alt.building.construction?

I post where I "live" ;-)

But I'll give alt.building.construction a whirl.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Spehro Pefhany]

On Tue, 19 Jul 2005 06:45:34 -0700, the renowned Jim Thompson
<thegreatone@example.com> wrote:

On Mon, 18 Jul 2005 23:02:02 -0500, "Aubrey McIntosh, Ph.D."
newsposter@spam.vima.austin.tx.us> wrote:



Jim Thompson wrote:
Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson

Attributed to Sir Humphrey Davey.

http://www.minerslamps.net/homepage/safetylamphistory.htm

Indeed it was something along those lines that I've seen applied to a
vent.

...Jim Thompson

I made a flashback suppressor using bronze wool from a local marine
shop. Seemed to work okay (really tough gas to deal with-
stoichiometric hydrogen/oxygen). But if it failed to work it only was
a big pop and hard on the generator seals, not an earth-shattering
kaboom.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Oppie]

"Jim Thompson" <thegreatone@example.com> wrote in message
news:k2qod1dksdb4rhiq674d8duaiqsdh918fn@4ax.com...

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson

On marine inboard gas engines, a flame arresting screen is mandated on any
potential ignition source. For carburetor backfire this is an air filter
made with a sandwich of two bronze screens (like window screen) with a metal
mesh (like a stainless steel kitchen sink scrubbie) in between. The idea is
to cool the flame front below ignition temperatures.
Bob Oppenheimer

 

[JeffM]

I vaguely recall a vent design
that used some kind of metal filter that would pass air,
but quench a flame front
Jim Thompson

What's that about a pic being worth 1e3 words?
http://images.google.com/images?q=flame-arrestor+itnz+OR+pyramidfilters+OR+azarenergy-20un+OR+bgehome

 

[Genome]

"Jim Thompson" <thegreatone@example.com> wrote in message
news:k2qod1dksdb4rhiq674d8duaiqsdh918fn@4ax.com...

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

engineer@guymacon.com should be able to modify a normal non-flameproof one
by adding everyone to its killfile.

DMA

 

[John Larkin]

On Tue, 19 Jul 2005 18:29:21 GMT, "Genome" <ilike_spam@yahoo.co.uk>
wrote:

"Jim Thompson" <thegreatone@example.com> wrote in message
news:k2qod1dksdb4rhiq674d8duaiqsdh918fn@4ax.com...
Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

engineer@guymacon.com should be able to modify a normal non-flameproof one
by adding everyone to its killfile.

DMA

But you'll have to furnish a Project Document, a Requirements
Document, a Budget Document, a Specification Document, a Design and
Implementation Document, an Acceptance Document, and a Revision
History Document.

http://www.guymacon.com/ENGINEER/PLANNING/INDEX.HTM


John

 

[Howard Eisenhauer]

Jim, you can go the "flame arrestor" route as others have suggested.
Perforated sheet metal is readily available with a variety of hole
sizes, probably you wouldn't want to go bigger than 3/16". If I was
doing it just to make "doubly" sure I'd use two layers with a small
space between them.

I've also seen vents used in battery charging rooms that incorporate a
shutter that closes automatially when a head sensitive link melts. I
can get you a picture of one it you want but not sure how it would
work in a horizontal installation.

Howard.

On Mon, 18 Jul 2005 19:47:05 -0700, Jim Thompson
<thegreatone@example.com> wrote:

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I have added a pull-down stair-ladder for attic access, so hatch is no
longer needed for that.

I vaguely recall a vent design that used some kind of metal filter
that would pass air, but quench a flame front... contemplating a car
fire NOT propagating into the attic via the vent :-(

Anyone have pointers? My surfing is yielding a big fat zero.

Thanks!

...Jim Thompson

 

[Jim Thompson]

On Wed, 20 Jul 2005 02:01:54 GMT, Howard Eisenhauer
<howarde@REMOVECAPShfx.eastlink.ca> wrote:

Jim, you can go the "flame arrestor" route as others have suggested.
Perforated sheet metal is readily available with a variety of hole
sizes, probably you wouldn't want to go bigger than 3/16". If I was
doing it just to make "doubly" sure I'd use two layers with a small
space between them.

I've also seen vents used in battery charging rooms that incorporate a
shutter that closes automatially when a head sensitive link melts. I
can get you a picture of one it you want but not sure how it would
work in a horizontal installation.

Howard.

[snip]

Howard, I think that's the trick. I have vague recollections of
seeing a filter somewhat like A/C filters, but using brass "wool".

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Paul Hovnanian P.E.]

Jim Thompson wrote:

On Tue, 19 Jul 2005 02:57:18 GMT, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Hello Jim,

Contemplating using the hatch access from the garage into the attic as
a vent... 120°F temperature today plus vehicle heat makes garage very
uncomfortable.

I believe that's against code so there may not be any product on the
market. When we got a new metal roof the roofer installed a large vent
on top of the garage. That made a big difference. Should be even easier
with a composition roof. Tile may be a problem.

Regards, Joerg

http://www.analogconsultants.com

Tile roof :-(

Install a vent through an outside wall with a fan and thermostat.

I don't know if you want to dump hot air from your garage into your
attic. It just increases the heat load on your house.

--
Paul Hovnanian mailtoaul@Hovnanian.com
------------------------------------------------------------------
2 + 2 = 5 for extremely large values of 2.