OT: Flameproof Air Vent

[Paul Hovnanian P.E.]

Howard Eisenhauer 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.

Use a spring-loaded door closer in conjunction with the fusible link.

--
Paul Hovnanian mailtoaul@Hovnanian.com
------------------------------------------------------------------
If you're ridin' ahead of the herd, take a look back every now and
then to make sure it's still there.

 

[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.

Decades ago in an 1880s vintage house in Texas, when I didn't have air
conditioning, I used a flue from some long forgotten device, probably a
wood stove.

The construction was a brick flue starting about 3' down from the
ceiling, supported by wood down to the floor. A 1/4" mesh to keep the
bats out. Extended a few feet above the ridge line.

The heat in the house produced a significant draft.

Have any outside walls to add a flue to?

 

[Richard H.]

Jim Thompson wrote:

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

The arrestor pics linked earlier look an awful lot like a grease filter
for a kitchen vent hood... maybe Home Depot has something that suits in
that area.

Richard

 

[Jim Thompson]

On Tue, 19 Jul 2005 22:15:04 -0700, "Richard H." <rh86@no.spam> wrote:

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

The arrestor pics linked earlier look an awful lot like a grease filter
for a kitchen vent hood... maybe Home Depot has something that suits in
that area.

Richard

There you go! The fog has been lifted ;-)

...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 22:15:04 -0700, "Richard H." <rh86@no.spam> wrote:

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

The arrestor pics linked earlier look an awful lot like a grease filter
for a kitchen vent hood... maybe Home Depot has something that suits in
that area.

Richard

Aha! I found restaurant grade filters in just about any size, with a
stainless version rated to 900°F.

Perfect! Thanks for the tip!

...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.

 

[Joerg]

Hello Jim,

Aha! I found restaurant grade filters in just about any size, with a
stainless version rated to 900°F.

Perfect! Thanks for the tip!

Just keep in mind that it might still be against code. Could become a
problem mainly in two situations: When you sell the house and the
inspector flags it or when something happens and the insurance finds out.

I believe the rule for hood filters is that there has to be a metal duct
all the way from the other side of the filter to x inches above the roof
line.

Regards, Joerg

http://www.analogconsultants.com

 

[Chuck Harris]

Joerg wrote:

Hello Jim,

Aha! I found restaurant grade filters in just about any size, with a
stainless version rated to 900°F.

Perfect! Thanks for the tip!


Just keep in mind that it might still be against code. Could become a
problem mainly in two situations: When you sell the house and the
inspector flags it or when something happens and the insurance finds out.

I believe the rule for hood filters is that there has to be a metal duct
all the way from the other side of the filter to x inches above the roof
line.

That is correct. It is never ok to have an air vent that connects a living
space to a non living space attic. The situation is even more strict in
the case of garages that are attached to houses. In this case most codes
require that the garage ceiling be 5/8 inch "fire-code" drywall.

The proper method of venting such a garage would be to use steel ducting
from a vent fan, through the attic space, to an approved vent enclosure
on the roof.

-Chuck