[Greenbuilding] [BULK] Re: Question on tight house, carbon monoxide

Sat Feb 18 16:21:33 CST 2012

You can make an inexpensive prototype with tin flashing (like roof flashing)
it will not stand up to heavy use, but it's easy to shape with tin snips and
adjust to the right size.  Getting the adjustments of the skirt, the right
spacing between the stove and the pot and the skirt is very important and it
may take a couple of tries.  (The wok supports have round holes, you may
tinker with it and discover whether you need them).  You may also need some
form of additional support under your larger pots, which is another thing to
consider if you are building something. Once you know what you need, use
that for a while, or have a local metalworker build it in steel (no
galvanized).  Stainless is prettier, more durable and more expensive.

OR you may decide that those wok rings are cheap after all. I'd skip amazon
and check any Asian markets in your area.

Cheers,

Erin 

From: greenbuilding-bounces at lists.bioenergylists.org
[mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of KTOT
(g)
Sent: Saturday, February 18, 2012 2:02 PM
To: Green Building
Subject: Re: [Greenbuilding] [BULK] Re: Question on tight house, carbon
monoxide

Sounds like a good idea. Any suggestions where to buy an inexpensive one?
The only one on amazon.com is over $30 with shipping which seems quite high.
Or if making one is quite simple, can you tell me how to do so (what
materials and such, in particular)? Thanks.

From: Erin Rasmussen <mailto:erin at trmiles.com>  

Sent: Saturday, February 18, 2012 2:33 PM

To: 'Green Building' <mailto:greenbuilding at lists.bioenergylists.org>  

Subject: Re: [Greenbuilding] [BULK] Re: Question on tight house,carbon
monoxide

You may want to buy/build a pot skirt (similar to a wok support - if you've
seen those). That will help the heat transfer, I don't know about the carbon
monoxide. This is a good, if slightly technical analysis of pot skirts:

http://stoves.bioenergylists.org/content/pot-skirt-investigat

Very Important!!! PLEASE keep opening your windows/doors.  With no stove
pipe (no above the cooking zone ventilation  to the outside), and a very
tight house, those CO readings you are seeing are depressingly normal, even
in the most efficient stoves, that's why venting is so important.  Shoot, I
can set off the CO alarm at my house on my electric range in my drafty
kitchen. 

:-) Erin 

From: greenbuilding-bounces at lists.bioenergylists.org
[mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of KTOT
(g)
Sent: Saturday, February 18, 2012 9:47 AM
To: Green Building
Subject: Re: [Greenbuilding] [BULK] Re: Question on tight house, carbon
monoxide

Yes, the canning and soup pots are larger than regular pots, significantly
larger than the circumference of the flame. No soot, however.

From: Bob klahn <mailto:Home-NRG at dnaco.net>  

Sent: Saturday, February 18, 2012 12:10 AM

To: greenbuilding at lists.bioenergylists.org 

Subject: Re: [Greenbuilding] [BULK] Re: Question on tight house,carbon
monoxide

One other thought though, on part of the original problem (based on an
assumption - always risky, so I'll check).
If the canning pot is larger than your normal pots and pans (most seem to
be), could the key to the high CO production be that the flame is impinging
on ( flaring out across) the bottom of the pot?  This will tend to reduce
the combustion efficiency (in extremes even soot up the pot bottom,educe
combustion efficiency and increase the CO production.

I'd expect the oven to be set to burn relatively efficiently, so we don't
hear of cooks keeling over, and produce less CO even when on for longer
times.

All speculation, but I bit my boot so deeply on the last one, I had 
Bob Klahn

I actually watch them quite closely to keep them from boiling over. The CO
level goes way up before they do occasionally boil over, however,
definitely. The CO level goes up when the flames are burning properly blue. 

No way could I have the stove vented outside when the house was built
without huge additional cost--I had an expert builder and confirmed this at
the time. Thus the alternative, a vent with carbon filter. No, it is not
against code, at least not here, definitely. 

  _____  

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