A "breathing" frame house

[bill]

Judging on the schedule, CO2 is output with the steam. See: at zero - it is usually a high humidity outside, but the wall is cold enough that the water began to condense in it. Therefore, a water vapor permeability of the wall is sharply reduced, the concentration of CO2 is rising sharply. With a further decreasing of temperature the outside air becomes drier, the steam is removed from the wall better, CO2 concentration gradually decreases. Also, it is visible a clear dependence on a water vapor permeability of the material from which is made the wall. And the fact that in the wooden wall the water does not condense there are no jumps in the concentration of CO2.
A little bit messy.

[baltazar]

No, there is not. Two right cases you do not have to look at. See the details in the article.
A concentration dependence of T outdoor air is really seen.

[buldozer]

The experiment is interesting. but brutal and crooked. It was enough to drag a balloon with a carbon dioxide, to pit a certain amount of gas, and to observe the dynamics of the concentration of carbon dioxide under different conditions, the time to reach that status. It would be much more informative.
However, I hasten to note nevertheless that the concentration of carbon dioxide in a wooden house with a half-open window was different, therefore, the level of 1-2g/m3 was supported by puffing experimental personalities.

[constructor]

The experiment is interesting. but brutal and crooked. It was enough to drag a balloon with a carbon dioxide, to pit a certain amount of gas, and to observe the dynamics of the concentration of carbon dioxide under different conditions, the time to reach that status. It would be much more informative.
However, I hasten to note nevertheless that the concentration of carbon dioxide in a wooden house with a half-open window was different, therefore, the level of 1-2g/m3 was supported by puffing experimental personalities.

[expert]

Do you get money for the "Experiment"?.
Would you puff (over)? I would - yes .. for a good money, I would puff (over) more than those scientists, ten times more ...
Well, take me for puffing over..
What will you say?..I can it with a mouth.

[Summer]

Perhaps, I agree.
Yes, and there is not enough data in the article: what is the construction of walls, what is a concentration of CO2 in the air on the street, maybe they have a traffic jam under the window, etc. You can't make conclusions on this article.

[buldozer]

I do not understand, if I can for the blunt in detail ..
And breathable walls pf ecowool compared with log walls remained behind the scenes.
With a moisture, I figured out. But then I thought if there were conditions for the accumulation of moisture in the wall of wood or ecowool – a porous material. And once I swam.
I do not understand what does prevent the water back through the capillaries, and to evaporate from the inner wall?. And then to get into the stove in the form of steam?.

[buldozer]

So, no one measured it, and therefore you can not say anything definite. Only at the level of speculationd that it is not serious. We need a quantification. In addition, the construction of wall may be different: there is a wind-proof membrane or not, etc.
In general, there is a rising moisture in an ecowool. Only, now, it is unclear whether it is plus.
It turns out that if a condensation felt in a dew point (where the outer layer of ecowool), so, this condensation on the capillary soak the ecowool in general? Is it so good?.

[Summer]

A lot of things depend on the wall. In practice, (someone and somewhere made some measurements), a humidity ecowool "walking" during the year in the range of 8-18%. There are periods of a moisture accumulation, and there are also inverse processes.
The evaporation of moisture from the capillary is constant and almost the entire thickness of wool. Actually, the water evaporates from the external (outer) surface of wall, which provides a part of moisture transfer from the home. In general, the trajectory of a water molecule can be quite bizarre, but if the wall is not "closed" for a traffic of fume, a significant degree of certainty is expected the out of molecule.

[bill]

It is relatively evenly distributed over the column. A small peak in a dew point and a little on the surface.
Again, everything depends on the amount. What is faster?. Drying or receipt of a new condensate. But it seems to me that the conditions for drying are very well.
I wonder, why it is not completely dry?. It looks like there are drying problems in winter. And, interestingly, how does the thickness of wall affect these processes?.
Now, I want to make a thick wall. Moreover, a obscenely thick.

[baltazar]

Gentlemen, in the house of a medium size, with 150 squares, a heater is about 4 tons. The change of its internal moisture content of 1% is equivalent to 40 liters of water in the form of fallen condensate. 40 liters of condensate are 8000 cubic meters of indoor air, to the temperature of + 18 at a moisture 45% content, passed through the wall out into the -10 degree frost.
Clearly, not all the air goes through the walls, the steam is much "crafty", but the house is ventilated and heated (dries), and the moisture out of the wall comes out, so that the moisture content changes an ecowool even at 5% - a very long session . Virtually the entire season of frosts.

[Summer]

No difference. Look closely at the regulations. A maximum permissible concentration for a formaldehyde is the same.
What do you think what is more stringent maximum permissible concentration for CH2O - the atmosphere or the air of residential premises?.

[constructor]

A maximum permissible concentration determines the maximum permissible concentration of harmful substances. Depending on their actual number, Sanitary and Epidemiological Surveillance establishes the possibility of using the material for different purposes!. If a material can be used outdoors, it does not mean that it can be used indoors. Moreover, even the rooms are separated by the degree of "purity": a work zone is the area where people can stay until 8:00, residential premises, hospitals, etc. They are certified for a variety of materials!.
When foreign producers talk about sustainability CAP, it means only that its production is used for wood waste and wood saved!.
PS: Moreover, if the population is more than 200 thousand people or it is a resort area, the "maximum permissible concentration (MPC) of pollutants in the air of populated areas" should be multiplied by 0.8. Thus, the materials permitted for use in a small village may be illegal in a major city

[expert]

And you actually might distinguish FC and FSF plywood?. Judging by the certificate - no. I have already written, if you need a plywood for an internal use, then take only FC, but it should be compared with the OSB-2. Both are the same binder – a fenolkarbamid resin, less toxic than a phenol. And if you need a veneer on the facade or on the floor, yo can not use FC, sooner or later it will exfoliate. A plywood WBP - ise the same as in a phenol formaldehyde OSP3. And in the outer layers of glued OSP3 there other resins, less toxic, and a phenol formaldehyde WBP plywood is separated with only one thin layer of veneer. What does make you think that it will protect you? It is easy a gas permeability.
From OSB, note, the bulders make the furniture more often than a plywood. And do not confuse a particleboard and OSB. The OSB does not require gluing. In Japan today it is the last squeak – an interior is completely out of OSB (walls, a ceiling, a floor and a furniture). Personally, I do not have any relation to the manufacture of OSB, nor to its certification. And to any building materials, too. Alas, I am a former researcher in the field of molecular mechanisms of all living things. The interest in building materials due to a simple reason - the construction of their own country house.

[baltazar]

1. OSB is certified according to state standard 10632-89 Flake Specifications
2. Where a single certificate, allowing the use of OSB in the premises?.
3. The furniture is made of particleboard and OSB must be laminate.
4. In Japan, the OSB is covered with a protective varnish.
5. The former because they were engaged in counterfeiting certificates (as you wrote about it)?.

[Summer]

For 1 x 3 of plywood we take 163 kg of resin for OSB or a particle board, about three times more. Class E 1, of course, is not very harmful to the organism, but also there are no any positive in all laminated materials. (Not to be confused with the massive blades, gluing a different adhesive resin.). How will the fashionable OSB in our climate – where we have a cold, a moisture, a frost, a heat. I do not know, but I don’t like make the experiments on myself.

[constructor]

Yes, in these certificates you do not distinguish OSP2 and OSP3. But they are different. As well as a plywood and FC PSF. It shows the professionalism of certifiers.
What makes you think that the furniture OSB is laminated?. Have you seen it?. You make the frames of upholstered furniture directly from the real OSB.
In the interior that is quite natural that the OSB is covered with a decorative (not protective) finish.

[expert]

Former, because at some point of RESTRUCTURING, the salaries of Ph.D. were not enough even for getting to the place of work. I had to go abroad, as most of my classmates, but I felt sorry for the parents to leave.
The forgery of certificates was made by a computer and a printer at the request of the employer - the seller of all kinds of consumer goods, and then very rarely, when he did not have time to buy them. To buy a certificate was easy and simple.

[buldozer]

It's not usually a consequence of the "Hygienic rules"
If something is not laminated, the furniture will not be able to get the Sanitary-Epidemiological Conclusion. There is truth, the plates with a very low formaldehyde emission (for example, Egger), it is a Class E 0 (i.e. the emission is almost zero), but it is 60% more expensive than usual, and almost never occur.

[bill]

The working area is the area where the person works directly with a particular substance.
We are not talking about multiplying by 0.8. Where did you get this?. In front of me now there is an air maximum permissible concentration for populated areas guide, and there is not a word about any coefficient!. This factor only for specific areas - parks, motels and resorts.
As for the ecological compatibility of OSB, you are probably right. Because the problem of waste management and resource conservation abroad is in the 1st place. We have the same problems of ecology. But none is engaged in it. And not just ordinary people, but also the environmental services.