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Forum: Conservation 02-09-13, 08:45 AM
Replies: 59
Views: 39,663
Posted By AC_Hacker
There is a baseline contamination which is...

There is a baseline contamination which is out-gasing from materials and glues and coatings, etc. As I recall, you were planning to go all green materials, so the out-gasing would be less.

Then...
Forum: Conservation 05-08-12, 04:58 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
I recently went to a medium-sized meeting in a...

I recently went to a medium-sized meeting in a tight house, no mechanical ventilation... the meeting was upstairs, cathedral ceiling. People were sitting quietly and listening, no milling about.
...
Forum: Conservation 05-08-12, 03:10 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
15 CFM would actually be 0.35 ACH if you lived...

15 CFM would actually be 0.35 ACH if you lived alone in a 18' x 18' x 8' box.

...just don't have a party.

See: Human Comfort and Health Requirements...
Forum: Conservation 05-08-12, 12:44 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
I am glad that you are exploring fresh air...

I am glad that you are exploring fresh air options.

What are your finding in the research that you have conducted and the original work that you have done, so far?

-AC
Forum: Conservation 04-27-12, 09:51 AM
Replies: 59
Views: 39,663
Posted By AC_Hacker
This is very useful information. I...

This is very useful information.



I think that too many people underestimate what the Passive House target of 0.35 ACH50 really amounts to... it is almost a hermetic seal. 1.0 ACH50 is not...
Forum: Conservation 04-26-12, 01:18 AM
Replies: 59
Views: 39,663
Posted By AC_Hacker
ASHRAE's fresh air standards are actually more...

ASHRAE's fresh air standards are actually more generous (regarding fresh air replacement volume) than Passive House, although over time, they have adjusted their air change rates down, closer to the...
Forum: Conservation 04-25-12, 03:11 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
Well Drake, It sounds like the following do...

Well Drake,

It sounds like the following do not seem satisfactory for your needs:

Minimum ACH = 0.35
Any commercial HRV
Ground tubes


So it would be interesting to know if the...
Forum: Conservation 04-25-12, 03:04 AM
Replies: 59
Views: 39,663
Posted By AC_Hacker
Doomer, huh? Maybe something like this would...

Doomer, huh?

Maybe something like this would work for you up there...

http://ecorenovator.org/forum/attachment.php?attachmentid=2273&stc=1&d=1335340936

Best,

-AC
Forum: Conservation 04-24-12, 07:50 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
From your previous description of the addition...

From your previous description of the addition you intend to add to an existing structure, you likely will not reach critical infiltration sealing when you consider the entire structure... but if you...
Forum: Conservation 04-24-12, 03:31 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
... and I would add to that, if it did balance +...

... and I would add to that, if it did balance + and - ions, how do you actually know that it did?

...and would that have any effect on toxins out-gassing from materials inside the house?

Sure...
Forum: Conservation 04-24-12, 01:25 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
Fresh Air Is A Waste

From an energy-conservation point of view, introducing fresh air into a house is a waste. You will have to get rid of existing heated air, in order to introduce fresh air, so introducing fresh air...
Forum: Conservation 04-23-12, 11:58 AM
Replies: 59
Views: 39,663
Posted By AC_Hacker
You live in a pretty chilly part of the country,...

You live in a pretty chilly part of the country, come winter. The benefit to you would be greater than they would be for me, since the area I live in has milder winters. An HRV is definitely on my...
Forum: Conservation 04-23-12, 01:21 AM
Replies: 59
Views: 39,663
Posted By AC_Hacker
http://ecorenovator.org/forum/attachments/conserva...

http://ecorenovator.org/forum/attachments/conservation/811d1277401431-diy-ventilation-heat-exchanger-air-changes-per-hour.gif

So, if 2.73 ACH will create a windy condition in your house, it seems...
Forum: Conservation 04-22-12, 12:20 PM
Replies: 59
Views: 39,663
Posted By AC_Hacker
This is exactly the situation that many millions...

This is exactly the situation that many millions of homes experience right now.

BTW, you might be interested to see this ASHRAE table:
...
Forum: Conservation 04-22-12, 12:54 AM
Replies: 59
Views: 39,663
Posted By AC_Hacker
You guys are forgetting minimum oxygen levels and...

You guys are forgetting minimum oxygen levels and at the same time, maximum CO2 levels... this is what brings on the 'stuffiness' sensation. In fact, I have seen technical specifications on...
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