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<DIV><FONT size=4>I am following this thread with great interest. It
relates to my specific situation. </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>We have some people who choose to live without ac.
Generally, I conclude that they acclimate to the higher humidity. I have
one house I designed with suspended concrete slab in the middle. This
lowers the mean radiant temperature at the peak summer day. Therefore,
they have comfort at a higher air temp and perhaps a lower relative humidity as
a result. This household chooses to keep windows open during the
day. </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>My own home which is on the way but not completed at being a
tight house, I cool the house by night flushing. Yeah, this results in
higher relative humidity. I do not have a large mass such as described
above. However, the typical mass will hold heat and humidity. I have
noticed that when it gets too cold for our preferences, I close the house up and
the temperature will rise even though the outdoor temp is colder than indoor
temp. I assume this is because the air temp is cooling the mass from
the surface. When the source of cooling is removed, the stored energy
below the surface raises the air temp. Of course there are also internal
heat sources also, (bodies, refrigerator, stove). </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>The issue about humidity is what I want to better
control. Night flushing for cooling is very affective in my rural setting
(no heat island). If air temp will go into 60’sF, I can cool house to 70F
and keep below 80, even into outdoor peak temp of upper 90s. I recorded
78.9F when 103F outside, the highest temp I have ever seen here. I have
made many improvements in tighness since that reading. However, I am sure
the humidity was high. I was not measuring humidity at the time.
Even with the higher humidity, when I walk into the house with outdoor air in
the 90s, it is much more comfortable. I have not experienced the draconian
consequences discussed in the link:</FONT></DIV>
<DIV><A
href="http://www.greenbuildingadvisor.com/blogs/dept/musings/belgian-passivhaus-rendered-uninhabitable-bad-indoor-air"><FONT
style="FONT-SIZE: 12pt">http://www.greenbuildingadvisor.com/blogs/dept/musings/belgian-passivhaus-rendered-uninhabitable-bad-indoor-air</FONT></A></DIV>
<DIV><FONT size=4>The high humidity goes away when dryer atmospheric conditions
occur. </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>It seems that refrigerant systems are the only vetted systems
available to dehumidify. </FONT><FONT size=4>If a house is very tight where
night flushing can keep cool enough for comfort temp, which is better for
dehumidification: small ac or dehumidifier? </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>I am still working through the great link that Nick Pine
provided about the parameters for comfort. </FONT></DIV>
<DIV><A
title=http://www.scribd.com/doc/26886870/HVAC-Handbook-Thermal-Comfort-by-INNOVA#download
href="http://www.scribd.com/doc/26886870/HVAC-Handbook-Thermal-Comfort-by-INNOVA#download">http://www.scribd.com/doc/26886870/HVAC-Handbook-Thermal-Comfort-by-INNOVA#download</A></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>Eli </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4></FONT> </DIV>
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