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<p><font size="+1"><font face="Gill Sans MT">I have a Durisol/Nexcem
house, second one, actually. It is well-sealed and has
additional insulation to total approx. R40 in the wall
assembly. The temperature does not fluctuate widely, although
the house is still under construction and has only partial
ceiling insulation at the moment. During the last heat wave we
had in Ontario, the house remained cool, although humidity
increased to uncomfortable levels eventually. The mini-split
isn't hooked up in the new house as yet, but we did open
windows and it wasn't unbearable. Standing in front of the
south facing wall outside was another matter entirely...<br>
</font></font></p>
<p><font size="+1"><font face="Gill Sans MT">Within reason, we don't
seem to pay attention as much to temp; we notice temp <i>fluctuations</i>,
Avoiding those to a great degree means I can set the heat
lower in the winter and usually avoid a/c altogether in the
summer, (using only the dehumidifier option on the
mini-split.) </font></font><br>
</p>
<font size="+1" face="Gill Sans MT">My (Canadian) nickel's worth, as
we no longer have pennies.<br>
<br>
Lynelle Hamilton</font><br>
<div class="moz-cite-prefix">On 2018-07-15 3:10 AM, Paul Hadfield
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAMu5p=tq69x_ecpnUkcEyOSMWAT5bzm99wDSLcjLDY7zM64SMw@mail.gmail.com">
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<pre style="white-space:pre-wrap;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial">Reuben says: "Thermal mass (such as a brick or stone wall) would I think do a much better job producing comfortably cool summer evenings, but would not accomplish much in the winter"</pre>
<pre style="white-space:pre-wrap;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial">As Mike says, doesn't thermal mass provide a flywheel of heat through cold periods, as <a href="https://www.detail-online.com/article/house-without-heating-office-building-in-austria-16667/" moz-do-not-send="true">building 2226</a> (non-domestic, admittedly) shows?</pre>
<pre style="white-space:pre-wrap;color:rgb(0,0,0);text-decoration-style:initial;text-decoration-color:initial">Paul Hadfield.</pre>
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<div dir="ltr">On Sat, 14 Jul 2018 at 19:00, <<a
href="mailto:greenbuilding-request@lists.bioenergylists.org"
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When replying, please edit your Subject line so it is more
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Today's Topics:<br>
<br>
1. Year-round thermal comfort & insulation (Reuben
Deumling)<br>
2. Re: Year-round thermal comfort & insulation (Mike
O'Brien)<br>
<br>
<br>
<br>
---------- Forwarded message ----------<br>
From: Reuben Deumling <<a href="mailto:9watts@gmail.com"
target="_blank" moz-do-not-send="true">9watts@gmail.com</a>><br>
To: Greenbuilding <<a
href="mailto:greenbuilding@lists.bioenergylists.org"
target="_blank" moz-do-not-send="true">greenbuilding@lists.bioenergylists.org</a>><br>
Cc: <br>
Bcc: <br>
Date: Sat, 14 Jul 2018 07:43:24 -0700<br>
Subject: [Greenbuilding] Year-round thermal comfort &
insulation<br>
<div>I like insulation: the more the better as far as I'm
concerned. For keeping the cold out (speaking
colloquially) I've found that careful attention to air
sealing and insulation pays huge dividends. But for
keeping the summer heat out, I'm finding that the same
insulation does a far less admirable job. Stretches of
direct sun not only manage to heat up the room/house, it
feels like the insulation then does a good job of holding
that just-gained heat in. While cool nights with the
windows open typically solves the problem in our
relatively mild PNW climate I'm still perplexed why the
seasonal symmetry I (naively) expected is not evident. </div>
<div>The walls in question have two parallel but isolated
sets of studs and as much dense packed cellulose as I my
Forec 2 insulation blower can force into the nooks and
crannies. Thermal mass (such as a brick or stone wall)
would I think do a much better job producing comfortably
cool summer evenings, but would not accomplish much in the
winter. Are there hybrid wall assemblies I'm not aware
for? What am I missing?</div>
<div><br>
</div>
<div>Planned remedies: learn to make exterior shutters,
plant more trees.</div>
<div><br>
</div>
<div>Thanks!</div>
<br>
<br>
<br>
---------- Forwarded message ----------<br>
From: "Mike O'Brien" <<a href="mailto:obrien@hevanet.com"
target="_blank" moz-do-not-send="true">obrien@hevanet.com</a>><br>
To: Green Building <<a
href="mailto:greenbuilding@lists.bioenergylists.org"
target="_blank" moz-do-not-send="true">greenbuilding@lists.bioenergylists.org</a>><br>
Cc: <br>
Bcc: <br>
Date: Sat, 14 Jul 2018 08:40:38 -0700<br>
Subject: Re: [Greenbuilding] Year-round thermal comfort
& insulation<br>
<div style="word-wrap:break-word">Hi, Reuben—
<div><br>
</div>
<div>In our house we used lots of insulation, and also
thermal mass. The house is built on a slab, the southern
end has a clay finish floor, it has Durasol walls on the
south side, and there is a cob wall in the interior. We
also installed an ecoroof on the south facing side,
which helps reduce thermal gains on that area. I believe
the thermal mass helps dampen the temperature swings,
especially noticable in extreme weather. The west-facing
windows are shaded by a big cedar tree and a (sprawling)
wisteria, and the west-facing roof has solar water
panels on it. With your same night-flushing strategy,
our house remains comfortable, even when the outdoors is
in the 90s.<br>
<div><br
class="m_8304188968319261918webkit-block-placeholder">
</div>
<div> Best,<br>
<br>
Mike<br>
(503) 819-8991<br>
<br>
</div>
<br>
<div>
<div>On Jul 14, 2018, at 7:43 AM, Reuben Deumling <<a
href="mailto:9watts@gmail.com" target="_blank"
moz-do-not-send="true">9watts@gmail.com</a>>
wrote:</div>
<br
class="m_8304188968319261918Apple-interchange-newline">
<div>
<div>I like insulation: the more the better as far
as I'm concerned. For keeping the cold out
(speaking colloquially) I've found that careful
attention to air sealing and insulation pays huge
dividends. But for keeping the summer heat out,
I'm finding that the same insulation does a far
less admirable job. Stretches of direct sun not
only manage to heat up the room/house, it feels
like the insulation then does a good job of
holding that just-gained heat in. While cool
nights with the windows open typically solves the
problem in our relatively mild PNW climate I'm
still perplexed why the seasonal symmetry I
(naively) expected is not evident. </div>
<div>The walls in question have two parallel but
isolated sets of studs and as much dense packed
cellulose as I my Forec 2 insulation blower can
force into the nooks and crannies. Thermal mass
(such as a brick or stone wall) would I think do a
much better job producing comfortably cool summer
evenings, but would not accomplish much in the
winter. Are there hybrid wall assemblies I'm not
aware for? What am I missing?</div>
<div><br>
</div>
<div>Planned remedies: learn to make exterior
shutters, plant more trees.</div>
<div><br>
</div>
<div>Thanks!</div>
_______________________________________________<br>
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-- <br>
<div dir="ltr" class="gmail_signature"
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<div dir="ltr">Paul Hadfield
<div>
<div>Firelight Open Fires Ltd</div>
<div>Springside House</div>
<div>Scotland Lane</div>
<div>Burton Overy</div>
<div>Leicester LE8 9DR</div>
<div>Email : <a
href="mailto:paul.hadfield@firelight.co.uk"
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<div>Mobile 07867 978537 or 07071 202354</div>
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<div>Phone: 0116 259 0066; Fax: 0116 259 0183</div>
<div>email : <a href="mailto:mail@firelight.co.uk"
target="_blank" moz-do-not-send="true">mail@firelight.co.uk</a></div>
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