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<font face="Times New Roman, Times, serif"> Nick you understand
perfectly and Bill is the one you should be listening to. This is
what happens when marketing gets hold of something without talking
to engineering. It is all BS. I looked at both sites, basically
they are taking a low E thermopane and adding a third pane of
their heating glass.</font> <font face="Times New Roman, Times,
serif">A real good 2 pane IGU will be about R-4.2, add another
pane and you could be in the R-7 range or a U value of .14, all
centre of glass. There is no way 2 pieces of glass in this 3 pane
unit are the same temperature. If the middle piece is almost the
same temperature as the warm inside piece that actually proves you
have a huge amount of heat moving to outside not to the inside.
There will also be radiation, and in this instance it will be
significant as well. The reflective properties of the low E glass
will help, reflecting a certain percentage back into the room as
the glass should be throwing long wavelength radiation but a
significant portion will still flow through unless the low E coat
is thick enough, ie a mirror, which doesn't do much for looking
outside. Like you said earlier you have a radiator with a 70F
room one side and a winter night at -13F on the other side, it is
not rocket science to know in which direction most of the heat
will flow.<br>
Getting to the modelling using baseboards I don't think you
can. A baseboard is going to have a R-20 opaque surface behind it
and the heated glass is going to have a R-4 transparent surface
behind it.<br>
As far as I see it the only real benefit of this glass is you
will be able to run your humidity higher in the winter without
having condensation on the edges of the glass but at what I would
estimate to be a significant energy penalty. You would get most
of these benefits just by having the triple low E IGU with low
conductivity spacers or by having curtains. You will not heat a
room with it and be able to pay the hydro bill. Note all the
conformances are for glass. I don't see any insulating window
certifications. Until these are tested no jurisdiction in NA will
allow you to use them with the numbers they are quoting. <br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
<br>
</font><br>
On 12/08/2010 06:50 PM, Nick Caton wrote:
<blockquote
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<div class="Section1">
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Namrata,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I have patched Bill Bishop’s latest response in
below in
case you missed it. He’s a proven smart cookie, and if he’s
telling me I’ve got my head wrapped around the problem the
wrong way then
I do believe him… <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">…but with that caveat, the manufacturer implying
zero heat
transfer through the entire window assembly (because two of
at least 4 surfaces
have equal temperature), sounds like flat-out misinformation
to me. If two
surfaces of a material have equal temperature (say, 100 °F),
then yeah, the
conduction between them would be zero, but that won’t
prevent convection/radiation
from sweeping a majority of heat away when one side is
subject to sub-freezing
temperatures! My car for example has a heated rear window
which helps me
dislodge nightly glacier-formations in the wintertime. On a
cold day, the heat
generated in that glass may help heat the interior air
somewhat, but surely a
majority is going straight to the literally frozen exterior,
especially once
the interior air has risen to a temperature in which I can
breathe regularly. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I remain skeptical of the concept of using heated
windows as a
good idea for a space heating source (as opposed to a draft
or condensation mitigation
strategy – perhaps to melt snow in a skylight as well?).
Still, if these
units do put a significant fraction of heat into the space,
I think modeling
electric baseboard heating will at the least be a good start
to emulate the
space temperature behavior the actual system may help
achieve – though I’m
still stuck wondering how you might account for the amount
of energy that is
lost to the exterior as the units operate… hear me out as I
think my
ducks are in a row here =)!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I’d be cautious that your manufacturer may be,
intentionally or not, dumbing down the discussion by framing
their “effective
U-value” as a material property like “conductivity.”
Conductivity is an arbitrary material property that does not
change with
temperature – (i.e. steel has a higher conductivity than
air). U-values (and
R-values) on the other hand have that tricky little °F (or
°C) in their units,
because they are tied directly to a heat transfer rate,
which requires having a
delta-T – in other words, for a given set of material
properties, the
rate of heat transfer is dependent on the difference in
temperature the assembly
is subject to. That’s one reason we come across “summer”
and
“winter” U-values for window assemblies. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">It’s my intuition that eQuest (among other
variables) uses
the hourly exterior temperature from the weather file
alongside the hourly
calculated interior temperature for the parent zone to
determine what temperature
difference to use when figuring the hourly heat loss through
a window assembly.
A heated window however (when on) should be using a
fundamentally different
figure for the interior surface temperature than, say, 70°F
when determining a
temperature difference to find the hourly heat loss for the
zone. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I think I’m understanding now what we’re all
getting
at when we speak of “effective U-values:” If a baseboard
heating
element in eQuest (or other software) uniformly distributes
100% of its heat to
the zone, then we might account for the reality of a
significant (?) fraction being
lost straight out the window by increasing the window’s
effective U-value,
in turn modeling a realistically higher heat loss through
the assembly on
account of the higher-than-normal heat temperature
difference between the
innermost and outermost surfaces of the window, right? <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I could certainly be wrong, but an approach
defining an electric
internal equipment load with an custom equipment power curve
(see Bill, below) *<b>might</b>*
be easier than an approach defining dynamic window
properties (which I do not
think is feasible in eQuest). <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Again, I am not writing with full confidence that
I completely
understand exactly how heated windows truly function, but
critically thinking
this through is helping me get there! I look forward to
anyone stepping up to
the plate to affirm or refute my current understanding =).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">~Nick<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size: 11pt;
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color: rgb(31, 73, 125);"><img id="Picture_x0020_1"
src="cid:part1.06020007.07090507@bellnet.ca"
alt="cid:489575314@22072009-0ABB" height="37"
width="119"></span><b><span style="font-size: 11pt;
font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size: 11pt;
font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size: 11pt;
font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);">NICK CATON, E.I.T.</span></b><b><span
style="font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size: 7.5pt;
font-family: "Calibri","sans-serif";
color: rgb(204, 153, 0);">PROJECT ENGINEER</span><span
style="font-size: 7.5pt; color: rgb(204, 153, 0);"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">25501 west valley parkway<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">olathe ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">direct 913 344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">fax 913 345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">Check out our new web-site @ </span></i><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><a moz-do-not-send="true"
href="www.smithboucher.com"
title="blocked::www.smithboucher.com"><span
style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span
style="font-size: 10pt; font-family:
"Calibri","sans-serif"; color:
blue;"> <o:p></o:p></span></u></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family: "Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";"> Namrata Vora
[<a class="moz-txt-link-freetext" href="mailto:namrata.vora@soladigm.com">mailto:namrata.vora@soladigm.com</a>] <br>
<b>Sent:</b> Thursday, August 12, 2010 2:08 PM<br>
<b>To:</b> Nick Caton; Sami, Vikram; Sam Mason; Bishop,
Bill;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> active heating window modeling<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Thanks for your prompt responses<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">The mfg of this technology claim that since the
temp difference
b/n surface 3 & 4 is zero or minimal, there is no heat
transfer out through
the windows. In addition the radiant nature of the heat
allows the room temperature
to be set lower.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">This particular company claims a u-value of 0.14
in non-heated
state. I tried creating such a low u-value dual pane IGU
using WINDOW5 and was
unable to get that. So I created it directly in eQuest using
simplified glass
type method. Now will try adding the radiant heating as
electric baseboard as
suggested.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><a moz-do-not-send="true"
href="http://www.iqglass.com/products_iqglass/products_specs.html">http://www.iqglass.com/products_iqglass/products_specs.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I agree w/ Nick’s comment. In addition I wouldn’t
think the window would be in heating mode all the time. I
would need to figure
out when to trigger the heating.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Namrata <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Cell: 408-893-3729<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<div style="border-right: medium none; border-width: 1pt
medium medium; border-style: solid none none; border-color:
rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color;
padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";"> Bishop,
Bill
[<a class="moz-txt-link-freetext" href="mailto:wbishop@pathfinder-ea.com">mailto:wbishop@pathfinder-ea.com</a>] <br>
<b>Sent:</b> Tuesday, August 10, 2010 1:36 PM<br>
<b>To:</b> Nick Caton;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: [Equest-users] (no subject)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;">Nick,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">“The “efficiency” of these units … is
going to vary hourly (probably dramatically) based on the
outside-to-interior
temperature difference.” <i>Don’t think of it as less heat
to the
space, but more heat to the exterior. The window U-factor
should take care of
this.</i><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">“apply an ON/OFF/TEMP schedule to an equipment or
internal
energy load?” <i>You can apply an equipment power curve as
a function of
space temperature (EQUIP-PWR-FT).</i><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">“</span></i><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I’m concerned I might be missing
something” <i>For the same glazing properties, the heat
loss to the
exterior should be the same, EXCEPT that the interior
surface is now warmer, so
radiative and convective losses should be higher.
Hopefully the manufacturers
account for that in their rated U-factor. I’m not
convinced yet that
there is any energy benefit to this system.</i><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;">Bill</span><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;"><o:p> </o:p></span></p>
<div>
<div class="MsoNormal" style="text-align: center;"
align="center">
<hr align="center" size="2" width="100%">
</div>
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family: "Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";"> Nick Caton
[<a class="moz-txt-link-freetext" href="mailto:ncaton@smithboucher.com">mailto:ncaton@smithboucher.com</a>] <br>
<b>Sent:</b> Tuesday, August 10, 2010 12:15 PM<br>
<b>To:</b> Sami, Vikram; Sam Mason; Bishop, Bill; Namrata
Vora;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: [Equest-users] (no subject)</span><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">On further thought, I think the equipment
referenced would be
over-simplified if you just modeled an electric baseboard
(that was my
intuitive reaction also – a few beat me to the punch)…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">The “efficiency” of these units, meaning the
btu/h
delivered to the space for every input kW, is going to vary
hourly (probably
dramatically) based on the outside-to-interior temperature
difference. If
it’s -10F outside and 70F inside, these are going to lose a
ton of the
input heat to the exterior for the amount desired heat
flowing inside –
heat will flow proportionately to where it’s coldest.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Time allowing, I’d propose achieving a much
higher degree
of modeled accuracy by defining a series of equipment
loads, each with <u>a
custom multiplier schedule</u> (even if the units in
reality are under some
kind of thermostatic control) to account for when the units
would be turned on.
This would be more work, but then you’re able to define a
distinct
sensible HG ratio to account for the fraction of heat
actually entering the
space (instead of lost to the exterior). As you can define
up to 5
separate equipment load/schedule combinations for one space,
you could come up
with a weighted efficiency to apply to the SHG ratio for up
to 5 different
blocks of time. Further explanation: This would involve
creating
hourly reports to compare the hourly exterior temps to the
target heating temp
for the interior, for the times the units would be
operating, and to use that
info to figure out an hourly efficiency for the system based
on how much heat
would actually find it’s way into the interior zone. Those
hourly
results could be used to come up with weighted SHG ratio
values for 5 blocks of
time.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">On a related note, I’ve got a question for
everyone:
Does anyone know of any workaround (aside from extensive
excel
number-crunching) to apply an ON/OFF/TEMP schedule to an
equipment or internal
energy load?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">On another tangent, for my own education, am I
wrong to consider
heated glass as an intrinsically <u>inefficient</u>
approach to space heating?
It seems most appropriately applied as a “band-aid” or
“patch” solution to a decision to put too much glazing where
drafts
will cause discomfort. One of the previous links has a
claim: “</span>When
installed as part of a zone heating strategy, heated windows
can actually
reduce the overall energy consumption of a building by
decreasing dependence on
an inefficient HVAC system.<span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">” Wouldn’t this need to be a <u>terribly</u>
inefficient heating system to compare unfavorably to a
heating element losing
>50% of its energy to the exterior? I’m concerned I
might be
missing something fundamental for HVAC design here… =/<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">~Nick<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><img id="Picture_x005f_x0020_1"
src="cid:part1.06020007.07090507@bellnet.ca"
alt="cid:489575314@22072009-0ABB" border="0" height="37"
width="119"></span><b><span style="font-size: 11pt;
font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size: 11pt;
font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size: 11pt;
font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);">NICK CATON, E.I.T.</span></b><b><span
style="font-family: "Stylus
BT","sans-serif"; color: rgb(45, 77,
94);"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size: 7.5pt;
font-family: "Calibri","sans-serif";
color: rgb(204, 153, 0);">PROJECT ENGINEER</span><span
style="font-size: 7.5pt; color: rgb(204, 153, 0);"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">25501 west valley parkway<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">olathe ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">direct 913 344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">fax 913 345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size: 10pt;
font-family: "Calibri","sans-serif";
color: rgb(45, 77, 94);">Check out our new web-site @ </span></i><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><a moz-do-not-send="true"
href="www.smithboucher.com"
title="blocked::www.smithboucher.com"><span
style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span
style="font-size: 10pt; font-family:
"Calibri","sans-serif"; color:
blue;"> </span></u><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<div style="border-right: medium none; border-width: 1pt
medium medium; border-style: solid none none; border-color:
rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color;
padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>] <b>On
Behalf Of </b>Sami,
Vikram<br>
<b>Sent:</b> Tuesday, August 10, 2010 11:07 AM<br>
<b>To:</b> Sam Mason; Bishop, Bill; Namrata Vora;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] (no subject)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I stand corrected – it is a good U-Value </span><span
style="font-size: 11pt; font-family: Wingdings; color:
rgb(31, 73, 125);">J</span><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal" style=""><b><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">Vikram Sami</span></b><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;">,
LEED AP<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">Sustainable Design Analyst<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">1382 Peachtree St. NE, Atlanta, GA
30309<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">t: 404-443-7462
f: </span><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;"
lang="ES">404.892.5823 </span><span style="font-size:
9pt; font-family:
"Arial","sans-serif"; color: gray;">
e:
<a class="moz-txt-link-abbreviated" href="mailto:vikram.sami@perkinswill.com">vikram.sami@perkinswill.com</a> </span><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><a moz-do-not-send="true"
href="http://www.perkinswill.com/"><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;
text-decoration: none;">www.perkinswill.com</span></a></span><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom: 3pt;"><b><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;">Perkins+Will.</span></b><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;">
</span><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: rgb(173,
212, 37);">Ideas +
buildings that honor the broader goals of society</span><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: green;"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<div style="border-right: medium none; border-width: 1pt
medium medium; border-style: solid none none; border-color:
rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color;
padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";"> Sam Mason
[<a class="moz-txt-link-freetext" href="mailto:sam.mason@atelierten.com">mailto:sam.mason@atelierten.com</a>]
<br>
<b>Sent:</b> Tuesday, August 10, 2010 12:00 PM<br>
<b>To:</b> Sami, Vikram; Bishop, Bill; Namrata Vora;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: [Equest-users] (no subject)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";">Vikram,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";">The
conversion from W/sq.m.-K to Btu/hr-sq.ft.-F is 5.68. This
gives a U-value of
0.162 Btu/hr-sq.ft.-F.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";">I
would like to see a study of the energy consumption of this
window compared to
a building with normal low-e IGU and actual radiators. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";">Sam<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt;
font-family: Consolas;">--<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10.5pt;
font-family: Consolas;">Sam
Mason<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10.5pt;
font-family: Consolas;">Atelier
Ten<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif";"><o:p> </o:p></span></p>
<div>
<div style="border-right: medium none; border-width: 1pt
medium medium; border-style: solid none none; border-color:
rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color;
padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>] <b>On
Behalf Of </b>Sami,
Vikram<br>
<b>Sent:</b> Tuesday, August 10, 2010 11:47 AM<br>
<b>To:</b> Bishop, Bill; Namrata Vora;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] (no subject)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I’m a little curious – is 0.92 W/m2k a good
U-value?
Just poking around on online converters – it looks like the
IP version of
that is around 0.56 or something in that region – doesn’t
seem
spectacular (you get 0.25 with a lot of double pane low-e
IGUs). Unless the
0.922 is for the entire glazing assembly – in which case its
around the
same as other glass types. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I might have got the conversion factor wrong. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal" style=""><b><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">Vikram Sami</span></b><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;">,
LEED AP<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">Sustainable Design Analyst<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">1382 Peachtree St. NE, Atlanta, GA
30309<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: gray;">t: 404-443-7462
f: </span><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;"
lang="ES">404.892.5823 </span><span style="font-size:
9pt; font-family:
"Arial","sans-serif"; color: gray;">
e:
<a class="moz-txt-link-abbreviated" href="mailto:vikram.sami@perkinswill.com">vikram.sami@perkinswill.com</a> </span><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><a moz-do-not-send="true"
href="http://www.perkinswill.com/"><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;
text-decoration: none;">www.perkinswill.com</span></a></span><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom: 3pt;"><b><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;">Perkins+Will.</span></b><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: gray;">
</span><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: rgb(173,
212, 37);">Ideas +
buildings that honor the broader goals of society</span><span
style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: green;"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<div style="border-right: medium none; border-width: 1pt
medium medium; border-style: solid none none; border-color:
rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color;
padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>] <b>On
Behalf Of </b>Bishop,
Bill<br>
<b>Sent:</b> Tuesday, August 10, 2010 11:25 AM<br>
<b>To:</b> Namrata Vora;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] (no subject)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;">Namrata,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;">I
would model the heating as electric baseboards and select a
glazing type based on the U-value and SHGC.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;">Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family:
"Arial","sans-serif"; color: navy;"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family: "Franklin Gothic Medium
Cond","sans-serif"; color: black;">William
Bishop, PE, BEMP, LEED<sup>®</sup> AP </span></b><b><span
style="font-size: 10pt; font-family: "Franklin
Gothic Medium Cond","sans-serif"; color:
rgb(0, 102, 0);">|</span></b><b><span style="font-size:
10pt; font-family: "Franklin Gothic Medium
Cond","sans-serif"; color: black;">
Pathfinder Engineers & Architects LLP<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: black;">Mechanical
Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 5pt; font-family:
"Arial","sans-serif"; color: black;"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: navy;">134
South Fitzhugh Street</span><span style="font-size: 9pt;
color: navy;"><br>
</span><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: navy;">Rochester,
NY 14608</span><span style="font-size: 9pt; color: navy;"><br>
</span><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: navy;">T:
(585) 325-6004 </span><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: black;">Ext. 114</span><span style="font-size: 9pt;
color: navy;"><br>
</span><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: navy;">F:
(585) 325-6005</span><span style="font-size: 9pt;
font-family: "Arial","sans-serif";
color: black;"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: black;"><a class="moz-txt-link-abbreviated" href="mailto:wbishop@pathfinder-ea.com">wbishop@pathfinder-ea.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: black;"><a class="moz-txt-link-abbreviated" href="http://www.pathfinder-ea.com">www.pathfinder-ea.com</a></span><span
style="color: navy;"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 18pt;
font-family: Webdings; color: green;">P</span><span
style="color: green;"> </span><span style="font-size:
7.5pt; color: green;">Sustainability – less is more.</span><span
style="color: green;"><o:p></o:p></span></p>
</div>
<div>
<div class="MsoNormal" style="text-align: center;"
align="center">
<hr align="center" size="2" width="100%">
</div>
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family: "Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>] <b>On
Behalf Of </b>Namrata
Vora<br>
<b>Sent:</b> Tuesday, August 10, 2010 10:34 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] (no subject)</span><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><span
class="apple-style-span">How
does one model active heating windows like the ones listed
below.<o:p></o:p></span></p>
<div>
<div>
<p class="MsoNormal" style=""><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><a moz-do-not-send="true"
href="http://www.iqglass.co.uk/p/h/Products/U_Values_%26_Benefits/218/">http://www.iqglass.co.uk/p/h/Products/U_Values_%26_Benefits/218/</a></span><o:p></o:p></p>
<p class="MsoNormal" style=""><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"><a moz-do-not-send="true"
href="http://www.thermiquetech.com/about_heated_glass.html">http://www.thermiquetech.com/about_heated_glass.html</a></span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><span class="apple-style-span"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal">Namrata Vora<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">408-893-3729<o:p></o:p></p>
</div>
<p class="MsoNormal"><br>
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