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<font size="+1">Just some quick thoughts before you get too far
along in your design. I use the Ontario BC, a little different
from the BC BC but should be similar as the both are derived from
the NBCC. You can't use your corridors as a make-up air supply so
in ECM2 there should be no change in your corridor
pressurization. You must supply fresh air to every unit 24/7 and
I think you will find that at minimum a 50 cfm bathroom fan will
have to exhaust continuously to meet this requirement for a one
bedroom unit. Code may force you to use an HRV depending on your
circumstances, if so the question will be 1 per unit or possibly
one per floor. Remember once you move away from one per unit,
each unit and each floor is a fire separation at minimum. You
need to nail down your fresh air requirements for your units first
as the economics for this system will probably dictate what you do
with the rest of the HVAC system.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
</font><br>
On 09/03/2011 06:19 PM, Justin Allaire wrote:
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cite="mid:358F976B38137B4F8BDDCFAC7338374458F11C@R200.boxclever.local"
type="cite">
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<div dir="ltr" align="left"><font size="2" face="Arial"><span
class="231103122-09032011">To the Group,</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">INTRO:</span></font></div>
<div><font face="Arial"><font size="2"><span
class="231103122-09032011">I will prefacing this by saying
that this is essentially my first time using eQuest<span
class="073351723-09032011"><font color="#0000ff"> , </font><font
color="#000000">so please spare no detail. </font></span>(I
say essentially because I did use eQuest twice about 3
years ago<span class="073351723-09032011"><font
color="#0000ff">.</font></span></span></font></font></div>
<div><font face="Arial"><font size="2"><span
class="231103122-09032011"><span
class="073351723-09032011"></span></span><span
class="231103122-09032011">I have been tasked with
modeling a Multifamily Residential Unit Building. </span><span
class="231103122-09032011">The target is to be 10% better
than Ashrae 90.1 2007.</span></font></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">I
would appreciate some direction on how to set up the
model. Mostly with regard to the HVAC system selection, but
also confirmation that other items I mention below are
heading in the correct direction. </span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font><font
size="2" face="Arial"><span class="231103122-09032011">BUILDING
DESCRIPTION:</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">The
building is a 5 story building with non uniform foot prints
on each floor. Dwelling units are accessed from a common
interior corridor on each floor. Corridors are connected by
exit stairs and an elevator. There is a common multipurpose
area on the main floor. The main floor sits above unheated
parking. </span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">The
building is located near Vancouver Canada.</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">HVAC
SYSTEMS:</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">The
the proposed HVAC systems are very simple:</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">Dwelling
units have hydronic baseboard heat and no
cooling. Ventilation is "passive" via an outside air makeup
duct that will make up intermittent kitchen and bathroom
exhaust with no additional fan power or dedicated reheat
(just a simple duct from outside to behind the fridge). </span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">Corridors
are pressurized with a single make up air unit that will
temper air with a hot water coil. Again no cooling.</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">Hot
water for both systems is supplied from a district hot water
system in the neighbourhood. (The district hot water comes
from a central gas boiler plant).</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">
<div><font size="2" face="Arial"><span
class="231103122-09032011">PROPOSED ECMS:</span></font></div>
<div><font size="2" face="Arial"><span
class="231103122-09032011">We are currently looking at
two energy conservation measures (if required) to meet
our target of 10% better than Ashrae 90.1 2007</span></font></div>
<div><font size="2" face="Arial"><span
class="231103122-09032011">ECM1: additional external
rigid insulation as required.</span></font></div>
<div><font size="2" face="Arial"><span
class="231103122-09032011">ECM2: HRVS in the dwelling
units instead of passive makeup air for kitchen and
bathroom exhaust. This also permits us to reduce the
corridor pressurization air volume.</span></font></div>
</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">MY
PROCESS SO FAR:</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">Since
the building does not have a uniform foot print from floor
to floor I have skipped over the schematic design wizard to
take advantage of multiple shells in the design development
wizard.</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">I have
created a zone for each dwelling unit and for a zone for
each common corridor.</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">I
have ignored non tempered areas like the parking garage,
exterior storage, garbage areas, ect...</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">I
have assigned all the dwelling unit zones to "HVAC SYSTEM 1"
and all the corridors to "HVAC SYSTEM 2".</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">I'm
not sure where to assign the common area located on the main
floor.</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">MY
QUESTION<font color="#0000ff"><span
class="073351723-09032011">S</span></font>:</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011">Assuming
I'm on the correct path so far, w</span></font><font
size="2" face="Arial"><span class="231103122-09032011">hat I
believe I really need help with is choosing the correct
systems in eQuest to reflect proposed systems in the design.</span></font></div>
<div><span class="231103122-09032011"></span><span
class="231103122-09032011"></span><font size="2" face="Arial"><span
class="231103122-09032011"><span class="073351723-09032011">Also
can eQuest automatically generate an Ashrae 90.1 2007
baseline?</span></span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">Your
assistance in greatly appreciated,</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">Thanks
in advance.</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011">justin.</span></font></div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
<div><font size="2" face="Arial"><span class="231103122-09032011"></span></font><font
size="2" face="Arial"><span class="231103122-09032011"></span></font> </div>
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