[Equest-users] floor and shell multipliers; HVAC systems

Nick Caton ncaton at smithboucher.com
Mon Mar 21 11:18:29 PDT 2011


Hi Kirti,

 

For common reference, the illustration reads, from the ground up:  Floor
plan/plate # 1,2,3,4,1,2,3,4

 

1a.)  Each floor may be defined as a separate shell. This is common
practice when it's considered necessary to differentiate zoning per
level.  Shell multipliers, if used, should only used for floors #2 and
#3.  Floor plans  #1 and #4 are each unique, representing the ground and
top floor respectively - if you applied a 2x multiplier to them you'd
double your roof/ground-perimeter loads.

 

1b.)  Using multipliers for floors (shells) #2 and #3, the 3D view of
the building model will look something like this, from the ground up:
1,2,3,4,1,*hole*,*hole*,4.  From this, you can see you must at minimum
define 6 shells.  Copy the 4th floor plan's shell for the top floor, and
differentiate by defining the roof construction (where the others will
have no roof defined).  Differentiate the ground floor by including the
slab-on-grade/floor construction (where the others will not include a
floor construction).

 

2.)  Remember fewer shells is generally a virtue.  You may use just one
HVAC system, if desired.  An HVAC system assigned to a shell with
multipliers is assigned to each shell in the same fashion, if I'm not
mistaken. Whether you end up with one system overall, one per zone or
one per shell (floor) after the wizards is dependent on what you set for
the "system per ..." input field in the wizard HVAC screens.

 

~Nick

 

 

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

Smith & Boucher Engineers

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of kirti
pabrekar
Sent: Monday, March 21, 2011 6:55 AM
To: equest-users-request at lists.onebuilding.org;
equest-users at lists.onebuilding.org
Subject: [Equest-users] floor and shell multipliers; HVAC systems

 

hi all, 

 

in a project that i have to simulate, i have four types of floor plates
that repeat after an interval. please see rough sketch attached. i have
the following questions towards the working of the same. 

 

1. can i group these floor plates as a shell and use shell multipliers
to get the result. please explain how to effectively use floor
multipliers and shell multipliers.

2. in the design development wizard, we can create as many shells as
necessary. Do i need to create one HVAC system for each of the
respective shells created or is it okay to have just one system in place
for all the different floor plates. please explain / suggest the better
way to work with this.

 

thanks!

-- 

Regards,
Ar. Kirti Pramod Pabrekar.

IGBC AP, LEED India, 
M. Arch,
Environmental Planning and Design.
+91 9821 68 2280

 

...Green is a commitment...not a competition...

 

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