Shell with only part of the roof exposed

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Hi Equest Experts:

As I recall from before, even if a roof has another shell immediately above and touching, the lower (covered) roof was still regarded as exterior and exposed to the elements. Is that still the same with v3-65?

It would be great to be able to change a roof property from an external construction type to an adiabatic surface? I cannot figure that one out. Any thoughts?

Thanks!

Jeff Ross-Bain, PE, LEED Fellow
Principal

404-220-8940 Office

404-220-8955 Direct

www.rbgb.com

Build Green. Save Time.

Jeff Ross-Bain3's picture
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Joined: 2011-09-30
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Jeff,

Still the same for 3-65.

Best and fastest way to change from external to internal surface type is still with a text editor working directly in the .inp file.

Steven Savich, CPD, LEED AP
Senior Mechanical Designer, Energy Analyst

[Description: cid:image003.jpg at 01CE44D4.DD6A74A0]Systems West Engineers

Steven Savich's picture
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Yep!

Although this isn?t really terrible from the eQuest interface either:

- Highlight the roof surface of interest in 3d view

- Right click the parent space in the component tree and create
new a interior wall from the context menu

- Give it a name if you like & choose ?from scratch?

- Location = ?Top? (this will default to the associated space
polygon), Construction = the appropriate roof construction

- Choose anything for the ?next to?? prompt, it doesn?t matter
when you?

- ? then set the new surface to be adiabatic in the surface
properties dialog

When done, delete the offending exterior roof surface, unless you want to
keep it around to trim to an actual exposed area.

Worth noting: in lieu of adiabatic, it?s just one extra step (seconds
really) to check before starting, and actually create a thermal link to the
appropriate space using the ?next to? dialog. If you do that you can leave
the interior surface as the default type ?standard.?

~Nick

*NICK CATON, P.E.*
*Owner*

*Caton Energy Consulting*
1150 N. 192nd St., #4-202

Shoreline, WA 98133
office: 785.410.3317

www.catonenergy.com

*From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] *On
Behalf Of *Steven Savich, LEED AP
*Sent:* Tuesday, July 07, 2015 2:36 PM
*To:* Jeff Ross-Bain; 'equest'
*Subject:* Re: [Equest-users] Shell with only part of the roof exposed

Jeff,

Still the same for 3-65.

Best and fastest way to change from external to internal surface type is
still with a text editor working directly in the .inp file.

*Steven Savich*, CPD, LEED AP

Senior Mechanical Designer, Energy Analyst

[image: Description: cid:image003.jpg at 01CE44D4.DD6A74A0]*Systems West
Engineers*

*From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org
] *On Behalf Of *Jeff Ross-Bain
*Sent:* Tuesday, July 07, 2015 2:32 PM
*To:* 'equest'
*Subject:* [Equest-users] Shell with only part of the roof exposed

Hi Equest Experts:

As I recall from before, even if a roof has another shell immediately above
and touching, the lower (covered) roof was still regarded as exterior and
exposed to the elements. Is that still the same with v3-65?

It would be great to be able to change a roof property from an external
construction type to an adiabatic surface? I cannot figure that one out.
Any thoughts?

Thanks!

*Jeff Ross-Bain, PE, LEED Fellow*
Principal

404-220-8940 Office

404-220-8955 Direct

*www.rbgb.com *

Build Green. Save Time.

Nicholas Caton's picture
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Joined: 2014-12-09
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Hi Jeff,

I will like to have a different perspective.
The thing that i want to suggest is in the wizard mode itself.
One can change the exterior roof to adiabatic in the wizard mode itself
which can be carried in detailed mode.

The thing that one has to do is to edit the third tab in wizard mode itself
with the help of following snapshot in the third screen.

[image: Inline image 1]

This window is from eQUEST 3.65 itself.This was also there in eQUEST 3.64.
This will change the roof properties.

Thanks,
Sharad.Kumar
Green Horizon Consulting LLP.
Gurgaon.

---------- Forwarded message ----------

Sharad Kumar2's picture
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Joined: 2015-05-21
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You could create a new construction with an R-1000 custom material, so
assembly U-value becomes near-zero. While at it, might also change its
solar reflectance to near-1 (unsure whether that helps). Save that, open
the inp in Excel. Use an if-then criteria in an additional helper column or
VBA and change all fake roofs' constructions to this R-1000 construction.
Hopefully that does it.

For the if-then criteria, you may have options such as looking at floor-Z
coordinates. Anything below certain Z value gets the fix..

CJ

Charudatta Joshi's picture
Joined: 2015-03-07
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