Part of my project is considered as fit out which means that there are some office floors where the area is divided into offices and to each office a chilled water tap point is provided is air conditioining and heating design is done but the tenant is expected to bring the a/c unit and to do his own duct distribution.
my question is can I consider these areas as designed and assume one big fan coil serving each office?and how leed reviewer would considere it other wise
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Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
June 6, 2012 - 5:32 am
IMO exactly correct. You must simulate the non-planned a/c units.
Where no HVAC is defined, use the baseline systems...a baseline fancoil.
Tarek Dalati
Sustainbility managerCRHI
92 thumbs up
June 6, 2012 - 6:17 am
what did you mean by IMO,
what did you mean by when no HVAC is defined?
is fit out considered as core and shell or designed?
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
June 6, 2012 - 6:38 am
IMO = in my opinion
In fact I will revise my previous comment. Since the HVAC is not defined here, I think the rules in Table G3.1 No. 8 should apply.
Check the Table G3.1.1A&B to check what the baseline system type is. If, for example, your project requires system 7. for the baseline, then you could split off and define these spaces as seperate thermal blocks and supply them with the relevant baseline system which brings ventilation, cooling and heating.
Tarek Dalati
Sustainbility managerCRHI
92 thumbs up
June 6, 2012 - 6:51 am
let me rephrase your reply.
1- you considered a fit out as a core and shell.
2-The baseline should be as per appendix G table,but the spaces area will be very small so i will choose the smallest one.
3- I will consider each office (to which ine tap point s provided )as a zone.
correct?
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
June 6, 2012 - 7:08 am
Good questions.
1. yes
2. no. the system type is considering the whole building as a whole, i.e. "where attributes make the building eligible for more than one baseline system type, use the predominant condition to determine the system type for the entire building."
3. not quite...you could just as always consolidate similar adjactent zones into one thermal block applying the rules of Table G3.1 No. 8...i.e. group offices that face the same direction and are next to each other.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
June 7, 2012 - 5:43 pm
2. Unless one or more of the exceptions to G3.1.1 apply.
3. Also pay attention to G3.1.1 as the baseline modeling of thermal blocks varies for different systems.