[Bldg-sim] Bldg-sim Digest, Vol 108, Issue 5

Lincoln Christopher Harmer via Bldg-sim bldg-sim at lists.onebuilding.org
Sun Nov 6 13:16:26 PST 2016


I would consider including the exhaust fan power in the baseline fan power
allowance. Although these fans are not interlocked with the primary HVAC
system they will impact it's performance depending on how building
pressurization will be maintained for the building.

If the design documents incorporate compensating hoods (exhaust fan with
DOAS) it definitely makes sense to include. If the design documents
*don't *include
a compensating hood, this would be a good EEM to investigate.


On Sun, Nov 6, 2016 at 2:01 PM, via Bldg-sim <bldg-sim at lists.onebuilding.org
> wrote:

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>    1. Re: Range Hood exhaust question (Julien MARREC via Bldg-sim)
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> ---------- Forwarded message ----------
> From: Julien MARREC via Bldg-sim <bldg-sim at lists.onebuilding.org>
> To: Jim Dirkes <jim at buildingperformanceteam.com>
> Cc: "bldg-sim at lists.onebuilding.org" <bldg-sim at lists.onebuilding.org>
> Date: Sun, 6 Nov 2016 20:13:02 +0100
> Subject: Re: [Bldg-sim] Range Hood exhaust question
> Same here, unless you have efficient fans, in which case you could call it
> a local exhaust, and use a baseline system fan power for that (can't
> remember the value)
>
>
> Envoyé de mon iPhone
>
> Le 3 nov. 2016 à 17:31, Jim Dirkes via Bldg-sim <
> bldg-sim at lists.onebuilding.org> a écrit :
>
> I vote for process load
>
> On Thursday, November 3, 2016, Chris Jones via Bldg-sim <
> bldg-sim at lists.onebuilding.org> wrote:
>
>> I am working on a school model. The Food Classroom has a number of stoves
>> with range hoods. These exhaust fans are hand on/off – not interlocked with
>> the HVAC system. I estimate 2 hours a day operation.
>>
>>
>>
>> Would the fan power of these range hoods be included in the HVAC system
>> fan power allowance? Or would you call it a process load – same in both
>> proposed and baseline?
>>
>>
>>
>> 90.1-2007 App G. is the referenced standard.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> *Christopher Jones, P. Eng.*
>>
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