[Bldg-sim] Selection of System 9 or 10 for heated only spaces
mayank.23aug at gmail.com
Wed Jul 18 21:30:59 PDT 2018
Thank you Sheila and Javed. However, there is still a gap in understanding
the exceptions. The question is whether the exception should be combined as:
1. Exception "a" says about dominant and non-dominant space type; and
source of heating for more than 20,000 sqft area.
2. Exception "b" says about use of system 3 and 4 for different cooling
load and/or different schedule based on building heating source type
However, for exception "e" should it be combined with exception "b" or "a"?
On Tue, Jul 17, 2018 at 8:27 PM, Javed Iqbal <javedvit at gmail.com> wrote:
> In scenarios where both gas and electricity are used as a heating source
> for the proposed system—for example, in the case of water loop heat pumps,
> which might be served by a gas-fired boiler, or a specific building with
> gas-fired dedicated outdoor air systems (DOAS) and all electric terminal
> units for heating—both electric and gas are counted toward the area served
> by the respective fuel type. Proposed building designs with systems like
> these are considered “hybrid” systems and map to the *fossil-fuel
> Hope this helps!!
> On Tue, Jul 17, 2018 at 4:24 PM Mayank Bhatnagar via Bldg-sim <
> bldg-sim at lists.onebuilding.org> wrote:
>> Dear All,
>> We have a residential project with hybrid heating source (gas+electric)
>> to condition the dwelling and corridor spaces. There are few electric
>> heaters serving stairwells and storage spaces. As per exception 'e' of
>> section G3.1.1, ASHRAE 90.1-2010, the thermal zones designed for heating
>> only systems in the proposed design, serving storage rooms, stairwells etc.
>> and not exhausting or transferring air from mechanically cooled thermal
>> zones in the proposed design shall use system 9 or 10 in the baseline
>> building design.
>> The query is whether the selection of system 9 or 10 is based on building
>> heating source (hybrid in this case) or as per unit heater's heating source
>> Thank you.
>> Mayank Bhatnagar
>> Senior Project Manager
>> *Environmental Design Solutions Pvt. Ltd. [EDS]*
>> D - 1/25
>> Vasant Vihar
>> New Delhi - 110057
>> Bldg-sim mailing list
>> To unsubscribe from this mailing list send a blank message to
>> BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG
> Javed Iqbal, LEED AP, CEA
> Sr. Energy Analyst
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Bldg-sim