All,
We are working on a project in which the predominant space type is Hotel rooms; hence, Baseline HVAC system type 2 has been selected. However, there are several spaces, such as BOH areas, restaurants, office areas, gym etc. which are clearly not residential. My question is, should those spaces go to System type 4 or 6 depending on their total floor area or should we put everything to System 2?
Thanks.
Kind regards,
Nikos
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
September 14, 2023 - 9:18 am
See the exceptions to G3.1.1. If any apply then do so. If not then the whole building is a System 2.
Nikos Tsitsikas
2 thumbs up
September 14, 2023 - 9:46 am
Thanks for getting back, Marcus.
So, according to exception a:
Use additional system type(s) for nonpredominant
conditions (i.e., residential/nonresidential or heating
source) if those conditions apply to more than 1900
m2 of conditioned floor area.
If we have more than 1900 m2 of nonpredominant condition, we can use other System types too. However, would that additional system be 4? Or 6?
Thanks again.
Nikos
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
September 14, 2023 - 10:05 am
To determine which system you use reenter Table G3.1.1A based on the non-residential area and heating system fuel.
Nikos Tsitsikas
2 thumbs up
September 14, 2023 - 3:24 pm
That makes sense.
Thanks Marcus!
Nikos Tsitsikas
2 thumbs up
September 15, 2023 - 6:31 am
Hi again Marcus. One more question please. If the project we are talking about consists of various small buildings which are less than 25,000 ft2, do we need to sum up all the non-residential spaces across all buildings to determine which Baseline HVAC system we should be using? Or should we treat each individual building separately and go for system 4 for those non-residential spaces?
Thanks again.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
September 15, 2023 - 2:36 pm
How are you modeling it? As one project or as separate ones and why? Not sure how to answer your question because it depends but if this is a hotel type of use and you are modeling the whole project I would be adding everything up, not treating them as separate buildings.
Mike Mentzos
HomeSeptember 15, 2023 - 5:09 pm
We are currently working on a project which has a total area of about 4,000m2. The project consist of several buildings, each of them is no more than 2,300 m2. So I can work as a "Projects with Several Physically Distinct Structures".
My question is if the appropriate baseline is system 4 or system 6?
In Accordance with Appendix G Table G3.1.1A
If my selection be in accordance of the area of each individual building we have "Nonresidential and 3 Floors or Less and <2,300 m2" and so the answer is system 4. On the other hand, in the case that I rely to the sum of the area of the project, my selection must be system 6, as the building Type is "Nonresidential and 4 or 5 Floors and <2300 m2 or 5 Floors or Less and 2,300 m2 to 14,000 m2"
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
September 18, 2023 - 2:25 pm
So I dug into this issue a bit. Turns out it does not matter if you are modeling them as one project for LEED. If your project consists of multiple building you enter Table G3.1.1A for each building separately, applying the exceptions to G3.1.1 for each.