We are modeling a building in EnergyPro that is heating only, with radiant heating panels and ventilation thru DOAS.
We received a LEED review comment stating: "If the heating output capacity is greater than or equal to 10 Btu/hour/square foot then the space is considered conditioned so cooling should be included in the Baseline and Proposed Case models. The cooling should be modeled using the Baseline cooling system type (System Type 1) in both the Baseline and Proposed Case model using identical cooling capacity ratios and efficiencies in the Baseline and Proposed Case."
EnergyPro automatically models cooling into the baseline model, however, we did not model cooling into the proposed model. How are we supposed to model cooling into the proposed model, when it does not exist it real life?
Thank you,
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
November 6, 2015 - 2:48 pm
You have two options.
1. Model an identical to the baseline cooling system in both and then enter the cooling set point at a level that will ensure that it never operates. This work around is allowed by the modeling protocol.
2. Tell the reviewer that you are aware of #1 and feel it is a waste of time to include non-existent cooling systems, so you did not bother to include them in either model and remove the cooling from the baseline.
The second one has been accepted many times before. You most certainly should not be modeling a cooling system in the baseline and none in the proposed. This will likely overstate the savings.
Haojie Wang
Energy ModelerKJWW Engineering
4 thumbs up
November 6, 2015 - 2:56 pm
I believe you can cite 90.1 Addendum dn to model heating only system (9 or 10) for spaces that does not have cooling system in design.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
November 6, 2015 - 2:58 pm
You can only model a system 9 or 10 in certain, very limited space types. This usually will not include all the space types found in most buildings.