The green roof area of the project consists of a mix of trees, shrubs and sedum species.
1-On the form, in comparing the baseline and the target do those species need to be listed individually or does one row stating 'Mixed species' suffice?
2-Also, how should one determine the baseline case? Should it be the same as the design case, just omitting the controller efficiency?
Thanks!
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11474 thumbs up
November 3, 2013 - 1:53 pm
Regarding the species mix, I think it really depends on your design—what is the most reasonable accurate reflection of what you are doing. If the species are very intermixed, for example, then I would go with that. But if you can say clearly delineate different areas then why not do that on the form.There are no hard and fast rules for defining the baseline case. To answer your question, if the main thing you are relying on to achieve savings is controller efficiency, then yes, it might be the same as the design case except for that variable. However, one would normall step back and look at typical practice for the area and seek to define that, and then separately define what you are designing.
Noriko Nagazumi
Woonerf Inc.74 thumbs up
March 4, 2014 - 7:06 am
MM K,
You should use the same microclimate factor (kmc) for both the baseline and the design cases. The baseline case may not be turf only (species factor - ks 7). The baseline will use sprinklers, so you can expect some savings if your design case has drip irrigation. If the drip irrigation controller has moisture or rain sensors you will have extra savings, otherwise you should use a CE=1.
Good luck!