I plan to submit the Carrier HAP load data for Load calculations and an April load data for Part Load Calculations, but I am not sure what to include for the Fan sizing and zone-by-zone load calculations, and Critical supply duct pressure loss calculations.
The main AHU's are base building so all I am installing are Fan Powered Boxes which I have hundreds of. Should I provide a few random static pressure loss calculations for the fan boxes? What exactly are they looking for with the fan zizing upload and critical supply duct pressure loss calculations?
Also, my question below I am still searching for an answer. Are my project space loads and project space equipment sizing capacities supposed to match exactly or are the equipment sizes supposed to account for diversity as well?
Thank You!
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
June 26, 2013 - 8:09 pm
Carrier data is correct.
Regarding the fans - see LEED Interpretation #10134
No need to do the VAV box fans. You only need to do the calc for units that individually serve >60% of the space. That said, you'll need to do the static calc and provide information for the unit serving your space, even if it isn't in your project scope or installed as part of the project.
Nick Chiarelli
1 thumbs up
June 27, 2013 - 8:38 am
Thanks for the response Dylan. None of the base building units serve >60% of the project space. There are over a dozen AHU's that each serve multiple floors. We are connecting stub-outs on each floor from multiple units to make a ring duct on each floor. Do I not need to provide a static pressure calc for any of these units?
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
July 2, 2013 - 9:51 pm
Nick,
That's tricky - In my view, the intention of the interpretation is that the credit only applies to only major pieces of equipment not smaller units. As in an AHU for the whole floor not a server room FCU.
In this case you seem to have large pieces of equipment, you just have a large sqft and it is spread out over multiple floors. So you could fill out the spreadsheet for each of the larger AHUs and ask for an interpretation. The credit is worth 5 points so it might be worth it.
Another thought would be to show that the cooling/heating systems/equipment serving all the AHUs complies (option two of the interpretation).
Nick Chiarelli
1 thumbs up
July 9, 2013 - 9:15 am
Dylan,
I will proceed with filling out the table with the total cooling capacity of the air handling units, the total heating capacity being provided to the tenent space, and the total tenant space fan & pump sizing (ahu fans, hot water pumps, chilled water pumps, chillers, cooling towers). Hopefully this will work.