Modeling Fans for LEED

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I really appreciate the answer. I am going throught it in the next weeks and all of this stuff will be very helpfull .

No problem. I also found this a big change coming from eQuest and Trace 700. After you distill that IDL tool down to the essential inputs and outputs, it actually becomes a much easier task to ensure compliance IMO.

I used the spreadsheet, @nfonner. For these inputs : 2.76 m³ / s, Fan efficiency of 0.7 , the motor efficiecy of 0.88 , an A = 0 ( Been conservative ) . Then , I am getting the delta pressure output of 1188.54 Pa . I checked the values ​​as suggested in the spredsheet , and everything is all right . But , thinking about real project, I know que about 600 Pa is a reasonable delta pressure to be considered, and I am thinking that this value for the baseline is to high. Did you guys get high values ​​like this one? Is it right?

All other inputs remaining unchanged, the Pressure Rise will decrease with more realistic Tot Fan Effs. I'm working on a project now ranging from 42.3% - 61.4%. (Packaged Rooftops - some CV and some VAV) While 70% is really quite high in my opinion, it is only a default that I choose to keep since I am not complying with Pressure Rise and Tot Fan Eff from an energy code point of view.

...and yes. I have a few in that 1200 Pa range. (PSZ-AC Sys 3 - 90.1 with ~ 2,398 cfm (1.13 m3/s), 70% Tot Fan Eff, 87.5% Mtr Eff. & a marginal increase (0.14 bhp) due to filtration credits.)

Hi @nfonner , just to be sure that I understood it right: this range of 42.3 % - 61.3 % is the Tot Fan Effs?