We have a comment back from GBCI, stating: 1. The Baseline fan power calculations and the SV-A reports for the Baseline model indicate that the exhaust fan systems (xxx1 and xxx2, as indicated in the mechanical schedules provided for PI Form 4: Schedule and Overview Documents) have not been modeled identically in the Proposed and Baseline cases. All independent fan systems of the HVAC systems in the actual design must be modeled identically between the Proposed and Baseline models at actual equipment capacities (fan volume and fan power) as required by Table G3.1.10 in the Proposed building column, since the fan design air flow rates and fan power per Sections G3.1.2.8 and G3.1.2.9, respectively, only applies to system types 1 through 8 in Table G3.1.1A. Revise the Proposed and Baseline model so all independent fan systems of the HVAC systems are modeled identically between the Proposed and Baseline model. In addition, provide revised SV-A reports for the Proposed and Baseline model reflecting the changes. I have no idea what they are talking about! This space has a packaged unit serving it for basic ventilation and heating/cooling. It also has a supply fan (with exhaust louvers) for ventilation when a vehicle is inside idling. The supply fan has been modeled as an exhaust fan with the package unit, which seems a reasonable way to work within the confines of Equest. However, I don't know what the modeler is saying. I've seen similar comments from reviewers on various forums, but not really ever found out what the bottom line was. I don't think the supply (exhaust) fan should be modeled the same (fan power) in baseline and proposed, but I recall seeing somewhere that perhaps App G3.1.2.9 might not apply to that fan since it is not a typical tempering fan. Or is this the case? Are they just saying that they are confused about seeing a supply fan on the plans, and seeing an exhaust fan in the model? That doesn't seem too difficult to figure out. Help! I've spent a bunch of time on this and now am questioning many of my conclusions. Thanks
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