Air Systems are a collection of Zones served by common, central components such as heating coils, cooling coils, and fans. They are often the largest single pieces of equipment on a project along with one of the highest cost items of the mechanical package. Finally, they have a large impact on energy consumption over the life of a building. Given their importance in size, cost and energy sizing Air Systems correctly is of critical importance to sustainable building design.

How are Air Systems sized on the platform?

Air Systems as sized via the EnergyPlus engine use the coincident of all zone and system level loads. Coincident, or block load is the simultaneous load on the system at a specific (peak) time. The coincident load is an actual peak for the system or building taking into account the dynamic natural of individual zone loads that make up the total. The alternative to coincident load is a simplified peak load which ignores the time individual loads occur, resulting in a higher total value which is purely theoretical. To promote right sizing of equipment all results for Air Systems, Mechanical Plants and whole building are provided as coincident loads on the platform.

Detailed Air System Load Results (online view)

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Results for air systems are found on a dedicated tab on the loadmodeling.tool results page. Each Air System in the project can be selected to view the detailed results, including airflow, coincident loads, coil sizing and checks. Selecting the loads will open a graphic breakdown of end uses.

Spreadsheet Export

All results can also be downloaded as a spreadsheet by clicking the Export Spreadsheet button under the Air System Results List. The Spreadsheet will have 2 sheets - Air Systems Results Summary and Air Systems Results All. The Summary sheet provides the key sizing information for that system, including peak loads and airflow. The All sheet provides all the detailed information calculated for the systems, including the end use breakdown, safety factors, checks etc.

Air System Check Summary Report

Results can be downloaded to a standard pdf Check Summary Report which provides all the key data for each Air System on a single page. To generate this report simply click the Export pdf report button found under the Air System Result List header. The report includes the same information as the online view and is formatted to allow quick inspection of important results such as the auto calculated checks.

Using the Results

  • Sizing reports for the air system can be used for equipment selections by sharing with manufacturer reps

  • The online view allows for easy access of the results to your entire team. Use the Manage Team Feature to invite teammates to the project so they can collaborate.

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