The Air Handling Unit Design Worksheet compliments the HVAC Load Calculation Worksheet. This worksheet assists the design engineer in accelerating initial design decisions and system selection. The simple and straight forward worksheet layout allows the design engineer to input, change, and manipulate multiple AHU variations to arrive at a suitable selection. The output from the worksheet is a one-page form showing all the pertinent data and design conditions needed to accurately select the proper air handling unit equipment to satisfy the space conditions.
Other AHU Programs
There are other Air Handling Unit Design Worksheet programs on the market that require more data input, produce large quantities of output, are very specific in terms of air handling unit selection. These programs are either manufacturer specific or are very expensive. The use of these programs is often necessary and beneficial when it comes time to perform the actual equipment sizing, selection, and specification. A design engineer who doesn’t spend the time manipulating air handling unit configurations would not be providing the building owner with professional service. It is imperative to design and select the most realistic and accurate systems and equipment for the building so that the owner receives the most economical and functional building possible. However, due to budget or time constraints, there are times when the more sophisticated unit selection programs are not fiscally reasonable.
For Example
In the early stages of the design process, when the owner, architect, and engineer are meeting to determine the best course of design to pursue, it is important to understand the impact of the HVAC system equipment on the overall design especially as it relates to space requirements. It becomes convenient to have a method by which the engineer can estimate these space requirements by quickly sizing the equipment required based on the current architectural design and extrapolating out to come up with mechanical room sizes, access into/out of and overall location within the building.
It’s also at this stage of the design when the owner, architect, and engineer make preliminary decisions about the type of systems that will be used. The team can narrow down or select the types of systems, depending on the total load, the desired system control, the required space setpoints, etc. Further information and design considerations on the Air Handling Unit Design Worksheet can be found on the HVAC Load Calculation Worksheet.
Air Handling Unit Design Worksheet
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